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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 6/06) |
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Dual Stepper Motor Driver for a Robot Differential Drive - This
article describes the hardware and the software used to control two stepper
motors suitable for a robot differential drive.The circuit accepts two 2-bit
words that command each of the motors to go forward, backward, hold a
position, or to idle. It also provides an output signal when a step is being
taken. It is a flexible design allowing for unipolar and bipolar motors....
[Author: J.- L. (John) Girard] |
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Economical Pump Controller - Having a reliable system to pump out a
sump pit is essential as mistakes and failures can lead to serious flooding
and enormous expense. In our article Sump Pump Control System we introduced a
selection of electronic solutions to the following problems.... [REUK -
Renewable Energy UK website] |
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Eight Channel Eight Bit PWM Controller - National Semiconductor
Application Note (app note added 6/06) |
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Eight Way Switcher - (Schematic / Circuit added 10/06) |
[ad-smSQ.htm]
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Eight-function remote uses one button, no microcode - 15-Dec-09
Issue of EDN Simplify the operation of a remote control.... [Design Idea
by Jay Davis, Boeing Integrated Defense Systems, Wichita, KS] |
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Electric Curtains Control - This hybrid circuit uses a mixture of
transistors, an IC and a relay and is used to automatically open or close a
pair of curtains. Using switch S3 also allows manual control, allowing for
curtains to be left only partially open or closed. The circuit controls a
motor which is attached to a simple pulley mechanism, to move the curtains. I
first started this circuit over 20....(added 11/05) |
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Electric Power Controller - suitable as dimmer for100-Volt lamp up
to1200W (app note added 6/06) |
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Electrical Equipment Control using PC - (electronic Circuit /
Schematic added 10/04) |
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Electronic Church Bell Controller - This circuit is a church bell
controller. Basic component is an ATmega32 microcontroller. At the circuit 2
24LC32 eeprom memories is being used, the 1st for internal standard melodies
and the 2nd one is for user's compositions. This feature will be
provided in the future.... |
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Electronic Door Release - This circuit is designed to operate an
electrical door-release mechanism, but it will have other applications. When
you enter the four-digit code of your choice, the relay will energize for a
preset time period. Use the relay contacts to power the release mechanism. The
standby current is virtually zero, so battery power is a realistic option.
[Circuit designed by Ron J.] |
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Electronic Door Release - The IC is a quad 2 input "AND" gate, a
CMOS 4081. These gates only produce a HIGH output, when BOTH the inputs are
HIGH. When the key wired to 'E' is pressed, current through R1 and D1 switchs
Q5 on.The relay energises; and Q5 is 'latched on' by R8. Thus, the Alarm is
set by pressing a single key,say one of the two non-numeric symbols.... [Ron
J.'s circuit |
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Electronic Fluorescent Lamp Ballast - International Rectifier
application note in PDF format (added 4/02) |
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Electronic Keypad - The IC is a quad 2 input "AND" gate, a CMOS
4081. These gates only produce a HIGH output, when BOTH the inputs are HIGH.
When the key wired to 'E' is pressed, current through R1 and D1 switchs Q5
on.The relay energises; and Q5 is 'latched on' by R8. Thus, the Alarm is set
by pressing a single key,say one of the two non-numeric symbols....(electronic
design added 9/02) |
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Electronic Load Controller for microhydro system - A key component
of small water turbine installations. [Manfred Mornhinweg] |
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Electronic Motor Starter - (circuit / schematic design added 6/06)
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Electronic SPDT controls two PC's - 09/02/99 EDN-Design Ideas....EDN
is migrating links. This link is not verified. Search the "title" + "EDN"
for new link. |
