On this model I added a touch panel which can be used to trigger sounds and glitch effects simply by placing your fingers on the touch points. I designed and burned to circuit boards with a Speak&Spell logo as well as an arrow pointed pitch control touch pad. Touching the word “Speak” turns the unit on. “Spell” triggers a random letter. “&” triggers glitched blip sounds. The three touch pads to the right are all variations of a hold/distortion effect. This is by far the coolest effect I’ve found in a Speak&Spell in a long time!
Read the schematic below to see how it’s done. It’s easy!
In order to build this thing I had to do quite a bit of bread boarding to figure out how to make it all work. It ended up being an enormous pain to keep flipping the unit over to press the touch pad, then flip it again to work on the circuit. So I built a rotating harness from a few pieces of wood and a lazy suzan. It worked great! The bread board sat below the Speak on the turn table. Everything stayed together and I was easily able to turn the whole thing back and forth to work on it.