So with a lower voltage drop there's more throw on the potmeter. Because of the 0.6 to 0.7 Volt voltage drop over the silicone diodes, the first section of the potmeters wouldn't do anything until you get above 0.6 volts. This means you can get deeper tones from the VCO you plug it into. They only have a voltage drop of 0.2V instead of the 0.6 to 0.7 Voltage drop over 1N4148 diodes usually found in sequencers like this. Use Schottky Diodes on the wipers of the potmeters. Look carefully at the layout! If you want to include switches to mute individual channels then put them in series with the diode!
You can get away with using a 100nF cap or leaving it out completely.īe careful when you wire this up, note that the jumper (or wire bridge) for output 5 is connected to pin 10 of the chip so the left bunch of jumpers skips a copper trace at output 5. The layout has an extra 10♟ electrolytic capacitor on the output of the voltage regulator that is not on the schematic. The CV output signal goes straight into a VCO. It will work fine without them because we hardly draw any current from these outputs. I thought it was nonsense to make this more difficult then it needs to be. In this layout I don't use any transistors either. In the schematic I drew in switches that you can add to turn individual channels on or off but I didn't include them in my build because I didn't have the space for them on the panel.
Here's the stripboard layout I made for the sequencer.
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