Bypass circuit DPDT using H11F1 optocoupler

[Ice-9]

Ok so it's not a new idea as it has been used in many pedals to get what I would describe as "Almost TB and LED using DPDT" Here is a little circuit I have been messing around with and have had good results. I decided to go this route on an effect that needed stereo outs because I didn't want to use 4PDT or relays for bypass.

Anyway here is a hand scribled schematic of the circuit if anyone wants to mess around with the idea. H11F1 optocouplers are still available in the UK through RS components at about 80p each.

[Ice-9]

Ok so it's not a new idea as it has been used in many pedals to get what I would describe as "Almost TB and LED using DPDT" Here is a little circuit I have been messing around with and have had good results. I decided to go this route on an effect that needed stereo outs because I didn't want to use 4PDT or relays for bypass and with this was able to use a 3PDT for stereo TB.

Anyway here is a hand scribled schematic of the circuit if anyone wants to mess around with the idea. H11F1 optocouplers are still available in the UK through RS components at about 80p each.

[gtr2]

Like this  but no transistor necessary.  I've got an interest thread over at madbeans for them.

Josh

[R.G.]

Clinton Bypass

geofex.com, Technology of Bypasses

[Ice-9]

The voodoo labs bypass uses the the no transistor circuit as well but I used the transistor so that the indicator diode current does not go through the optocoupler maybe adding noise , right or wrong i'm not sure.

R.G. I was aware of the Clinton and Millenium info at your Geofex site but thought it was worth saying it again on this forum. (which is why I said it was not a new idea)