# packet radio

Published articles for packet radio.

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## Pi Pico Recreates The Heathkit Pocket Packet

DevFeed: [Pi Pico Recreates The Heathkit Pocket Packet](<https://devfeed.tech/articles/pi-pico-recreates-the-heathkit-pocket-packet-60259.md>)

Original publisher: [Read original article](<https://hackaday.com/2026/09/25/pi-pico-recreates-the-heathkit-pocket-packet/>)

Author: Zoe Skyforest

Published: 2026-09-25T20:00:50Z

Content type: article

Language: en

Sources: [Hackaday](<https://devfeed.tech/sources/hackaday.md>)

Topics: [Raspberry Pi](<https://devfeed.tech/topics/raspberry-pi.md>), [Embedded Software Dev](<https://devfeed.tech/topics/embedded-software-dev.md>), [Emulator](<https://devfeed.tech/topics/emulator.md>), [Microcontroller](<https://devfeed.tech/topics/microcontroller.md>), [Hardware](<https://devfeed.tech/topics/hardware.md>)

Tags: [ax](<https://devfeed.tech/tags/ax.md>), [emulator](<https://devfeed.tech/tags/emulator.md>), [firmware](<https://devfeed.tech/tags/firmware.md>), [ham-radio](<https://devfeed.tech/tags/ham-radio.md>), [heathkit](<https://devfeed.tech/tags/heathkit.md>), [microcontroller](<https://devfeed.tech/tags/microcontroller.md>), [misc-hacks](<https://devfeed.tech/tags/misc-hacks.md>), [modem](<https://devfeed.tech/tags/modem.md>), [packet-radio](<https://devfeed.tech/tags/packet-radio.md>), [pi](<https://devfeed.tech/tags/pi.md>), [pi-pico](<https://devfeed.tech/tags/pi-pico.md>), [raspberry-pi-pico](<https://devfeed.tech/tags/raspberry-pi-pico.md>)

### AI overview

A Raspberry Pi Pico project recreates the Heathkit HK-21 Pocket Packet by running its firmware through a Z80 emulator and handling packet-radio tone modulation and demodulation. The device supports legacy packet-radio software, APRS, AX.25 Level 2, and a built-in bulletin board system.

### Source excerpt

Packet radio is a particularly fun part of the ham radio hobby. Once upon a time, you might have squirted data about the airwaves using something like the Heathkit HK-21 ...read more