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Controllers and timers - list of circuit diagrams
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A versaile output interface that can control external devices direct from your computer
author: Andy Collinson visits: 997 
design is based on an active filter, centered at 37KHz modulating frequency and uses a photodiode and op-amp from Texas Instruments.
author: Guy Bocquillon, France visits: 570 
This is a battery powered IR Link which may be used in more than one room
author: Ron J visits: 354 
It has the ability to control up to 8 pads through a 6 core cable
author: Matthew Hewson visits: 209 
This is a single channel (on / off) universal switch that may be used with any Infra Red remote control using 36-38kHz
author: Andy Collinson visits: 202 
A circuit to extract and measure the modulated carrier of an Infra Red remote control
author: Andy Collinson visits: 154 
These circuits are electrical, only switches and contacts are involved
author: visits: 149 
This circuit is a modified version of an original interface on QSL Net. It is a fully isolated interface allowing computer control of the Trio/Kenwood R5000 receiver
author: Andy Collinson visits: 142 
This is a circuit intended to be used in basketball shot clock
author: Milardo de Guzman visits: 25
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