Sequencer for Analog Music Synthesizers
One goal was to make the unit less expensive and easier to build by using a microcontroller and a 14-bit DAC together with a single encoder to make adjustments. This also makes implementing new features and modes much easier, since it's software instead of hardware. There are still a lot of switches and LED's to wire up, as you can see in this picture of the underside:
This is something that I am still fine-tuning and would like to get some other people to use and comment on. I have two blank PC boards (3.8"x2.5"), identical to the one in the above photo (but blank), available for $30 each, which includes a programmed PIC chip and shipping to USA addresses. Nothing else is provided, so you would need some kind of case, a 12VDC 500 mA AC adapter, a bunch of LED's, toggle switches, pushbutton switches and 1/4" jacks.
Here are the schematics of the sequencer:
Here is a recording made with my minimoog clone, using this sequencer. It demonstrates the stutter feature. The external control voltage is added to the keyboard voltage, so I was pressing keys to move the pitch up and down while feeding in a sequence that simply repeated.
DISCLAIMER: I take no responsibility whatsoever for the use and/or implementation thereof, or the misuse leading to damage to equipment, property, or life, caused by the above circuits.
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