Coleco Talking Teacher

When I originally bent this I only included a pitch knob, body contacts, and about 8 glitch switches. Which was okay, but I had seen schematics online that had used more. So I decided to take a second look. I used some stuff from a few things I've seen online and some other stuff I poked out myself.

Without further dudes...

From top to bottom, left to right...

• 1/4" Output Jack
• 5PDT Rotary Potentiometer Glitch Selector
• Distortion Knob
• Tone Momentary Push Button
• 2 Glitch ON/OFF Switches, connected to rotary switch
• Long Glitch Knob
• Hold Switch and Audition Button

Just like above...

• Pitch Photocell
• Photocell ON/OFF Switch
• Coarse Pitch Knob
• Fine Pitch Knob
• Barely Visible Reset Button

Originally, I just removed the pitch trimpot and replaced it with a 100k pot. The pitch range was okay but removing the resistor next to the trimpot really opens up the range. You have you replace it with a jumper wire though. I used a 500k pot for the coarse knob and a 50k pot for the fine pitch. You could just split the difference and use a trimpot if you want. You could probably just leave the original trimpot and just remove the resistor, but I lost it after I removed it the first time.

Here is the inside and a diagram of the bends...

You can see I had to remove ribbon cable to the LCD screen because it broke. I had to rewire it and it was a pain. The ribbon cable is really finnicky so you have to be careful with it.

  

Its kind of a sloppy mess but oh well. You can see the jumper wire used when I removed the pitch resistor. The three black wires on the left are for the body contacts.

Here's a video...