Direct way of signal through the box (True-Bypass) or switching to the loops – LED indication.
- Hammond Box
- 3PDT switch
- S4 SNS mono Jack Sockets
- 9V battery clip + battery holder Keystone + GP battery
- DC power conector
- LED + resistors + sleeves
- 3M bump-on
No forum threads about this effect yet.
Here's some code to post a link with image on forums, eBay, websites,...