

IR Digipot
Digipot volume control using IR controller
- Size
- 54.9 × 58.4 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 134
- Nets
- 121
- Pads
- 423
- Tracks, vias
- 808, 107
- Pours
- 32
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 25 Dec 2020
- Updated
- 24 Jul 2021
Overview
IR Digipot is an open-source printed circuit board by sergeyvfx, from the sergeyvfx/IR-Volume-Control repository on GitHub, published under the MIT licence. It is a 2-layer board of 54.9 × 58.4 mm with 134 parts on 121 nets, routed with 808 tracks and 107 vias.
It is built around the OPA2134UA/2K5G4, AD5262BRUZ50-RL7 and TCM809LVNB713, with the TSOP75438TR, BLM15PG100SN1D11 and STL6P3LLH6 among its other parts. Its parts include 49 capacitors, 45 resistors, 11 diodes, 9 ICs and 7 transistors. It belongs with the PIC boards of this library.
Main components
12OPA2134UA/2K5G4
SOIC-8SOIC-8 Operational Amplifier ROHSTexas InstrumentsOperational AmplifierAD5262BRUZ50-RL7
TSSOP-16-40℃~+85℃ 130kHz 2 256 35ppm/℃ 50kΩ 5V~15V 60Ω、150Ω Linear Power-on reset SPI ±30% TSSOP-16 Digital Potentiometers ROHSAnalog DevicesDigital PotentiometersTCM809LVNB713
SOT-23-3-40℃~+125℃@(Tj) 1 140ms 1V~5.5V 4.63V 9uA Active Low No No Push-pull Voltage Monitor SOT-23-3 Supervisor and Reset ICs ROHSMicrochip TechnologySupervisor And Reset ICsTSOP75438TR
SMD-25℃~+85℃ 10mW 2.5V~5.5V 24m 350uA 38kHz ±50° SMD Infrared Remote Receiver (IRM) ROHSVishay IntertechnologyInfrared Remote Receiver (IRM)BLM15PG100SN1D11
04020402 Ferrite Beads ROHSMurataFerrite BeadsSTL6P3LLH6
PowerFLAT-8(3.3x3.3)1 P-Channel 1.45nF 120pF 12nC@24V 1V 2.9W 30V 30mΩ@10V 6A PowerFLAT-8(3.3x3.3) MOSFETs ROHSSTMicroelectronicsMOSFETsACP3225-102-2P-T000
SMD-4P,3.2x2.5mm-40℃~+85℃ 1.5A 10MΩ 1kΩ@100MHz 2 50mΩ 60V SMD-4P,3.2x2.5mm Common Mode Filters ROHSTDKCommon Mode FiltersHSMG-C170
0805-40℃~+85℃ 15mcd 170° 2.2V 20mA 52mW 570nm 572nm Discrete Diode Green Diffused Lens Yellow Green 0805 LED Indication - Discrete ROHSBroadcom LimitedLED Indication - DiscreteMMBT3904LT1G
SOT-23-55℃~+150℃ 1 NPN 100nA 200mA 200mW 300 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSFUXINSEMIBipolar (BJT)MMBT3906LT1G
SOT-23-55℃~+150℃ 1 PNP 200mA 225mW 250MHz 250mV 40V 50nA 5V 60 PNP SOT-23 Bipolar (BJT) ROHSonsemiBipolar (BJT)SS14HE
SOD-323HE-55℃~+125℃ 1 Independent 1A 30A 40V 500uA@40V 550mV@1A SOD-323HE Schottky Diodes ROHSTECH PUBLICSchottky DiodesSTX-3500-5NTR
-Audio Connectors (Headphones)Kycon
README
README.mdIR Volume Control
Volume control using DigiPot controlled by infrared remote control.
IR Controllable Digipot
This part of the project is a what is actually controlling sound volume. It is a digipot which is controlled by an infrared remote controller (similar to the ones used by TVs).
The design and firmware files are in the IR-Digipot folder.
IR Controller
This is a minimalistic implementation of infrared remote controller. It talks
to the IR-Digipot. Can be easily extended with more buttons to consolidate
all the remote controllers in the house!

Licensing
All the work done and implemented for this project is licensed under the terms of MIT license.
Parts
134| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | 0.1uF | Capacitor_Ceramic:C_0402_1005Metric | C3, C4, C5, C6, C19, C20, C23, C24, C25, C31, C34, C38, C47, C49 |
| 6 | 100K | Resistor:R_0402_1005Metric | R1, R25, R28, R31, R32, R35 |
| 6 | 22K | Resistor:R_0402_1005Metric | R9, R10, R19, R20, R29, R36 |
| 6 | NC | Resistor:R_0402_1005Metric | R22, R23, R24, R30, R37, R45 |
| 4 | 10uF | Capacitor_Ceramic:C_0805_2012Metric | C21, C22, C40, C41 |
| 4 | 12K | Resistor:R_0402_1005Metric | R11, R12, R15, R16 |
| 4 | 1uF | Capacitor_Ceramic:C_0603_1608Metric | C27, C28, C29, C30 |
| 4 | 47 | Capacitor_Ceramic:C_0402_1005Metric | C11, C12, C13, C14 |
| 4 | BLM15PG100SN1D | Inductor:L_0402_1005Metric | FB1, FB2, FB3, FB4 |
| 3 | 0 | Resistor:R_0402_1005Metric | R2, R3, R4 |
| 3 | 100 | Resistor:R_0402_1005Metric | R33, R38, R40 |
| 3 | 1K | Resistor:R_0402_1005Metric | R27, R34, R39 |
| 3 | 4.7uF | Capacitor_Ceramic:C_0805_2012Metric | C42, C44, C48 |
| 3 | STL6P3LLH6 | Package_DFN_QFN:8-PowerVDFN | Q5, Q6, Q7 |
| 2 | 0.22 uF | Capacitor_Ceramic:C_0402_1005Metric | C15, C16 |
| 2 | 10K | Resistor:R_0402_1005Metric | R17, R18 |
| 2 | 10nF | Capacitor_Ceramic:C_0402_1005Metric | C37, C45 |
| 2 | 10uF | Capacitor_Electrolytic:CP_Elec_5x5.4 | C7, C8 |
| 2 | 150 | Capacitor_Ceramic:C_0402_1005Metric | C9, C10 |
| 2 | 150 | Resistor:R_0402_1005Metric | R5, R6 |
| 2 | 1N914 | Diode:SOD-523 | D4, D5 |
| 2 | 4 pF | Capacitor_Ceramic:C_0402_1005Metric | C1, C2 |
| 2 | 470uF | Capacitor_Electrolytic:CP_Elec_8x10 | C17, C18 |
| 2 | 47K | Resistor:R_0402_1005Metric | R13, R14 |
| 2 | 680 | Resistor:R_0402_1005Metric | R7, R8 |
| 2 | ACP3225-102-2P-T000 | Inductor:ACP3225 | L1, L3 |
| 2 | ESDA25P35 | Package_DFN_QFN:UDFN-2 | D6, D9 |
| 2 | HSMG-C170 | LED:HSMx-C170 | D2, D3 |
| 2 | MMBT3904LT1G | Package_TO_SOT:SOT-23 | Q1, Q3 |
| 2 | MMBT3906LT1G | Package_TO_SOT:SOT-23 | Q2, Q4 |
| 2 | OPA2134UA_2K5 | Package_SO:SOIC-8_Width3.9mm_Pitch1.27mm | U4, U5 |
| 2 | SS14HE | Diode:SOD-323HE | D1, D10 |
| 2 | STX-3500-5NTR | Connector_Audio:STX-3500-5NTR | J3, J4 |
| 1 | 0.47uF | Capacitor_Ceramic:C_0402_1005Metric | C43 |
| 1 | 1054500101 | Connector_Data:1054500101 | J5 |
| 1 | 10uF | Capacitor_Ceramic:C_1210_3225Metric | C32 |
| 1 | 187K | Resistor:R_0402_1005Metric | R43 |
| 1 | 1nF | Capacitor_Ceramic:C_0402_1005Metric | C35 |
| 1 | 2.2nF | Capacitor_Ceramic:C_0402_1005Metric | C39 |
| 1 | 2.2uF | Capacitor_Ceramic:C_0603_1608Metric | C46 |
| 1 | 220nF | Capacitor_Ceramic:C_0603_1608Metric | C33 |
| 1 | 22nF | Capacitor_Ceramic:C_0402_1005Metric | C36 |
| 1 | 3.3K | Resistor:R_0402_1005Metric | R21 |
| 1 | 4.7uF | Capacitor_Ceramic:C_1206_3216Metric | C26 |
| 1 | 470 | Resistor:R_0402_1005Metric | R26 |
| 1 | 5.1K | Resistor:R_0402_1005Metric | R41 |
| 1 | 698 | Resistor:R_0402_1005Metric | R42 |
| 1 | 82K | Resistor:R_0402_1005Metric | R44 |
| 1 | ABM8W-20.0000MHZ-4-K1Z-T3 | Crystal:Crystal_SMD_4Pin_3.2x2.5mm | X1 |
| 1 | AD5262BRUZ50-RL7 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U6 |
| 1 | BAT54 | Diode:SOD-523 | D8 |
| 1 | Conn_1x03_Generic | Connector_Generic:Conn_1x03_D0.65mm_Pitch2.54mm_staggered | J2 |
| 1 | Conn_1x06_Generic | Connector_Generic:Conn_1x06_D0.65mm_Pitch2.54mm_staggered | J1 |
| 1 | ESDA25W | Package_TO_SOT:SOT-323 | D7 |
| 1 | ESDA7P120 | Diode:D_0603_1610Metric | D11 |
| 1 | L7985TR | Package_DFN_QFN:VFDFPN-10_EP_3x3mm_P0.5mm | U8 |
| 1 | LM27761DSGR | Package_SON:WSON-8-EP_P0.5mm | U9 |
| 1 | LQH44PN220MP0L | Inductor:L_1515_4040Metric | L2 |
| 1 | PIC18F2550T-ISO | Package_SO:SOIC-28_Width7.50mm_Pitch1.27mm | U2 |
| 1 | STUSB4500QTR | Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U7 |
| 1 | TCM809LVNB713 | Package_TO_SOT:SOT-23 | U1 |
| 1 | TSOP75438TR | Interface_Optical:TSOP754 | U3 |
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Questions
How big is the IR Digipot PCB?
It measures 54.9 × 58.4 mm and has 2 copper layers, 1.6 mm thick.
What parts does the IR Digipot use?
134 parts, built around the OPA2134UA/2K5G4, AD5262BRUZ50-RL7, TCM809LVNB713 and TSOP75438TR. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the IR Digipot KiCad files?
From the sergeyvfx/IR-Volume-Control repository on GitHub, at the commit this page was made from: the board is IR-Digipot/hardware/IR Digipot.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the IR Digipot design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).