:-|
Hello all,
I’ve been working on a problem for a few days now, and had little success.
I have a timer with 3-24VAC output signals.
I need to send each signal to a 5VDC XOR gate.
What I did was to send each signal to full wave bridge rectifier (with load resistor-3.9K and 10Uf cap) and then to a 5V regulator and everything worked just fine.
The problem arose when I connected the grounds of each of the 3 rectifier circuits together. The scope shows an AC signal on the DC output, when the (AC)timer is off (BAD!), and 5VDC when the (AC) timer is on (GOOD!).
I would like to know if anyone could either suggest a better way to do this, or suggest a solution how to filter the unwanted AC.
Many thanks.