The Modutronic Messmaker is a simple, lo-fi AM/FM synthesizer that runs on a 9V battery. Below is an updated version of the schematic, which removes the additional output & inputs for the sake of simplicity and slightly lower cost.
In case anyone wants it, the original version of the schematic is still available here.
Modutronic Messmaker- guided tour
“Official” demo video for the Modutronic Messmaker
Modutronic Messmaker- small, lo-fi DIY synthesizer
The Modutronic Messmaker is a lo-fi DIY synth based on an LM567 tone decoder chip and a 555 oscillator, housed in a plastic VHS tape case. See my blog for more info: http://blog.skincontact.com/?tag=modutronic-messmaker
more Modutronic Messmaker
another demo video for the Modutronic Messmaker lo-fi AM/FM synth & fx box. This one is built in a black plastic VHS tape case.
Old build notes here.