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 * Operating temperature: 0°C–50°C Resources * Product Brief * Audio board documentation * Product number: SC2079/SC0366 * EAN: 0617588405556 Revision History * 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. https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2023-03-07 https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2023-12-27 https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2024-03-21 https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2024-04-16 https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2024-09-19 https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2024-11-29 https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2024-11-30 https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2025-11-28 https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2025-11-29 https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2026-02-03 https://elecena.pl/product/22720131/raspberry-pi-codec-zero 2026-03-03