{"id":1288,"date":"2017-10-08T17:03:51","date_gmt":"2017-10-08T17:03:51","guid":{"rendered":"http:\/\/stompville.co.uk\/?p=1288"},"modified":"2020-10-11T11:43:28","modified_gmt":"2020-10-11T11:43:28","slug":"ab-switcher-with-true-bypass","status":"publish","type":"post","link":"https:\/\/stompville.co.uk\/?p=1288","title":{"rendered":"A-B Switcher with true bypass"},"content":{"rendered":"

Update: Kits now available in the shop here<\/a>.<\/strong><\/p>\n

Update: Carsten posted a YouTube video here<\/a>.<\/strong><\/p>\n

Carsten M\u00f8ller of M\u00f8ller Mod<\/a> in Denmark got in touch to enquire about modifying the Stompville True Bypass Relay<\/a> project to make an A-B switcher. After a few emails and some discussion, we agreed on a specification and we present the latest Stompville project: An A-B Switcher with two relays to facilitate true overall bypass and selection of A or B effect when not in bypass mode. Carsten initially intends to use the board to make a dual-channel drive pedal. We discussed different ways of achieving this:<\/p>\n

\"260SV\"<\/a><\/p>\n

You can see that the different topologies give different options for what may be selected. We chose option 2 because when the effect is in bypass, the signal is only passing through one relay.<\/p>\n

Our design has two stomp switches and two relays. We will refer to the switches as A<\/em> and B<\/em> and the relays as the bypass<\/em> relay and the select<\/em> relay. The relays are latching and have a reset<\/em> (NC) position and a set<\/em> (NO) position.<\/p>\n