This adapter board converts a Raspberry Pi Compute Module 4 (CM4) to the Raspberry Pi Compute Module 3 SODIMM format, allowing you to maintain projects, designs and products that use the older CM3 format by utilising newer generation Compute Modules. The adapter board uses a standard CM4 connector and includes an onboard CM4 ACT status indicator, buck-boost chip to support 3.3V/V power input, power supply selection pads and IO level selection pads. Adapt them all! We have a few other options in the store if you're into this CM4 adapting life: * CM4 to 3B adapter * CM4 to 4B adapter Features * Onboard standard CM4 connector, support access to CM4 Lite / eMMc series boards * Onboard standard CM3 SODIMM, easily connected to the original CM3 ecosystem baseboard * Onboard buck-boost DC chip - supports 3.3V/5V power input * Onboard ACT LED, can monitor the working status of CM4 in real-time * Overall dimensions: 67.6mm x 46mm Package Contents * 1x CM4-to-CM3 Board Compute Module not included Resources * Product Documentation Onboard Resource Comparison CM4-to-CM3-Board CM4 HDMI HDMI0 GPIO0~27 GPIO0~27 GPIO28, GPIO29 GPIO44(SDA0), GPIO45 (SCL0) GPIO31, GPIO33 CAMGPIO GPIO30, GPIO32, GPIO33~45 NC CSI0 CSI1 CSI1 CSI0 DSI0 DSI1 DSI1 DSI0 USB2.0 USB2.0 SDIO SDIO https://elecena.pl/product/22727676/cm4-to-cm3-adapter 2023-03-07 https://elecena.pl/product/22727676/cm4-to-cm3-adapter 2023-12-27 https://elecena.pl/product/22727676/cm4-to-cm3-adapter 2024-09-18 https://elecena.pl/product/22727676/cm4-to-cm3-adapter 2024-11-29 https://elecena.pl/product/22727676/cm4-to-cm3-adapter 2024-11-30 https://elecena.pl/product/22727676/cm4-to-cm3-adapter 2025-08-06 https://elecena.pl/product/22727676/cm4-to-cm3-adapter 2025-11-28 https://elecena.pl/product/22727676/cm4-to-cm3-adapter 2025-11-29