Hi there,
I plan to use a resistor based voltage divider to drive a AD converter input circuit. The input can take 3.5VAC max.
The divider works just fine as it doesn't fluctuate after many hours hooked up to a multimeter. The problem arose when I tried to drive the input circuit. Since it's based on 5vdc, one of the coupling capacitors on the 7805 did not like seeing the neutral coming from the original AC load at all and showed its displeasure by self destructing.
Does anyone know of a way to isolate the neutral from the divider?
Unfortunately, I can't provide any info about the input circuit since the demo boards we have are all potted.
Thanks for any help you can provide. Let me know if I'm omitting any details.
I plan to use a resistor based voltage divider to drive a AD converter input circuit. The input can take 3.5VAC max.
The divider works just fine as it doesn't fluctuate after many hours hooked up to a multimeter. The problem arose when I tried to drive the input circuit. Since it's based on 5vdc, one of the coupling capacitors on the 7805 did not like seeing the neutral coming from the original AC load at all and showed its displeasure by self destructing.
Does anyone know of a way to isolate the neutral from the divider?
Unfortunately, I can't provide any info about the input circuit since the demo boards we have are all potted.
Thanks for any help you can provide. Let me know if I'm omitting any details.