My friend ask me for creating of printed circuit board for guitar control. It is not my construction but circuit is from Red Free Circuits pages. Circuit has selective input sensitivity -10dB, 0dB and +10dB. It also includes tone control. It has very small consumption that it can run on one small 9V battery.
Circuit IC1A is inverting preamplifier with settable amplification changed by value of resistor R4 with paralelly connected resistors R2 or R3. Next section around IC1B is 3 band equaliser. More informations are on authors pages.
Printed circuit board is single-sided without any wire-wrap. It can be created in amateur condition, but if is not used solder-mask, that soldering of wires is a little complicated around ground planes.
All parts are easily available in a local component stores. On the board is space for faston connectors, that except parts in a table will be needed to buy right guitar jacks, switches and small case with space for battery.
| name | value and type | quantity |
|---|---|---|
| P1, P2 | 100k/N linear potentiometer | 2x |
| P3 | 470k/N linear potentiometer | 1x |
| P4 | 10k/G logarhytmic potentiometer | 1x |
| R1 | 150k | 1x |
| R2 | 220k | 1x |
| R3 | 56k | 1x |
| R4 | 470k | 1x |
| R5-R7 | 12k | 3x |
| R8, R9 | 3k9 | 2x |
| R10, R11 | 1k8 | 2x |
| R12, R13 | 22k | 2x |
| C1 | 220nF/63V foil RM5 | 1x |
| C2, C8 | 4u7/63V elektrolytic RM2 | 2x |
| C3 | 47nF/63V foil RM5 | 1x |
| C4, C6 | 4n7/63V foil RM5 | 2x |
| C7, C9 | 100uF/25V elektrolytic RM3.5 | 2x |
| IC1 | TL062 DIL | 1x |
| J1, J2 | Faston to the PCB | 2x |
| X1, X2 | AK300/2, or minifaston | 2x |
| X3 | AK300/3, or minifaston | 1x |
I have information from friend, that guitar control works in more exemplars.
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