The Codec Zero is a Raspberry Pi Zero-sized audio HAT that delivers bi-directional digital audio signals (I2S) between a Raspberry Pi and the Codec Zero’s on-board Dialog Semiconductor DA7212 codec, and allows you to use a variety of input and output devices.
With features such as programmable green and red LEDs, plus a tactile button for user input, Codec Zero makes a great starting point for audio projects such as a walkie-talkie, intelligent doorbell, smart speaker, or vintage radio hack.
The Codec Zero is compatible with any Raspberry Pi computer that has a 40-pin GPIO header.
Features
Power LED
Additional green (GPIO23) and red (GPIO24) LEDs for status
Tactile button (GPIO27) for user input
Built-in mono electret microphone (MEMS)
HAT EEPROM write-enabled
Supports
Additional external mono electret microphone via 3.5mm panel-mounted barrel socket
1.2W 8Ω mono speaker via screw terminals
Stereo input and output channels, including external phono (RCA) sockets, via AUX IN and AUX OUT pins
Specifications
Form factor: 65 mm × 31 mm
Performance: High definition 24-bit 96kHz Dialog Semiconductor DA7212 digital audio codec (DAC)
Input power: Supplied by Raspberry Pi through the 40-pin GPIO header. No external power source required
As of 16/09/2025 - we are now stocking the rebranded 'green' Codec Zero from Raspberry Pi (previously IQAudio Codec Zero on a black PCB). The updated model uses a terminal block instead of pluggable connectors.
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