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| What Type Of Resistor Is Needed? |
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| lettuce:
What type of resistor will i need if i want to get a 12v current down to a 5v? I want to connect my credit board up to my I-PAC, but the credit requires a 12v supply, so i need to add a resistor to the wire that is connected to the I-PAC and the pulse input on the Credit Board, to get the 12v down to a 5v so it doesnt fry the I-PAC |
| Angry_Radish:
I'd use a voltage regulator, not a resistor. They are quite cheap at radioshack and other electronics stores. :cheers: |
| BobA:
You need to invert the signal as well as isolate 12V from 5V. The ipac needs a ground to indicate a contact closure. Use an NPN transistor and a 1000 ohm 1/4 watt resistor to make the following. |
| lettuce:
I only have a very basic skill in wiring and soldering. Can you use simpleton terms by any chance? |
| Angry_Radish:
Doh, missed the pulse bit, tnx :cheers: --- Quote from: BobA on July 15, 2007, 09:54:49 am ---You need to invert the signal as well as isolate 12V from 5V. The ipac needs a ground to indicate a contact closure. Use an NPN transistor and a 1000 ohm 1/4 watt resistor to make the following. --- End quote --- |
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