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DC Motor Driver with L6203: (electronic schematic added 11/06) |
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DC Motor Driver with L6204: (electronic circuit added 10/06) |
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DC Motor Driver with L6205: (electronic circuit added 10/06) |
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DC Motor Pulse Width Modulation Speed Control: This is a circuit for
controlling the speed of small DC motors, it works nicely as a speed controller for an
HO or N gauge model railroad. (electronic diagram added 11/06) |
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DC Motor Reversing Circuit #2: A DC motor reversing circuit using non
latching push button switches. Relays control forward, stop and reverse action, and
the motor cannot be switched from forward to reverse unless the stop switch is pressed
first. (added 4/02) |
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DC Motor Reversing Circuit: Electronic circuit (added 9/04) |
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DC motor speed controller: (circuit / design added 11/06) |
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DC Motor-Driver H-Bridge Circuit (circuitdb): Physical motion of some form
helps differentiate a .... (added 2/07)t from a computer. It would be nice if a motor
could be attached directly to a chip that controlled the movement. But, most chips
can't pass... |
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DC Motor-Driver H-Bridge Circuit: (electronic circuit added 2/07) |
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DC Push Button Motor Control Circuit: (electronic schematic / circuit added
4/02) |
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DC Push Button Motor Control Circuit: (schematic / circuit added 2/07) |
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DC servomotor controller: An experiment on the DC servomotor control system.
It is controlled with only an AVR. (added 10/05) |
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Delayed shutter control for Kodak DC-20: (circuit added 1/07) |
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Digital 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 5/02) |
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Digital Speed Control with Reverse: (Schematic added 11/06) |
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Digital Speed Control: Digital Speed Control with aSwitching rate of 15KHz
(circuit added 11/06) |
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Dimmer/Motor Speed Control: (electronic circuit added 7/03) |
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Discrete component motor direction controller: (electronic circuit added
10/05) |
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DMOS 3A, 55V, H-Bridge: National Semiconductor Application Note
(app note added 6/06) |
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Driving a relay with a CPU: (circuit added 2/07) |
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DS1821 programmable thermostat: (diagram added 2/07) |
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DSSSE: Dual Slope-Sampling Solar Engine: Voltage-Controlled Solar
Engine: The dual slope sensing SE is another Wilf Rigter design; this SE is
optimized for 'bots with a low-power standby mode. (added 11/05) |
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Dual Channel Servo Pulse to H-Bridge Interface (~mixos): (electronic circuit
added 2/07) |
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Dual Channel Servo Pulse to H-Bridge Interface: (circuit / schematic design
added7/06) |
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Dual DC Motor speed controllers navigate robots: 02/05/2004 EDN-Design
Ideas In low-noise analog circuits, a high-gain amplifier serves at the input to
increase the SNR. The input signal level determines the input-stage gain; low-level
signals require the highest gain. It is also standard practice in low-noise
analog-signal processing to make the circuit's bandwidth as narrow as possible to pass
only the useful input-signal spectrum. (added 10/05) |
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Dual Fan Controller: A birthday present gone too far. An overengineered
temperature-based automatic twin fan controller with brass face to keep a kitchen PC
cool. (project added 11/06) |
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Dual Slope-Sampling Solar Engine: Voltage-Controlled Solar Engine:
The dual slope sensing SE is another Wilf Rigter design; this SE is optimized for
'bots with a low-power standby mode. (added 11/05) |
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Dual Stepping motor Drivers using UDN2540: (electronic circuit added 4/05) |
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Eight Way Switcher: (Schematic / Circuit added 11/06) |
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Electronic Motor Starter: (electronic Circuit / Schematic added 10/04) |
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Engine Control Unit Schematics: (circuit / schematic design added 6/06) |
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Fan Controller Adapts to System Temperature: 09/25/97 EDN-Design Ideas /
(added 2/03) Any piece of electronic equipment--whether it be a lab instrument, an
audio amplifier, or a PC--that relies on a cooling fan to control internal temperature
is a potential source of noise pollution or even hearing damage. Most of the time, the
fan's noise level is probably much higher than necessary, because it has enough
capacity to move enough air to handle worst-case conditions. In many systems, the fan
can either be off or running slowly most of the time with no damage to the system.
Keeping the fan off or running slowly benefits you by reducing ambient noise and
possible fatigue, irritated nerves, or even hearing damage. The circuit in Figure 1
adjusts a fan's speed according to temperature.... |
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Fan timer Based on Motorola 68HC908QT2: (electronic circuit added 4/05) |
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Flashing LED-based Solar Engine: Voltage-Controlled Solar Engine:
This design uses a flashing LED to determine the solar engine's voltage trip level.
(added 11/05) |
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Four Way Switcher #2: (Electronic Schematic added 11/06) |
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Four Way Switcher: (Schematic added 11/06) |
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Four-Speed Fan Control using Simple Remote Diode Temperature Sensor:
National Semiconductor Application Note (app note added 2/06) |
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Four-transistor H-bridge: an interesting 4-transistor H-bridge variant; this
is cheap and easy to build, and best of all is "smokeless" (i.e., no combination of
inputs can cause the bridge to self-destruct). (added 11/05) |
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Frequency switch: (diagram added 2/07) |
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Fridge Saver: This circuit waits 5 minutes before re-applying the power to a
refrigerator to prevent it from having to start up under pressure after a brief power
outage. This is highly stressful for the compressor and the thermal cut-out switch
built into the compressor. This device prevents frequent brief power interruptions....
(added 10/06) |
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Full-featured Dual H-bridge: I had always assumed that dynamic braking would
be most effective at higher speeds. However, actual tests using a Faulhaber (micro mo)
gearmotor showed that the brake would hold a motor almost stationary. These gearmotors
are so well made that I can turn the 4 mm diameter shaft with light finger pressure.
For the tests I had mounted a 90 mm diameter wheel, which gave me tremendous
mechanical advantage. I found with the wheel mounted that I could barely turn the
motor against the brake. (added 11/05) |
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Gate Boost Solar Engine: Voltage-Controlled Solar Engine: The "Gate
Boost Solar Engine" is a new (6/2002) Wilf Rigter 1381-based design. This uses an
internal voltage doubler to turn on a FET more efficiently. (added 11/05) |
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Grounding for Low-and-High-Frequency Circuits: AN-345 Analog Devices
Application Note (app note added 2/06) |
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H Bridge Motor Control Circuits: (schematic / circuit added 2/07) |
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Happy Birthday Singer solar engine: Time-Controlled Solar Engine: The
original Type 2 Solar Engine was based around the "Happy Birthday Singer" (HBS) chip
that was pulled from the original Hallmark singing greeting cards. .
(added 11/05) |
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H-Bridge Direct Current Motor Control Circuits: (electronic circuit added
7/03) |
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H-Bridge motor Controller (5 amps 100 Watts): This circuit drives small DC
motors up to about 100 watts or 5 amps or 40 volts, whichever comes first. Using
bigger parts could make it more powerful. Using a real H-bridge IC makes sense for
this size of motor, but hobbyists love to do it themselves, and I thought it was about
time to show a tested H-bridge motor driver that didn't use exotic parts.... (added
4/05) |
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H-Bridge shematic: (circuit added 2/07) |
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H-Bridge Switch for Small Motors: simple switch circuit for reversing and
stopping a motor without any control of speed (added 5/02) |
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Home Built Laser Projector: Laser projector is one of the laser display
equipments. This project builds the closed-loop galvos mainly and aiming at
professional grade. (added 10/05) |
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Hot Water Tank Indicator: (diagram added 2/07) |
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Increasing the High Speed Torque of Bipolar Stepper Motors: National
Semiconductor Application Note (app note added 2/06) |
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Inexpensive Logic Controls Stepper Motor: 03/26/98 EDN-Design Ideas / (added
03/03) |
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Infrared Toy Car Motor Controller: (electronic Circuit / Schematic added
10/04) |
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Interfacing 5 Volt CMOS to 12 Volt loads: (electronic circuit added 4/05) |
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Interfacing Microchip’s Fan Speed Controllers to a SPI™: Microchip
Application Note Published 12-Nov-02 (app note added 2/06) |
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IRADK10 Motor Drive
Reference Design Kit: The kit has a Graphical User Interface (GUI) that enables
the user to control motor speed and set the basic control parameters such as PWM
frequency and shut down conditions via the serial link. (added 6/06) |
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Keys to Longer Life for CMOS: AN-349 Analog Devices Application Note
(app note added 2/06) |
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LDR light/dark activated relay switch: (diagram added 2/07) |
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Light activated relay: (diagram added 2/07) |
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Line Following Robot: This is a tiny line following robot which can run on
the desk. (added 10/05) |
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Line-powered Xenon flash transmitter (PDF): (diagram added 2/07) |
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LTC1840: I2C Fan Control Ensures Continuous System Cooling: DN270
Design Notes (Linear Technology) (app note added 1/06) |
