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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: 5312 
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: 2124 
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: 1998 
It has the ability to control up to 8 pads through a 6 core cable
author: Matthew Hewson visits: 1818 
This is a battery powered IR Link which may be used in more than one room
author: Ron J visits: 1338 
A 555 pulse generator circuit with a difference, the initial pulse is tailored by additional circuitry to match the duration of subsequent pulses
author: Miroslav Adzic - Serbia visits: 1113 
This is a circuit intended to be used in basketball shot clock
author: Milardo de Guzman visits: 915 
These circuits are electrical, only switches and contacts are involved
author: visits: 885 
A circuit to extract and measure the modulated carrier of an Infra Red remote control
author: Andy Collinson visits: 866
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