CM4 to Pi 3B Adapter (B) for Raspberry Pi CM4
Adapter board that allows a Raspberry Pi Compute Module 4 to plug into hardware designed for the Raspberry Pi 3 Model B/B+. Variant B; requires CM4 module (not included).
Pinout
- 3.3VHeadersType · Power
- 5VHeadersType · Power
- GNDGNDType · Ground
- GPIO (Pi 3B+ compatible)40-pin headerType · Signal
| Pin | Position | Type |
|---|---|---|
| 3.3V | Headers | Power |
| 5V | Headers | Power |
| GND | GND | Ground |
| GPIO (Pi 3B+ compatible) | 40-pin header | Signal |
Pin details
4 connections- 3.3VHeadersPower
- 5VHeadersPower
- GNDGNDGround
- GPIO (Pi 3B+ compatible)40-pin headerSignal
Start wiring
USB · Ethernet
Verify supply voltage and logic levels before powering up.
Module pins: 3.3V, 5V, GND, GPIO (Pi 3B+ compatible). Schematik maps them to your board in the app.
SBCs
155 other optionsFull Linux or Windows on a board: Raspberry Pi 5 (8GB) to Zero 2 W, a wide range of Jetson Nano and Orin kits for CUDA vision work, x86 LattePandas — plus the coolers, antennas, and NVMe adapters keyed to each board generation.
4-Way Fast Charge Buck Module (Compatible with Raspberry Pi 4B & Jetson Nano) visual preview4-Way Fast Charge Buck Module (Compatible with Raspberry Pi 4B & Jetson Nano)
51W PoE Expansion Board for LattePanda IOTA (IEEE 802.3bt) visual preview51W PoE Expansion Board for LattePanda IOTA (IEEE 802.3bt)
7-inch Touch Display Kit for Raspberry Pi Zero visual preview7-inch Touch Display Kit for Raspberry Pi Zero
70-pin Hirose Receptacle Header for Intel Edison - 3mm Height visual preview70-pin Hirose Receptacle Header for Intel Edison - 3mm Height
Aluminum M.2 2280 SSD Heat Sink (Compatible with LattePanda Sigma) visual previewAluminum M.2 2280 SSD Heat Sink (Compatible with LattePanda Sigma)
Banana Pi DFR0326 Single-Board Computer visual previewBanana Pi DFR0326 Single-Board Computer
BeagleBone Black (BB Black) visual previewBeagleBone Black (BB Black)
CM4 Dual Gigabit Ethernet 5G/4G Base Board for Raspberry Pi CM4 visual previewCM4 Dual Gigabit Ethernet 5G/4G Base Board for Raspberry Pi CM4
CM4-DISP-BASE-5A: 5" Touch Screen Base for Raspberry Pi CM4 visual previewCM4-DISP-BASE-5A: 5" Touch Screen Base for Raspberry Pi CM4
CM4-ETH-RS485-BASE-B: Dual ETH + Quad Isolated RS485 for CM4 visual previewCM4-ETH-RS485-BASE-B: Dual ETH + Quad Isolated RS485 for CM4
CM4-IO-BASE-A + USB HDMI Adapter for Raspberry Pi CM4 visual previewCM4-IO-BASE-A + USB HDMI Adapter for Raspberry Pi CM4
CM4-IO-BASE-A: Mini Base Board (A) for Raspberry Pi CM4 visual previewCM4-IO-BASE-A: Mini Base Board (A) for Raspberry Pi CM4
Related groups
4 groups
UNIHIKER M10 - IoT Python SBC with Touchscreen visual previewUNIHIKER M10
Python-first Linux single-board computer with an integrated 2.8-inch touchscreen and exposed micro:bit-compatible, Gravity I2C/I/O, USB host and microSD interfaces.
Boards · Single-board computers · 1 parts
10 I/Os PLC Module - CPU Arduino Nano (Optoisolated Output) visual previewArduino
About 75 boards across every Arduino generation: 5V Uno/Mega/GIGA, 3.3V MKR and Portenta, plus DFRduino and Bluno compatibles. Confirm the voltage rail before stacking any shield.
Boards · Arduino boards · 77 parts
10 I/Os Relay Module - CPU ESP32 (Relay Output) visual previewESP32
Wi-Fi and Bluetooth on a single chip, in every shape from Espressif DevKitC to Adafruit Feathers with STEMMA QT, DFRobot FireBeetles tuned for battery life, and Seeed XIAOs under a thumbnail.
Boards · ESP32 boards · 159 parts
15x7 CharliePlex LED Matrix FeatherWing - Cool White visual previewAdd-ons
About 270 add-ons across Pi HATs, Arduino shields, and FeatherWings. The same function — motor control, PoE, display — usually ships once per host connector family. Get the host board right first.
Boards · HATs, Shields & add-ons · 270 parts