I have an open collector toggle signal, instead of get on/off at 24 volts and grnd, I would like to get -12v to +12v, I am not an electronics guy but with a little knowledge in the field, could anyone tell me how to do this? Great thanks in advance for any posts..
I have an open collector toggle signal, instead of get on/off at 24 volts and grnd, I would like to get -12v to +12v, I am not an electronics guy but with a little knowledge in the field, could anyone tell me how to do this? Great thanks in advance for any posts..
I have an open collector toggle signal, instead of get on/off at 24 volts and grnd, I would like to get -12v to +12v, I am not an electronics guy but with a little knowledge in the field, could anyone tell me how to do this? Great thanks in advance for any posts..
So, you have a 24V supply, an open collector output tied to the +24V via a resistor and you want this to become -12V to +12V relative to ground? What's the toggle signal hooked to? How fast does it operate? What will it be hooked to? Do you have access to any other supply rails?
In other words, can you describe the situation more completely?
I'm assuming your open collector transistor has the emitter at ground, in the middle of your +/-12 supplies. If so, then one easy solution is to connect the base of a PNP device to the open collector through a current limit resistor... try 10k for starters. Connect the emitter of the PNP to +12, and the load on the open collector can go to -12 (or gnd... anything lower than +12). If for some reason you really need an NPN open collector on -12 pulling from +12. just continue this trick and feed the PNP collector through a resistor to the base of the NPN.
Best regards,
Bob Masta dqatechATdaqartaDOTcom D A Q A R T A Data AcQuisition And Real-Time Analysis
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