HardLabs

Volume control board

jjculber·volume-control-board·hardware/volume_control_board.kicad_pcb

Volume control board layout, top view — open source NXP board by jjculber

About the Volume control board

Volume control board is an open source NXP PCB design by jjculber, published on GitHub. It is a 2-layer board measuring 82.8 × 55.3 mm, with 31 components from 14 distinct parts.

Its main chip is the TEENSY3.2, from the NXP family. Other key parts include the AD5254. By type, the board carries 13 resistors, 10 connectors, 5 capacitors, 2 ICs and 1 switch.

From the project

The goal of this project is to make a small PCB for controlling volume with a rotary encoder and digital potentiometer.

The goal of this project is to make a small PCB for controlling volume with a rotary encoder and digital potentiometer.

- Audio Input: 3.5mm TRS jack - Digital Potentiometer: AD5254 (4 circuits, 256 taps, 10k or 50k ohms) - Audio Output: Shielded RJ45 for sending 4 channels to amplifier with cat6

Main components on the Volume control board

TEENSY3.2AD5254

Volume control board bill of materials (BOM)

31 components, 14 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TEENSY3.2
Teensy3.2
U1
1
AD5254
U2
1
SCREW_TERMINAL_01X08
Screw_Terminal_01x08
J1
1
AUDIOJACK3
AudioJack3
J2
2
CONN_01X04
Conn_01x04
J3, J7
1
CONN_01X04
5V in
J4
1
CONN_01X04
Conn_01x03
J5
1
RXTX/CAN
J6
3
Conn_01x03
J8, J9, J10
1
Rotary_Encoder_Switch
SW1
5
0.1UF
0.1uF
C1, C2, C3, C4, C5
2
2.2K
2.2k
R1, R2
7
10K
10k
R3, R4, R5, R6, R7, R8, R9
4
R
R10, R11, R12, R13

Volume control board design files

The KiCad project lives in the jjculber/volume-control-board repository on GitHub; these links point at the commit this page was built from.

Volume control board: common questions

What microcontroller does the Volume control board use?

The Volume control board is built around the TEENSY3.2, from the NXP family.

How big is the Volume control board?

The Volume control board measures 82.8 × 55.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Volume control board?

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 Volume control board design files?

From the jjculber/volume-control-board repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Volume control board design in my own project?

The repository has no license, so all rights stay with jjculber. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Volume control board without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug NXP firmware against it before you order a PCB.

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