doepfer diy analog synthesizer kit (without controls, sockets, switches, cables, power supply and case, with temperature control of the vco) price : $180.00
cable set (two ribbon cables with 16 pins and five with 10 pins, each ~ 50 cm long, with assembled dual row female connectors on one side, the other side of each cable is open, enables to connect/disconnect the diy board without any soldering from the customers assembly) price : $30.00

important note: the diy synth kit is planned for experienced users only who are familiar with both electronics and analog synthesizers. it is definitely unsuitable for beginners! for example we will not be able to offer the service to repair a customers assembly if it does not work as it should, or to make individual suggestions how to wire the board for special applications. we have to emphasize this fact very clearly in advance to avoid unsatisfied customers who will have problems getting their synth to run. of course we will publish a detailed list that explains the function of each pin and a suggestion how to use this pin.

the diy synth is the beginning of a a new product line: a low cost diy kit to build a full-fledged analog synthesizer. the kit is made of an assembled and tested pc board that includes all that is necessary to build a standard analog synthesizer:

vco:
sawtooth output
rectangle output (with variable pulse width)
four frequency cv inputs (1v/octave with tempo option)
frequency cv summing input (can be used to increase the number of cv inputs if more than four frequency cv inputs are required)
two pw/pwm cv inputs
pw cv summing input (can be used to increase the number of cv inputs if more than two pw cv inputs are required)
linear fm input
hard sync input

vcf:
multimode filter
lowpass, highpass and bandpass output (optional low-notch-highpass with external potentiometer)
12db/oct
two frequency cv inputs (one roughly 1v/octave, one roughly 0.5v/octave)
frequency cv summing input (can be used to increase the number of cv inputs if more than two frequency cv inputs are required)
audio input
audio summing input (can be used if more than one audio input is required)
overdrive/distortion possible
manual resonance control
resonance up to self oscillation

vca:
exponential control scale
one cv input
cv summing input (can be used if more than one cv input is required)
two audio inputs
audio summing input (can be used if more than two audio inputs are required)
overdrive/distortion possible
audio output

adsr:
connection for attack, decay, sustain and release controls
connection for range switch (3 ranges)
connection for led display
gate input
adsr output

lfo:
connection for frequency control
connection for range switch (3 ranges)
connection for led display
triangle and rectangle outputs

slew limiter:
connection for slew control
input
output

inverter:
input
summing input (can be used to increase the number of inputs, e.g. to built an inverting mixer)
output

the kit is planned for customers who are familiar with electronic basics as the kit does not include the controls, switches, sockets, power supply and the case. these elements have to be added and wired by the customer. the board is equipped with dual row pin headers. this enables the usage of dual row female connectors instead of soldering the controls directly to the pins. the customer can choose the desired size, shape, type and color of these elements (e.g. rotary potentiometers or faders, small 3.5 mm jack sockets or ¼" sockets or banana type, small or large knobs and switches and so on). even the type of wiring is free: the range goes from a pre-wired standard synth (vco-vcf-vca type) up to a fully patchable modular system. two or more of the kits can be combined to obtain more vcos, adsrs, lfos, vcas or vcfs, e.g. to built a more complex pre-wired or modular synth. we also think about a diy expansion board that may contain a noise generator, s&h, ring modulator, mixer, maybe midi/usb interface and multi-effect unit, and other often used synthesizer units. a stabilized symmetrical 12v power supply (i.e. -12v, gnd, +12v) with at least 150 ma current is required.

the additional working time and required skills to build a working unit from the kit should not be underrated! one should count at least on one weekend, even if you are an experienced hobbyist. to obtain all features about 25 potentiometers, 20 sockets and several switches have to be mounted into a suitable housing and wired faultless. we ask for your understanding that we cannot offer the service to troubleshoot a customer's assembly. the pc boards comes assembled and tested. only the adjustment of the 1v/octave scale and the frequency offset of the vco have to be carried out by the customer.

click here for the manual.