Hello Guest it is October 18, 2021, 06:09:16 AM

Author Topic: Capacitor on Limit Switch  (Read 7073 times)

0 Members and 1 Guest are viewing this topic.

Offline MN300

*
  •  251 251
    • View Profile
Re: Capacitor on Limit Switch
« Reply #10 on: September 29, 2020, 11:25:01 AM »
The delay on switch opening is a few tenths of a millisecond at most. The Spice Simulation shows the switch input (yellow) and the opto current (red).

The point at which the opto output opens depends on the version of the PC817 used. Peak OPTO LED current is about 15 mA. If the turn-off point is 2 mA then the delay is 0.1mS.

Diode D10 is in the simulation to make the V1 voltage pulse generator behave like switch contact. It isolates the voltage pulse generator when low to simulate the open switch contact.

Offline Marce

*
  •  10 10
    • View Profile
Re: Capacitor on Limit Switch
« Reply #11 on: September 29, 2020, 11:51:26 AM »
Thank you very much for your kind response. And for taking all the trouble to explain it to me as well as you have done. I have nothing but one last question. Do you think that the implementation of this capacitor in this circuit can protect my breakoutboard from burning out due to overvoltages produced by the spindle?

https://youtu.be/_qTjYUyNpGs

Best regards