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Desval27
Knock-off of the Elektor Formant Synthesizer project with the initial goal of being quasi-authentic and secondary goal undecided. Probably tweaks of some kind.
| Reference | Value | Description |
|---|---|---|
| IC1-IC5 | µA741C | Single Operational Amplifier |
| C1 | 10n | Unpolarized capacitor |
| C2 | 10µ | Polarized capacitor |
| D1-D5,D7 | 1N4148 | Fast Switching Diode |
| D6 | ENV IND | Light emitting diode |
| J8 | P1.1 | terminal |
| J9 | P1.3 | terminal |
| J10 | P1.2 | terminal |
| J11 | P2.3 | terminal |
| J12 | P2.2 | terminal |
| J13 | P2.1 | terminal |
| J14 | P3.1 | terminal |
| J15 | P3.3 | terminal |
| J16 | P3.2 | terminal |
| J17 | P4.1 | terminal |
| J18 | P4.2 | terminal |
| J19 | P4.3 | terminal |
| J20 | S1a | terminal |
| J21 | S1b | terminal |
| J22 | S1m | terminal |
| J23 | D6a | terminal |
| J24 | D6k | terminal |
| J25 | EOS | terminal |
| J26 | GND | terminal |
| P1-P3 | 1M | Variable Resistor |
| P4,R1,R9,R23,R24 | 10k | Resistor,Variable Resistor |
| P5 | 25k | Trimmable resistor (preset resistor) |
| R2,R25 | 4k7 | Resistor |
| R3,R7 | 5k6 | Resistor |
| R4,R6,R8,R16,R18 | 100k | Resistor |
| R5,R10,R11,R22 | 33k | Resistor |
| R12,R26,R27 | 470R | Resistor |
| R13,R21 | 1k | Resistor |
| R14,R20 | 27k | Resistor |
| R15,R19 |
|---|
| 6k8 |
| Resistor |
| R17 | 220R | Resistor |
|---|
| S1 | MODE | Single Pole Double Throw Switch |
|---|
| T1-T6 | BC108C | NPN transistor, emitter/base/collector |
|---|