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Digital Thumbwheel Switch - ….must register on this site....
[Published in Elecktor July/August 2010] |
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Digital Timer has Independent on/Off Periods - 03/28/96
EDN-Design Ideas.....You can easily implement a long-interval digital
timer using the popular 4060 oscillator-divider IC. However, in
repetitive-timer applications, this IC produces equal on and off
times..... [Design Idea by Sanjay R Chendvankar, Tata Institute of
Fundamental Research, Bombay, India] |
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Digital timer light switch - Typical circuit representative of
those used in most light switch type digital timers. The timer module is
normally a PIC or custom chip, and it syncs to the AC line so that a
trigger pulse can be supplied at the right moment….schematic only….
[Reverse engineered schematic by Stepan Novotill] |
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Digital to Analog Centronics D/A & Filter - (design circuit
added 8/02) |
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Digital to Analogue Converters for PC Parallel Port -
(electronic schematic / circuit added 11/05) |
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Digital TV CRT - (application / block diagram added 6/07)
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Digital TV LCD - (application / block diagram added 6/07) |
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Digital variable resistor compensates voltage regulator - 9-Jul-09 Issue of
EDN A look-up table compensates for temperature drift..... [Design Idea by Jason
Andrews, Maxim Integrated Products Inc, Dallas, TX] |
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Digital VGA Switch - Digital VGA switch for switching between two PC
monitors with MAX465 IC. ….(electronic schematic added 11/08) |
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Digital Video Processor - (diagram added 8/03) |
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Digital Voice Recorder ISD2560 - This project is based on ISD2560P IC which
allows us to record 60 seconds voice and playback it with very high quality. As shown
in the schematic, we input the voice by using an electret microphone. If a dynamic
microphone is used, R2,R3,R4…(circuit added 6/07) |
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Digital Volt & Amp Meter with Temperature Control - This project was
designed and constructed as enhancement to the 0-30V Stabilized Power Supply Project
with the DIY electronics hobbyist in mind. The circuit uses a single PIC Microchip to
perform the Voltage, Current and Temperature conversions and display functions. The
PCB Board uses large …..... |
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Digital Volt Meter with Video Output - (circuit / schematic design added
6/06) |
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Digital voltmeter - Schematic only, no circuit description |
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Digital Volume Control - This circuit could be used for replacing your
manual volume control in a stereo amplifier. In this circuit, push-to-on switch S1
controls the forward (volume increase) operation of both channels while a similar
switch S2 controls…(circuit added 6/07) |
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Digital volume control (Aaron Cake) - (circuit diagram added 1/07)
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Digital volume control has log taper - 11-Apr-02 Issue of EDN Digital
potentiometers provide a compact and convenient way to attenuate audio-amplifier
signals. However, most such potentiometers suffer from at least one flaw a
nonlogarithmic step increment. To avoid this problem, a user must usually step the
potentiometer in a nonlinear sequence to simulate a logarithmic taper..... [Design
Idea by Doug Farrar, Los Altos, CA] |
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Digital Wattmeter - The extra input B is for a later SWR brigde project,
also the TX serial output will be in use later. The uncalibrated signal response is:
+1/-1 dB from 1MHz to 450MHz. Input SWR vill varry from 1.00 to 1.30, depending on
input frequency. To make the SWR this good, you need to assemble the input circuit
correct and adjust the capasitor. Input power range: -60 to +30dBm that is 1 nW to 1
Watt. …..... |
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Digital waveform generator provides flexible frequency tuning for sensor measurement
- 17-Dec-04 Issue of EDN Variable-resistance sensors convert a fixed dc
excitation voltage or current into a current or voltage that's a straightforward
function of the quantity undergoing measurement. In another class of sensors, moving
objects or fluids produce a sensor signal by altering an LC circuit's inductance or
capacitance..... [Design Idea by Colm Slattery, Analog Devices, Limerick, Ireland] |
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Digital wireless for the bench top ATtiny12 - This section describes
an experimental low power, low bandwidth data signaling system that was initially made
to operate at 55 MHz (television channel 2 in the U.S.). Before operating a radio
transmitter, find out what kind of transmitter operation, if any, is permitted in your
locality. Radio transmitter operation is a serious legal matter. This
design..... |
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Digital/Standard Phone Line Tester - ASCII format Radio Shack sells a
similar device without the high current function. It detects one or two lines on an
RJ-11 and tells you its polarity. It costs $6. (Circuit design added 10/06) jun
21, 2006 |
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Digital-I/O circuit adapts to many interface voltages - 03/01/07 EDN-Design
Ideas Control newer logic families that can't tolerate 5V… [Design Idea by Steve
Hageman, Windsor, CA] |
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Digitally Addressable DALI Dimming Ballast - (circuit / schematic design
added 6/06) |
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Digitally Addressable DALI Dimming Ballast App. - Microchip Application Note
Published 10-Apr-02.....[App Note] |
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