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.
“Official” demo video for the Modutronic Messmaker
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
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.