Whats the best way to send a signal down 60' of wire?
GICU812
Posts: 289
I have a device, it has 2 pins, and 2 signals (its a garage door opener for what its worth.
There is approxamately 16 volts when the circuit is working, but if you remove the switch module, its 22v, so I need to be able to cope with up to 25v
From taking apart the switch, Ive determined how it sees the diffrent signals.
Signal A: Short pin 1 to pin 2
Signal B: Connect pin 1 and 2 with a 1uf cap
I have a BS2 about 60' (by the wire) away. What is the best way to send a signal?
I was thinking of having 2 relays at the opener, one for each signal, then two PNP transistors to fire the relays.
I guess my question is, where should I have the transistors, at the opener, or at the stamp?
It would be one less wire to use if I had them at the stamp, and I think the stronger 12 volt signal (relay activation signal) would travel better than the 5v logic signal.
Or am I going about this all wrong with relays, would you reccomed just using transistors instead?
Im assuming the 1uf cap just allows power to flow for a brief instant, so could I just use one relay\circuit and pulse it briefly to immitate that, or am I thinking wrong?
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There is approxamately 16 volts when the circuit is working, but if you remove the switch module, its 22v, so I need to be able to cope with up to 25v
From taking apart the switch, Ive determined how it sees the diffrent signals.
Signal A: Short pin 1 to pin 2
Signal B: Connect pin 1 and 2 with a 1uf cap
I have a BS2 about 60' (by the wire) away. What is the best way to send a signal?
I was thinking of having 2 relays at the opener, one for each signal, then two PNP transistors to fire the relays.
I guess my question is, where should I have the transistors, at the opener, or at the stamp?
It would be one less wire to use if I had them at the stamp, and I think the stronger 12 volt signal (relay activation signal) would travel better than the 5v logic signal.
Or am I going about this all wrong with relays, would you reccomed just using transistors instead?
Im assuming the 1uf cap just allows power to flow for a brief instant, so could I just use one relay\circuit and pulse it briefly to immitate that, or am I thinking wrong?
·
Comments
or twisted pair but i think twisted pair works the best
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If you just want to toggle a 25v line on and off, that is a different animal. To handle the 25V at the end of the line, use a rely to isolate it from your microprocessor. Relays always isolate a jump in voltage or a change from DC to AC, so they certainly are a good choice. Transistors or optoisolators may seem more 'high tech', but at times they just don't work at well.
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