|
SCC3 20 Amp 12V Solar Charge Controller - The SCC3 is a solar charge
controller, its function is to regulate the power flowing from a photovoltaic
panel into a rechargeable battery. It features easy setup with one
potentiometer for the float voltage adjustment, an equalize function for
periodic overcharging, and automatic temperature compensation for better
battery charging over a wide range of temperatures. The SCC3 is able to handle
reverse polarity connection of both the battery and photovoltaic panel.... [G.
Forrest Cook] |
|
Scheme adds sequencing and shutdown control to regulator - 30-Oct-03
Issue of EDN Modern microprocessor- or FP-GA-based circuits require
separate and independent power-supply voltages for the core and the I/O
circuits. Some devices require stringent control of the turn-on
characteristics and sequencing of these multiple power supplies to avoid
internal parasitic current flows and consequent latch-ups.... [Design Idea by
Said Jackson, Equator Technologies Inc, Campbell, CA] |
|
Scheme implements multiple output ports - 02/16/98 EDN-Design Ideas
In µP/µC systems, you sometimes need to use many output ports and update all
the ports simultaneously. For instance, in systems that use multiplexing
techniques, the output ports require refreshing for every scanning period. One
example is a system of multiple dot-matrix LEDs....File has many circuits,
scroll to find this one.... [Design Idea by W Kurdthongmee, Nakorn Si
Thammarat, Thailand] |
|
Secondary Side Dual Output Controller Tightly Regulates Two Isolated Outputs
- DN1000 Design Notes (Linear Technology) (app note added
1/06) |
|
Self Powered Solar Box Furnace - This project involves the
construction of a self contained solar box furnace (Photo 1). I assembled the
prototype with materials that I had laying around my workshop. It is suitable
for heating up a small room or a detached shed. I use the furnace to warm up
my garage, it takes the chill out of a fairly large space when the weather is
cold, but sunny. It is possible to scale this project up to any size, a larger
version, or a set of them, could be used to add a lot of supplemental heat a
house.... [G. Forrest Cook] |
|
Self-oscillating H bridge lights white LED from one cell - 26-Nov-09
Issue of EDN Circuit operates on batteries as low as 0.6V.... [Design
Idea by Luca Bruno, ITIS Hensemberger Monza, Lissone, Italy] |
|
Sensitive Remote Control Tester - (electronic Circuit / Schematic
added 10/04) |
|
Sensored BLDC Motor Control using DSPic30f2010 - Microchip
Application Note Published 23-Jun-05 (app note added 6/06) |
|
Sensorless BLDC Motor Control using DSPic30f2010 Chinese - Microchip
Application Note Published 27-Jul-05 (app note added 6/06) |
|
Sequencer controls power supplies' turn-on and turn-off order -
18-Jan-07 Issue of EDN Two low-cost ICs and a few passive components
prevent disorderly shutdown.... [Design Idea by Eric Schlaepfer, Maxim
Integrated Products Inc, Sunnyvale, CA; Edited by Brad Thompson and Fran
Granville] |
|
Sequential state machine aids in automatic control - 2-Sep-04 Issue
of EDN Creating a sequential state machine is a common approach for
automatic-control design. The meth-od finds wide use for controlling
sequential processes in industry, robotics, and measuring. The concept of a
state machine is simple A number of states describe a process under
control; each state produces some output signals and advances to the next
state according to received input signal.... [Design Idea by Abel Raynus,
Armatron International, Malden, MA] |
|
Serial Infrared Remote Controller - a simple, cheap device that can
be connected to any serial port to control most components that have infrared
remote controls, includes schematics for receiver and transmitter (added 4/02)
|
|
Serial Servo Motor Controller - (circuit / schematic design added
6/06) |
|
Serial-driven IR remote Controller - This paper describes a serial
infrared transmitter (SIT) capable of generating the
infrared codes used by most current equipment that incorporates an infrared
remote control. It is operated by a computer through
an asynchronous communications port. Driver
software....(electronic design added 6/07) [Author is John H. DuBois III] |
|
Server Power Supply <600W - (application / block diagram added 6/07)
|
|
Servo Control of a DC Brush Motor - Microchip Application Note
Published 26-Aug-97 (app note added 2/06) |
|
Servo Controller - his circuit can be used to manually turn a servo
clockwise and anti-clockwise. By pushing the forward or reverse button
for a short period of time you can control the rotation of the servo….
|
|
Servo Pulse to Dual H-Bridge - interface performs vital control
functions needed for propulsion and steering of a “fighting robot”. (added
7/03) |
|
Servo Slew Rate Control - A circuit that limits the rate of change
of a signal; a feature of this design is that the positive and negative rates
can be different. (added 5/02) |
|
Several stepper Motor Control circuits - (circuit / schematic design
added 6/06) |
|
Short DC power-line pulses afford remote control - 25-Oct-01 Issue
of EDN If you face the challenge of adding a second, independently
controlled light source to an existing ceiling lamp controlled by a wall
switch, you may find that stringing a second power line is impossible. First,
you can replace the wall switch by the circuit in Figure 1. Pushing the on
switch S1 or S2 for approximately 1 sec inserts the 12V zener diodes D1 or D2
in series with the.... [Design Idea by Tom Hornak, Portola Valley, CA] |
|
Simple µC acts as dedicated motor-control - 09/11/98 EDN-Design
Ideas Motion-control systems often use a PWM signal to control the duty cycle
for a motor driver or amplifier module. Typical designs generate the PWM
signals using �Cs with dedicated PWM output lines, such as the PIC16C65
(Microchip Technology, www.microchip.com) and the HC11 (Motorola Inc....File
contains several circuits, please scroll down.... [Design Idea by Dylan
Horvath, Gecko Sysytems Inc, Austin, TX] |
|
Simple 4-CH Remote Control - You can construct your own long range
infrared (IR) wireless remote using Motorola's MC145026 emitter and MC145027
detector chips. With your remote you can control devices up to 20 feet (7
meters) away. It operates similiarly to a TV remote. You just point the
emitter at the detector, push a transmit button. The detector then interprets
your data signal. You can use this circuit to remotely turn on/off devices
(like a motors, relays, home appliances). ….(electronic schematic added 11/08)
|
|
Simple circuit allows long PWM soft-starts - 1-Feb-07 Issue of EDN
Enhance timing accuracy of a switching regulator's start-up ramp.... [Design
Idea by Robert N Buono, Aeolian Audio LLC, Bloomfield, NJ; Edited by Brad
Thompson and Fran Granville] |
|
Simple circuit controls stepper-motors - 8-Jan-04 Issue of EDN
Stepper motors are useful in many consumer, industrial, and military
applications. Some, such as personal-transportation systems, require precise
speed control. Stepper-motor controllers can be simple (Figure 1], but they
require a variable-frequency square wave for the clock input. The AD9833
low-power DDS (direct-digital-synthesis) IC with an on-chip, 10-bit DAC is
ideal for this task, becaus.... [Design Idea by Noel McNamara, Analog Devices,
Limerick, Ireland] |
|
Simple Circuit Disconnects Load from Battery - 03/14/96 EDN-Design
Ideas To prevent battery damage, the circuit in Figure 1 disconnects the
load at a predetermined level of load voltage. This load voltage, VTRIP,
is closely proportional to the battery voltage. R1 and R2 determine the level
of VTRIP that corresponds to voltage of 1.15V at pin 3 of IC1. A voltage
of 1.15V at pin 3 of IC1 causes the internal comparator to trip. Thus, VTRIP=1.15(R1+R2)/R1....
[Design Idea by Michael Keagy, Maxim Integrated Products, Sunnyvale, CA] |
|
Simple circuit provides motor feed control - 25-Jul-02 Issue of EDN
Because we needed a small grinding machine, we modified an old milling machine
that lacked a control system. The table of the grinding machine needed only to
move back and forth with adjustable feed. Using an existing dc servoamplifier,
a servo motor, and limit switches, we devised the circuit shown in Figure
1.... [Design Idea by Jean-Bernard Guiot, DCS AG, Allschwil, Switzerland] |
|
Simple DC Motor PWM speed control - ….(electronic schematic added
08/08) |
|
Simple ESC - with optoisolated input (schematic added 10/06)
|
|
Simple Infrared Remote Control - (circuit / schematic design added
6/06) |
|
Simple Remote Control Tester - Here is a handy gadget for test- ing
of infrared (IR) based re- mote control transmitters used for TVs and VCRs
etc. The IR signals from a remote control transmitter are sensed by the IR
sensor module in the tester and its output at pin 2 goes low. This in turn
switches on transistor T1 and causes LED1 to blink. At the same time, the
buzzer beeps at the same rate as the incoming signals from the remote control
transmitter.... |
|
Simple Sensitive Remote Control Tester - (electronic Circuit /
Schematic added 10/04) |
|
Simple servo Controller - This cicuit allows you to test a servo.
The angle of the servo can be set by means of the 10k potmeter. Perhaps you
will not be able to reach all positions with this circuit. Playing with
other.... |
|
Simple stepper motor controller - The circuit shown above can be
used to control a unipolar stepper motor which has FOUR coils (I've swiped it
off an old fax machine). The above circuit can be for a motor current of up to
about 500mA per winding with suitable heat sinks for the SL100. For higher
currents power transistors like 2N3055 can be used as darlington pair along
with SL100. The diodes are used to protect the transistor from transients.... |
|
Simple stepper Motor Controller - This design allows for very
precise control of the motor: by proper pulsing, it can be turned in very
accurate steps of set degree increments (for example, two-degree increments,
half-degree increments, etc.). They are used in printers, disk drives, and
other devices where precise positioning of the motor is necessary. There are
two basic types of stepper motors, unipolar steppers and bipolar
steppers....(circuit added 07/08) |
|
Simple Sump Pump Controller - Put together a sump pump controller
with two float switches and NO electronics…. [REUK - Renewable Energy UK
website] |
|
Simple Two Speed Contactor DC Motor Controller - The simplest of all
motor controllers (besides a straight on/off switch) is the contactor
controller. Aaron designed this contactor controller for use in his....
|
|
Simple two transistor circuit lights LEDs - 9-Apr-09 Issue of EDN
A previous Design Idea describes a circuit that uses an astable multivibrator
to drive an LED (Reference 1]. The circuit in Figure 1 uses a simpler
alternative approach. The circuit uses a 2N3904 NPN transistor and a 2N3906
PNP transistor, which operate as a high-gain amplifier.... [Design Idea by
Barry A Tigner, Michigan State University, East Lansing, MI] |
|
Simple Well Pump Controller - Find out how to automatically get
water from the well into a header tank…. [REUK - Renewable Energy UK website] |
|
Simple Windmill/Solar controller - Based on a TL084 op amp, this is
a easy to build controller suitable for wind and solar applications.
|
|
Single FET Controls LED Array - 04/12/01 EDN-Design Ideas
White-LED backlights are gaining acceptance because they offer higher
reliability and simpler drive circuitry than backlights based on CCFL
(cold-cathode-fluorescent-lamp] and EL (electroluminescent] technology. As a
result, white-LED backlights are increasingly common in PDAs (personal digital
assistants], cell phones, digital cameras, and other portable devices. A
design....[Design Idea by Len Sherman, Maxim Integrated Products, Sunnyvale,
CA] |
|
Single Phase Electronic Starter - Anovel Single-phase electronic
starter circuit meant for 0.5 HP and 1 HP motors, is presented. It
incorporates both over-load ….Circuit / schematic (added 02/05) |
|
Single pin controls relay, intermittent buzzer, and status LED -
9-Apr-09 Issue of EDN One pin controls relay, buzzer, and status LED for
control applications.... [Design Idea by Kartik Joshi and Manik Chugh, Netaji
Subhas Institute of Technology, Delhi, India] |
|
Single processor pin controls on/off function - 29-Apr-04 Issue of
EDN A recent Design Idea prompted me to offer the simpler solution that
I used in a recent project (Reference 1]. We needed a momentary power switch
with processor supervision. This supervision would allow the processor
to delay a power-down request from a press of the power switch until all
routines exited properly.... [Design Idea by Michael Sirkis, Radio Systems,
Logan Township, NJ] |
|
Single switch controls digital potentiometer - 7-Feb-02 Issue of EDN
The control of electronic potentiometers in most today's applications comes
from controller-generated signals. However, a significant number of
applications exist that require adjustments using manual, front-panel
controls. The circuit in Figure 1 uses one IC, one switch, and 10 discrete
components.... [Design Idea by Chuck Wojslaw and Gary M Craig, Catalyst
Semiconductor, Sunnyvale, CA] |
|
Single-Phase Induction Motor Drive - (application / block diagram
added 6/07) |
|
Single-switch controls digital potentiometer - 19-Sep-02 Issue of
EDN This Design Idea is an evolution and simplification of another (Figure 1,
Reference 1]. Replacing the three inverted-input NOR gates with their logical
equivalents, positive-input NAND gates, makes these three gate symbols
consistent with the fourth, which was drawn as a positive-input NAND gate. The
74HC132's data sheet describes the device as a quad, two-input NAND gate with
hysteresis....[Design Ideas by Jim Bach, Delphi Delco Electronics Systems,
Kokomo, IN] [Design Idea by im Bach, Delphi Delco Electronics Systems, Kokomo,
IN] |
|
Sinusoidal Control of Pmsm Motors with DSPic30f DSc - Microchip
Application Note Published 21-Dec-05 (app note added 2/06) |
|
Small Motor Speed Regulator - Reverse engineered circuit diagram of
a motor speed regulator out of a portable tape recorder containing a single
motor for all functions. This circuit works amazingly well, keeping the
motor speed constant regardless of shaft load and battery voltage. (added
2/05) [Circuit by Stepan Novotill] |
|
Small Transformer Drives Large El Panel - 03/01/96 EDN-Design Ideas
.... EDN is migrating links. This link is not verified. Search the
"title" EDN for new link. |
|
Smart switch cuts transformer turn-on current - 04/23/98 EDN-Design
Ideas Transformer-core saturation can cause inexplicable fuse blowing,
system crashes, or premature switch and relay failure. When a core saturates,
it loses its inductive characteristics; primary winding....[Note File
contains multiple circuits scroll to find this circuit.] [Design
Idea by Robert Lindsey, Hansvedt EDM, Urbana, IL] |
|
SMS remote control v2.2 - Control up to 8 devices ( On-Off or
Reset) by sending a SMS message from any mobile phone, to ericsson T10s, of
our circuit.….(design added 03/09) |
|
Soft Button Type Motor Direction Controller - This circuit can
control a small DC motor, like the one in a tape recorder. When both the
points A & B are "HIGH" Q1 and Q2 are in saturation. Hence the bases of Q3 to
Q6 are grounded. Hence Q3,Q5 are OFF and Q4,Q6 are ON . The voltages at both
the motor terminals is the same and hence the motor is OFF. Similarly when
both A and B are "LOW" the motor is OFF.... (added 10/05) |
|
Soft Start Circuit for Power Amps - Designed for (large) toroidal
transformers, limit the inrush current to a sensible value. (schematic /
Circuit design added 9/02) |
|
Soft Switching Amplifier with Tone Controls - Built around an LM380,
this amplifier includes tone controls and electronic "soft switching". The
soft switching circuitry ensures power is built up gradually eliminating the
dc thump….(schematic / Circuit design added 9/02) |
|
Soft-Start Circuit for Power Amps - This circuit requires experience
with mains wiring. Do not attempt construction unless experienced and capable.
Death or serious injury may result from incorrect wiring…(electronic circuit
added 4/05) |
|
Soft-start controller is gentle on loads - 22-Nov-01 Issue of EDN
The control circuit in Figure 1 senses a given load and automatically
soft-starts the load by synchronously adjusting the power to that load. You
can also manually adjust the power delivered to the load by controlling the
phase angle of the line voltage across the load. The phase-angle adjustment
for every ac half cycle covers 0 to 180°.... [Design Idea by Douglas Sudjian,
Resonext Communications Inc, San Jose, CA] |
|
Solar Car Array Controller Schematic - (electronic circuit added
7/03) |
|
Solar Car Brake Controller Schematic - (electronic circuit added
7/03) |
|
Solar Car Display Controller Schematic - (electronic circuit added
7/03) |
|
Solar Charged LED Utility Light - Tired of always spending money on
flashlight batteries only to have them fail just when you need them? Try this
simple circuit out. It would make an excellent science fair project. The white
LEDs are quite bright, they provide enough light to illuminate a small room at
night. The LEDs produce a nicely focused beam. You can read by the light of
this device. [G. Forrest Cook] |
|
Solar Flasher - This circuit is a single transistor flyback (Joule
Thief) circuit that features a third coil. With it, flash duration and
brightness is much enhanced, without resorting to large value capacitors. The
performance can be seen in the following Videos (on Youtube): http://www.youtube.com/watch?v=tgcYcPDbwNo....
[Design by QS] |
|
Solar-array controller needs no multiplier to maximize power -
5-Dec-08 Issue of EDN Relying on the logarithmic behavior of transistor
junctions to calculate power, this controller operates a photovoltaic array at
its maximum power point.... [Design Idea by W Stephen Woodward, Chapel Hill,
NC] |
|
Solar-powered motor runs on 10 nA - 18-Mar-04 Issue of EDN
Designs for solar-powered applications with low-duty-cycle requirements can
often rely on capacitors for energy storage in place of less reliable
batteries. Typical applications include solar positioning, telemetry
transmitters, chemical pumps, data loggers, and solar-powered toys. The
circuit in Figure 1 can run a small pager motor from the output of a small
calculator-type solar cell in near.... [Design Idea by Stepan Novotill,
Victoria, BC, Canada] |
|
Solar-powered sensor controls traffic - 26-Nov-09 Issue of EDN
A traffic-sensor post measures vehicle location and speed at an intersection,
providing an accurate, effective, inexpensive approach to monitoring traffic
flow.... [Design Idea by Larry K Baxter, Capsense, Lexington, MA] |
|
Solar-Powered Pump Motor Controller - A Discover Circuits visitor
had a problem. He needed a simple on/off controller for his solar
powered water pump. His system used two 12v 50 watt solar panels wired
in series. The power from the solar panels drove a submerged water pump.
However, during overcast skies the pump motor did not operate properly due to
the lack of power from the panel. He wanted a circuit which would turn
off power to the motor during low sun conditions. The circuit below
performs this function. A small 0.1” x 0.1” photodiode monitors the
sunlight intensity. The current from the diode is proportional to
sunlight intensity. An adjustable load resistor across the diode
converts the current into a voltage and feeds the to a voltage comparator
circuit. The output of the comparator drives a small n-channel MOSFET,
which in turn drives a high current p-channel MOSFET, controlling power to the
pump motor. When the sunlight is less than one fourth of full intensity,
power to the motor is turned off. [Circuit designed by David A. Johnson, P.E.] |
|
Solid State Relay Requires only 50uA Drive Current - This circuit
demands a control current that is 100 times smaller than that needed by a
typical optically isolated solid state relays. It is ideal for battery-powered
systems. Using a combination of a high current TRIAC and a very sensitive low
current SCR, the circuit can control about 600 watts of power to load while
providing full isolation and transient protection. Published in Electronic
Design, Dec 2, 1996. …. [Designed by David A. Johnson] |
|
Solid State Reversing Circuit - This circuit uses solid state
switching (transistors) to control direction of a DC motor. You have precise
control of the movement of the motor, and an indication of direction provided
by LED's…. [Andy Collison] |
|
SOT-23 Smbus Fan Speed Controller Extends Battery Life & Reduces Noise -
DN238 Design Notes (Linear Technology) (app note added 1/06)
|
|
Sound Controlled Flip Flop - Described here is a very inexpensive
solution to many phono-controlled applications like remote switching on, for
instance, or activating a camera, tape recorder, burglar alarms, toys, etc.
The circuit given here employs a condenser microphone as the pick-up. A
two-stage amplifier built around a quad op-amp IC LM324 offers a good gain to
enable sound pick-up upto four metres. …. (added 10/05) |
|
Speed Control - Speed Control with aSwitching rate of 15KHz (circuit
added 10/06) |
|
Speed control based on the ZN409 - Speed control based on the ZN409
|
|
Speed Control for RC Car - DC motor PWM controller that takes the1ms
to2ms pulse from the RC receiver and converts it into a PWM train at1Khz
(added 6/06) |
|
Speed Control of 3-Phase Induction Motor using PIC18 MicroControllers -
Microchip Application Note Published 2-Jul-02 (app note added 2/06)
|
|
Speed Control with Reverse - (Schematic added 10/06) |
|
Speed Controller - There are many ways of producing a PWM wave form,
it can be done with PIC’s, 555 timers, Nand gates and schmitt triggers, but
I’ve taken the easy way out by using a custom made PWM motor controller (in
kit form) and modifying it (slightly). The kit in question is from Maplin part
no (VF59P). Below....(circuit added 10/06) |
|
Speed Controller for Robot - The purpose of a motor speed controller
is to take a signal representing the demanded speed, and to drive a motor at
that speed. The controller may or may not actually measure the speed of the
motor. If it does, it is called a Feedback Speed Controller or Closed Loop
Speed Controller, if not it is called an Open Loop Speed Controller. Feedback
speed control is better, but more complicated, and may not be required for a
simple robot design.... (diagram added 10/06) |
|
Speed Measurement & Control with the AD2S83, Silicon Tachogenerator -
AN-236 Analog Devices Application Notes (app note added 6/06)
|
|
Stealth-mode LED controls itself - 5/25/06 EDN Design Ideas
Since the LED’s invention more than 30 years ago, its emission efficiency has
steadily increased, and, although it may surprise you, the increased
conversion efficiency works in two directions. Certain bright, efficient LEDs,
such as Hewlett-Packard’s (www.hp.com) HLMP-EG30-NR000, a red emitter molded
in clear encapsulation, also exhibit significant....PDF has several circuits,
you will need to scroll to find this one.... [Design Idea by Howard Myers,
Greensboro, NC] |
|
Stepdown converter uses a ceramic output capacitor - 06/07/01 EDN-Design
Ideas EDN is migrating links. This link is not verified. Search
the "title" EDN for new link. |
|
Stepper Control - ….(Circuit design added 07/08/09) |
|
Stepper Motor Control using the PIC16f684 - Microchip Application
Note Published 23-Feb-04 (app note added 2/06) |
|
Stepper Motor Controller - Stepper motor driver that will allow you
to precisely control a unipolar stepper motor through your computer's parallel
port. With a stepper motor you can build a lot of interesting gadgets such as
robots, elevator, PCB drilling mill, camera panning system, automatic fish
feeder, etc. If you have never worked with stepper motors before you will
surely have a lot of fun with this project. ….(electronic schematic added
11/08) |
|
Stepper Motor Controller - The direction of rotation is determined
by the FORWARD and REVERSE switches and the motor does not take any current
when a switch is not pressed. |
|
Stepper Motor Controller (Aaron Cake) - (electronic circuit added
4/05) |
|
Stepper Motor Controller (interg) - There are many kind of stepper
motors. Unipolar type, Bipolar type, Single-phase type, Multi-phase type.
Single-phase stepper motor….(electronic circuit added 08/08/08). |
|
Stepper Motor Controller Connection Diagrams - Four-Wire Connection
The ULN2003 / MC1413 is a 7-bit 50V 500mA TTL-input NPN darlington driver.
This is more than adequate to control a four phase unipolar stepper motor such
as the KP4M4-001. ….(Circuit design added 11/08) |
|
Stepper Motor Drive - (application / block diagram added 6/07)
|
|
Stepper Motor Driver (74194) - Probably the simplest, reversible
drive circuit is the H-Bridge. Some BEAMbots use H-bridge motor drivers; many
more use an H-bridge variant of some sort. Here's a simple….(design added
11/08) |
|
Stepper Motor Microstepping with PIC18c452 - Microchip Application
Note Published 21-Mar-02 (app note added 2/06) |
|
Stepper Motor Voltage Doubler Circuit - Double the voltage from a
stepper motor using two bridge rectifiers…. [REUK - Renewable Energy UK
website] |
|
Stepper-motor motion controller and driver fit into a CPLD/FPGA -
21-Jun-07 Issue of EDN A CPLD or FPGA can be a home for a stepper-motor
motion controller and driver.... [Design Idea by Stephan Roche, Santa Rosa,
CA] |
|
Stepping Motor Controller - Intelligent stepper motor controller
with PIC16F84. It can be controlled with PC that conncted with RS-232C. And it
can also set up acceleration value, maximum velocity and drive method.
(added 10/05) |
|
Stepping Motors Fundamentals - Microchip Application Note Published
23-Feb-04 (app note added 2/06) |
|
Stereo jack adds no-cost power/logic control - 04/15/99 Issue of EDN
Many battery-powered devices use peripherals that require only two conductors
to complete their interfaces. You can use stereo phone jacks and monaural
plugs to perform power- or logic-control functions in addition to completing
their required I/O connections. Monaural plugs short-circuit the ring and
sleeve of stereo jacks. You can place the ring connector, normally considered
a redundant ground return, into....Page includes several designs. Scroll
to find this one.... [Design Idea by Gary O’Neil, IBM Microelectronics,
Research Triangle Park, NC] |
|
Strobe Controller - Simple controller for professional stroboscopes,
adjust the flash rate in1.15 Hz range (added 4/02) |
|
Strobo Control - Remote controller for professional lighting system
stroboscope, controls the flashing speed…. [Design and copyright by Tomi
Engdahl] |
|
Stroboscope trigger circuits - This page contains some information
on circuits which can be used for triggering stroboscopes from external
circuits. The circuit here are designed to be integrate to strboscope circuits
so that they can triggered using external trigger pulse. The standard trigger
pulse used in professional stroboscope controllers is 3-10V pulse. If you
don't already have a suitable controller,... [Tomi Engdahl's design] |
|
Subscriber Line Card for Central Office Telephone Switching Equipment -
National Semiconductor Application Note (app note added 6/06)
|
|
Subscriber Line Card in a Distributed Control Switching System -
National Semiconductor Application Note (app note added 6/06)
|
|
Sump Pump Controller - Put together a sump pump controller with two
float switches and NO electronics…. [REUK - Renewable Energy UK website] |
|
Sunrise Lamp using 120VAC 60 Watt Lamp - In this circuit, a 120VAC
lamp is slowly illuminated over a approximate 20 minute period. The bridge
rectifier supplies 120 DC to the MOSFET and 60 watt lamp. A 6.2K, 5 watt
resistor and zener diode is used to drop the voltage to 12 volts DC for the
circuit power. The bridge rectifier should be rated at 200 volts and.... [Bill
Bowden's circuit] |
|
Super Bright 3v Powered LED Flasher - I have posted several kinds of
LED flashers over the years. This is yet one more flasher, designed to flash
any high power LED of any color. It hits the LED with a 25ms 250ma pulse
once every 2 seconds. This works out to an average current about 3ma. It
is powered by any 3v source. I suggest two AA cells but a single 3v
lithium coin type cell will also work. With fresh AA cells, the light
should flash for about two weeks. The light flash is very intense and is
perfect for any attention getting night time application.... [Designed by
David A. Johnson] |
|
Super Remote - Using a PIC12F683 and a few transistors, it is
theoretically possible to boost the power to a standard 433 MHz remote
transmitter module. (Note hypothetical image at right).….(electronic schematic
added 08/08) [Luhan Monat - Mesa Arizona] |
|
Super Simple Stepper Motor Controller - (electronic circuit added
10/05) |
|
Switch Machine Drivers - The circuits on this page are switch
machine drivers that can be used to operate Stall-Motor type switch machine
motors. The circuits use LM324 Quad or 358 Dual operational Amplifier chips to
provide a PUSH-PULL output to reverse the polarity of the supply to the switch
machine motors. [from Rob Paisley's Model Train web site] |
|
Switched reluctance Motor Drive - (application / block diagram added
6/07) |
|
System monitors multiple temperatures Controls Fan speed - 10/12/00
EDN-Design Ideas The block diagram in Figure 1 represents a complete
remote temperature-sensing and fancontrol system. The system uses an Analog
Devices temperature-monitor and fan-control ASIC and a PIC16C84 mC from
Microchip Technology. The ADM1022 allows you to measure....PDF contains
several circuits, scroll to this one....[David Hanrahan, Analog Devices
Inc, Limerick, Ireland] EDN is migrating links. This link is not verified.
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