Author Topic: Remote switched relay bypass  (Read 355 times)

Buffalo Tom

Remote switched relay bypass
« on: March 16, 2019, 03:33:09 PM »
Hi. Does anyone know if I can power this circuit with 5V instead of 12V without change values on the caps and resistors?
I have a 5V 4PDT relay I wanna use. Its for a stereo ab box with LED.




Mark Hammer

Re: Remote switched relay bypass
« Reply #1 on: March 16, 2019, 07:30:17 PM »
Yes.  AFAIK, the circuit drawn (which IS 20 years old, or so) just assumes use of a 12V relay.  You may have to adjust the value of R3 to get the LED bright enough for your liking.

Buffalo Tom

Re: Remote switched relay bypass
« Reply #2 on: March 17, 2019, 06:30:04 AM »
Yes.  AFAIK, the circuit drawn (which IS 20 years old, or so) just assumes use of a 12V relay.  You may have to adjust the value of R3 to get the LED bright enough for your liking.

Thanks!

Buffalo Tom

Re: Remote switched relay bypass
« Reply #3 on: March 22, 2019, 03:22:28 PM »
Yes.  AFAIK, the circuit drawn (which IS 20 years old, or so) just assumes use of a 12V relay.  You may have to adjust the value of R3 to get the LED bright enough for your liking.

Hi.

I just built the circuit using Omron G5V-2 5DC. DPDT Non-Latching Relay.
https://docs-emea.rs-online.com/webdocs/00b6/0900766b800b6d76.pdf

The relay turns on but there is one thing that confuses me. Im using a 78L05 voltage regulator to get 5V for the circuit. I have 5V after the regulator but I only have 3V over the relay coil when energized. Is this normal or is there something wrong? My bench power supply is 9V 100mA.

Thanks



« Last Edit: March 22, 2019, 04:09:53 PM by Buffalo Tom »