I was wanting to add a on/off switch to the little ruby- i assume this would be a spst? and where would i connects those leads? :)
You can use the spst to break the +9V supply.
when i made my little gem, i put a mini spdt switch to the hot wire from the battery/adapter.. then added a resistor and a led. ..if that helps :lol: i even used a wrong resistor.. the led is too dim and i always forget to turn off the amp :twisted:
Change the resistor to a lower value and the LED will be a lot brighter. 8)