I can barely believe this is really happening. I am going to build my very own TTSH or "mini meany", how The Human Comparator's DIY clone of the legendary 70s Synth Arp2600 is also known.
Sound designer Ben Burtt used an ARP 2600, combined with his own voice, to create the voice of R2-D2 in the Star Wars films.
The PCB/Panel set and a great deal of the bits and pieces necessary for completing the unit came trickleing in over the last five weeks. Yesterday I started soldering. First, the PSU:
The PSU takes 12-24V from a DC-wallwart and delivers +15V and -15V, each of which come in two channels: One is precisely trimmed to 15.00V for all synth related functions of the TTSH while the other channel is used mainly for powering the LEDs, where small differences in Voltage don't matter much anyways.
Next up, the three 4027-1 oscillator sub-boards. I'm currently missing the 1.86k positive Tempco-Resistor that is used for temperature stabilization in this circuit.
Notice that I use an old toothbrush and isopropyl alcohol to clean up solder-flux residue.