I just put together a Junior Theremin v1.1 kit, attached a 9v battery, got two beeps, four red LEDs blinked twice and…… nothing. If I push the two buttons at once I get two beeps and LED 2 and 4 blink twice weakly. I am bummed. Thoughts?
I also have a v1.1 kit, and after building it had a very similar response with the kit. IC’s are in correctly, but I suspect IC2 wasn’t programmed properly or didn’t accept the programming. We bought another kit and hopefully that will work, building it now.