Hi.
I need some advice. I have an EDM setup.. On the electrode there is a ~120VDC PWM open-voltage signal...
Across it there is a voltage divider.. to throttle down the voltage to 5V max..
Though I am worrisome about voltage spikes ruining my arduino board. How should I tackle this?
1. Op-amp? (I dislike op-amps because of the need of dual-supply)
2. Transil?
In my current setup I use an LM339 to do the comparing of the signal? Would it be safe to assume that this signal is ok for a PICs analog input?
Regards
Franz
I need some advice. I have an EDM setup.. On the electrode there is a ~120VDC PWM open-voltage signal...
Across it there is a voltage divider.. to throttle down the voltage to 5V max..
Though I am worrisome about voltage spikes ruining my arduino board. How should I tackle this?
1. Op-amp? (I dislike op-amps because of the need of dual-supply)
2. Transil?
In my current setup I use an LM339 to do the comparing of the signal? Would it be safe to assume that this signal is ok for a PICs analog input?
Regards
Franz