Pico pwm dac board
About the Pico pwm dac board
Pico pwm dac board is an open source PCB design by wrochira, published on GitHub under the CC-BY-NC-4.0 license. It is a 4-layer board measuring 78.7 × 61 mm, with 69 components from 11 distinct parts.
Other key parts include the LM7805_TO220 and TL072. By type, the board carries 42 resistors, 13 capacitors, 10 ICs and 4 connectors.
From the project
An 8‑channel precision voltage generator using PWM-to-analog conversion with op-amp scaling.
This board docks a Raspberry Pi Pico and converts eight 0–3.3V PWM outputs into eight independent, precision analog voltages spanning approximately ±18.15V. It was designed as a practical, low-cost way to generate multiple coefficient or control voltages for analog computing and general mixed‑signal experiments, without the complexity or price of multi‑channel DACs and function generators.
Main components on the Pico pwm dac board
Pico pwm dac board bill of materials (BOM)
69 components, 11 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM7805_TO220 | TO-220-3_Vertical | U2 |
| 9 | TL072 | SOIC-8_3.9x4.9mm_P1.27mm | U3, U4, U5, U6, U7, U8, U9, U10 +1 |
| 1 | CONN_01X03_PIN Conn_01x03_Pin | PinHeader_1x03_P2.54mm_Horizontal | J1 |
| 2 | CONN_01X20_SOCKET Conn_01x20_Socket | PinSocket_1x20_P2.54mm_Vertical | J2, J3 |
| 1 | CONN_02X08_ODD_EVEN Conn_02x08_Odd_Even | PinHeader_2x08_P2.54mm_Vertical | J4 |
| 11 | 10U 10u | CP_Radial_D5.0mm_P2.00mm | C1, C2, C5, C6, C7, C8, C9, C10 +3 |
| 1 | 330N 330n | C_0603_1608Metric | C3 |
| 1 | 100N 100n | C_0603_1608Metric | C4 |
| 26 | 10K 10k | R_0805_2012Metric | R1, R2, R3, R5, R7, R8, R10, R12 +18 |
| 8 | 20K 20k | R_0805_2012Metric | R4, R9, R14, R19, R24, R29, R34, R39 |
| 8 | 100K 100k | R_0805_2012Metric | R6, R11, R16, R21, R26, R31, R36, R41 |
Pico pwm dac board design files
The KiCad project lives in the wrochira/pico-pwm-dac-board repository on GitHub; these links point at the commit this page was built from.
- LayoutCoefficients.kicad_pcb
- SchematicCoefficients.kicad_sch
- BOMproduction/bom.csv
Pico pwm dac board: common questions
How big is the Pico pwm dac board?
The Pico pwm dac board measures 78.7 × 61 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Pico pwm dac board?
69 components, from 11 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 Pico pwm dac board design files?
From the wrochira/pico-pwm-dac-board 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 Pico pwm dac board design in my own project?
It is published under CC-BY-NC-4.0, which limits how it may be reused; read the license before building on it.