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Tri-Waveform Generator - The Tri-Waveform Generator can be used for a number of different uses. The one that I use it
for is a signal generator to test circuits. The frequency range is 20 to 20khz. and can be adjusted by R1. The
duty cycle or the time that the waveform is. . . . [Randy Linscott]
TV /VCR Remote Range
Extender Circuit - I often get frustrated by how poor
some infrared remotes in many new electronic devices operate. I used to be able to turn on the TV from 30 feet
away. Now, it seems that I have to get within 15 feet. To address this issue, I designed the circuit shown below.
The circuit taps into the TV remote’s existing infrared LED and drives 8 more efficient devices. The result is a
communications range some 4 to 5 times longer. . . . [Circuit by David Johnson P.E., 10/05/05]
TV-VCR Light
Source 40Khz Repeater - This circuit is designed to be
placed directly in front of a standard TV or VCR remote. The exiting light pulses produced by the circuit match
the pulses from the remote but are about 10 times more powerful . . . [Hobby Circuit designed by Dave Johnson
P.E., 06/04/00]
Unidirectional RF wireless transmitting
and receiving - This is a very simple Wireless RF
transmitter circuit that consists of the Holtek HT-12E encoder chip and AM 418MHZ-transmitter module(WZ-X01,
other similar device can be used). Using the hybrid RF xmit/receive modules make building the RF remote control a
lot easy. . .
Universal Infrared Controller
for a PC - This simple circuit allows you to record any
Infrared remote control signal on your PC, and then play it back. This is particularly useful if you want to
control appliances such as TVs, VCRs, CDs etc. from your computer. The device simply connects to the parallel
port of your PC. This circuit was originally published in Electronics Australia, September1998 . . .
[shaunwilson19 AT yahoo.com]
Universal Infrared Receiver - I think you know what's a
UIR so IF it isn't so go to TIES BOS page and learn something :-) . ! Briefly it's an Infrared receiver which
communicated with your pc to command many windows application, so once you have built the interface, programmed
the pic16f84 with the code and connected everything to your serial com2 you'll be able to command your pc
applications through your TV or VCR remote !. . . [designer identified as Alfred73]
Universal IR Remote Control Tester - This tester consists of two integrated remote control receivers whose outputs drive an LED
to indicate when a suitable infrared signal is received. To cover all current infrared remote controls, one
receiver (the TSOP1736) has maximum sensitivity to carriers at 36 kHz, the other (the TSOP1738) to carriers at 38
kHzmust register on this site. . . [Published in Elecktor July/Augu, 2010]
Universal Serial
Infrared Receiver - Infrared based electronic circuit
diagrams / circuit schematics. . .
Use Color Film
Negative to Make An Optical Filter - This isn’t an
electronic circuit but the file shows the curve for an optical filter made from exposed color film. The material
blocks most visible light but is very transparent to 880nM infrared light. Kodak 100ASA is exposed to "cool
white" fluorescent light for about 5 seconds . . . [Hobby Circuit designed by Dave Johnson P.E., 01/01/98]
Using the MCP2120 for Infrared Communications - Application Note Published 4-Jun-01. . . [Microchip]
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