A simple Relay Bypass

[JonesXavier]

so when i first fired up the circuit it was immediately apparent that my layout (above) had the bypass/active routing backwards (LED on in bypass).

revised layout (for 12V circuit, 520R/9V coil):
View attachment 57902

verified
View attachment 57901
fitted it to a CE-2 build running @ 12V. was quite a squeeze.
but it works!
it's an awesome switch. i love it.
thanks for sharing this circuit @Chuck D. Bones

Nice! Congrats! I Have 2 relays here, are OMRON G6S-2 4,5 VDC

I looked for this information in the datasheets but I didn't know how to interpret it. Do you know if I can use this Omron G6s-2 relay in this layout you posted? Or some appropriate layout? The ones I've tried so far have had a very loud pop! Thank you very much for your attention! Brazilian greetings!

 

[Chuck D. Bones]

That relay will draw 31mA coil current, which is pushing the limits of the 555's drive capability if you power the 555 from 5V. You get a little bit of margin if you power the 555 with 9V. Or you could go with the MOSFET drive option, then you have no issues driving the relay. Omron says the coil is polarity-sensitive, so make sure pin 1 goes to the +5V rail.

I do not know why you are getting a loud pop, that is not normal. Is the pop sound coming from your speaker or from the relay itself?

 

[owlexifry]

View attachment 75846

Do you know if I can use this Omron G6s-2 relay in this layout you posted?

as @Chuck D. Bones has pointed out, it appears this relay is polarity sensitive.
unfortunately it doesn’t look like this relay will work with this layout because the + supply will end up on pin 12 instead of pin 1.

 

[temol]

New layout.