Preamp power
About the Preamp power PCB
Preamp power is an open source PCB design by vlad-ivanov-name, published on GitHub. It is a 2-layer board measuring 61.4 × 17.2 mm, with 11 components from 8 distinct parts.
Other key parts include the CMIC and 78L09. By type, the board carries 6 connectors, 2 ICs, 2 capacitors and 1 resistor.
From the project
Cheap PC microphone with a preamplifier
PC microphone with a preamplifier. Supposed to be cheap and provide good sensetivity.
Based on TI's OPA172 reference design. Power is supplied through USB (micro-USB connector), upped to about 11V with a DC-DC converter, then regulated to 9V and filtered.
Adjust DC-DC converter voltage to about 11V. I used 2.54mm pin headers as standoffs for the converter.
Main components on the Preamp power
Preamp power bill of materials (BOM)
11 components, 8 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CMIC | CMIC | U101 |
| 1 | 78L09 | SOT89-3_Housing | U102 |
| 3 | CONN_01X02 | BOARD-CONNECT | P101, P104, P106 |
| 1 | USB_OTG | USB-MICRO-B | P102 |
| 2 | CONN_01X02 | BOARD-CONNECT-DCDC | P103, P105 |
| 1 | 10u | TantalC_SizeA_EIA-3216_HandSoldering | C101 |
| 1 | 100n | C_1206 | C102 |
| 1 | 0 | R_0603 | R101 |
Preamp power design files
The KiCad project lives in the vlad-ivanov-name/microphone repository on GitHub; these links point at the commit this page was built from.
- Layoutpreamp-power.kicad_pcb
Preamp power: common questions
How big is the Preamp power PCB?
The Preamp power measures 61.4 × 17.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Preamp power?
11 components, from 8 distinct parts. The full bill of materials is listed on this page.
Where can I download the Preamp power design files?
From the vlad-ivanov-name/microphone repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Preamp power design in my own project?
The repository has no license, so all rights stay with vlad-ivanov-name. Use it as a reference, and ask the author before reusing the design.
