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DIY Stompboxes => Building your own stompbox => Topic started by: patrick398 on April 17, 2020, 08:43:01 AM

Title: Relay bypass LED functions backwards
Post by: patrick398 on April 17, 2020, 08:43:01 AM
Just got some PCBs back and seems i have routed the ins and out for the relay backwards which means the LED now lights when in bypass and not when effect is engaged. I've been thinking about this for a while and i can't see a simple way around this, am i being stupid? Is there a fix that doesn't require trace cutting and jumpers?


(https://i.postimg.cc/8s1NwqS8/Screenshot-2020-04-17-at-13-40-33.png) (https://postimg.cc/8s1NwqS8)
Title: Re: Relay bypass LED functions backwards
Post by: patrick398 on April 17, 2020, 10:36:13 AM
I've lifted the side of the 2k2 reisistor which goes to ground and instead tied it to +9v, now with the LED flipped it works as it should.
Am i at risk of damaging anything though? I can't see how but i'd rather double check

Cheers
Title: Re: Relay bypass LED functions backwards
Post by: duck_arse on April 17, 2020, 11:07:32 AM
it's a standard config for the 555, so you should be oakie doakie.
Title: Re: Relay bypass LED functions backwards
Post by: antonis on April 17, 2020, 12:25:57 PM
Quote from: duck_arse on April 17, 2020, 11:07:32 AM
you should be oakie doakie.

In English, plz..
('cause it's all Greek to me..)
Title: Re: Relay bypass LED functions backwards
Post by: Digital Larry on April 17, 2020, 12:28:59 PM
oakie doakie = OK
Title: Re: Relay bypass LED functions backwards
Post by: Ice-9 on April 17, 2020, 05:06:08 PM
or even 'Oki Doki'   ;D ;D
Title: Re: Relay bypass LED functions backwards
Post by: patrick398 on April 17, 2020, 05:09:14 PM
But definitely not hokey cokey
Title: Re: Relay bypass LED functions backwards
Post by: duck_arse on April 18, 2020, 11:41:23 AM
no wuckin furries, mate.