Piezo pickup impedance converter, split pickup, bass boost
About the Piezo pickup impedance converter, split pickup, bass boost PCB
Piezo pickup impedance converter, split pickup, bass boost is an open source PCB design by compuphase, published on GitHub. It is a 2-layer board measuring 26 × 16.5 mm, with 31 components from 14 distinct parts.
Other key parts include the OPA323. By type, the board carries 14 resistors, 10 capacitors, 3 ICs and 3 connectors.
From the project
High impedance preamplifier for piezo pickups
The designs are in KiCad. PDFs with the schematics, and the Gerber files for the PCBs are also provided.
It is a pretty classic opamp circuit. Amplification is fixed at 1× —the circuit is only to adapt the impedance (piezo bridge pickups are pretty loud already). The main feature of the circuit is that it is compact, and especially narrow. The idea is to fit this preamplifier into a slot immediately below the pickup.
Main components on the Piezo pickup impedance converter, split pickup, bass boost
Piezo pickup impedance converter, split pickup, bass boost bill of materials (BOM)
31 components, 14 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | OPA323 | SOT353 | U1, U2, U3 |
| 2 | piezo | PinHeader_1x02_P2.00mm_Vertical | J3, J4 |
| 1 | output | PinHeader_1x03_P2.00mm_Vertical | J5 |
| 1 | 20K 20k | TC42 | RV2 |
| 3 | 220N 220n | 0603 | C1, C2, C5 |
| 2 | 68P 68p | 0603 | C3, C4 |
| 1 | 22N 22n | 0603 | C6 |
| 1 | 1u | 0603 | C7 |
| 1 | 4U7 4u7 | 0805 | C8 |
| 2 | 100k | 0603 | C9, C10 |
| 2 | 2M2 | 0603 | R1, R2 |
| 8 | 100K 100k | 0603 | R3, R4, R5, R6, R10, R11, R12, R15 |
| 2 | 470K 470k | 0603 | R7, R8 |
| 2 | 22K 22k | 0603 | R9, R13 |
Piezo pickup impedance converter, split pickup, bass boost design files
The KiCad project lives in the compuphase/piezo-preamplifier repository on GitHub; these links point at the commit this page was built from.
Piezo pickup impedance converter, split pickup, bass boost: common questions
How big is the Piezo pickup impedance converter, split pickup, bass boost PCB?
The Piezo pickup impedance converter, split pickup, bass boost measures 26 × 16.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Piezo pickup impedance converter, split pickup, bass boost?
31 components, from 14 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Piezo pickup impedance converter, split pickup, bass boost design files?
From the compuphase/piezo-preamplifier repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Piezo pickup impedance converter, split pickup, bass boost design in my own project?
The repository has no license, so all rights stay with compuphase. Use it as a reference, and ask the author before reusing the design.
