Hello,
I apologize if this question is answered elsewhere on the forums, and thank you in advance for any suggestions and help.
I have a mixer board in our radio station that has a "Tally" out - it will output 5 Volts DC when the microphone is on, and 0V when it is off. (max current = 30mA - actually the manual says "do not draw more than 30mA"!)
I would like to use this 5V signal to turn on some light bulbs using some relays already wired in our wiring closet. I think the relays have 12V coils (~100mA to throw if I remember correctly), 4-poles, and they are set to connect the lightbulbs to -12V and +12V (providing a total voltage across the lightbulbs of 24V) from a nearby supply. We confirmed that the bulbs do light when the relay is flipped - now I just need to flip the relay using this digital signal (30mA is too small, and I didn't want to try to fear of burning out the microphone's mixing board module).
How can I make the light bulb turn on with the 24 VDC source when the Tally signal turns on to 5 Volts?
Any help would be greatly appreciated! Either simple transistor/relay/amp circuits I can build, or a part I can just purchase. I fact, I'm not even sure of what I'm looking for here - I was looking at "DC to DC converters" for a while, but am not sure if that's what I need. It originally sounded to me like I just need a single transistor circuit (I'd have to use some schematic to bias it up), but figured a commercial option may provide more protections to the board circuitry...
fyi, I can use the nearby +/- 12V DC and +/- 5V DC supplies to boost the 5V signal.
Thanks!
I apologize if this question is answered elsewhere on the forums, and thank you in advance for any suggestions and help.
I have a mixer board in our radio station that has a "Tally" out - it will output 5 Volts DC when the microphone is on, and 0V when it is off. (max current = 30mA - actually the manual says "do not draw more than 30mA"!)
I would like to use this 5V signal to turn on some light bulbs using some relays already wired in our wiring closet. I think the relays have 12V coils (~100mA to throw if I remember correctly), 4-poles, and they are set to connect the lightbulbs to -12V and +12V (providing a total voltage across the lightbulbs of 24V) from a nearby supply. We confirmed that the bulbs do light when the relay is flipped - now I just need to flip the relay using this digital signal (30mA is too small, and I didn't want to try to fear of burning out the microphone's mixing board module).
How can I make the light bulb turn on with the 24 VDC source when the Tally signal turns on to 5 Volts?
Any help would be greatly appreciated! Either simple transistor/relay/amp circuits I can build, or a part I can just purchase. I fact, I'm not even sure of what I'm looking for here - I was looking at "DC to DC converters" for a while, but am not sure if that's what I need. It originally sounded to me like I just need a single transistor circuit (I'd have to use some schematic to bias it up), but figured a commercial option may provide more protections to the board circuitry...
fyi, I can use the nearby +/- 12V DC and +/- 5V DC supplies to boost the 5V signal.
Thanks!
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