Uploaded August 2025 | Updated September 2026, 2 weeks ago

---

Going to therapy is a sign of strength, not weakness. My paid partner
BetterHelp makes therapy simple, with 10% off your first month to help you
get started: betterhelp.com/bitluni (ad)

This project shows step by step how I tested different methods to modulate data onto analog tape. Using Microcesettes the analog audio quality was quite limited. A method used by Commodore in the 80ies worked well enough to store C64 games. The ch32v208 RISC-V handled the encoding and decoding of the analog data. A DIY PCB controlled the device and processed the analog streams. Open source code for this project can be found here:

Project code: github.com/bitluni/CDCTape

Tools and parts (affiliate links):
RISC-V CH32V208: aliexpress.bitluni.net/ch32v208
LinkE RISC-V Programmer: aliexpress.bitluni.net/LinkE
Low Temp Solder Paste: aliexpress.bitluni.net/lowTempPaste
Flux: aliexpress.bitluni.net/flux
Tweezer set: aliexpress.bitluni.net/tweezers
Soldering iron TS80P: aliexpress.bitluni.net/TS80P
Preheating Station: aliexpress.bitluni.net/heatingStation
Ultrasonic Cleaner: aliexpress.bitluni.net/cleaner

Github Sponsors: github.com/sponsors/bitluni
Patreon: patreon.com/bitluni
Channel membership: youtube.com/channel/UCp_5PO66faM4dBFbFFBdPSQ/join
Paypal: paypal.me/bitluni

bitluni live: youtube.com/@bitluniLive
Twitch: twitch.tv/bitluni
Mastodon: https://chaos.social/@bitluni
Discord: link.bitluni.net/discord

#Commodore64 #RetroTech #Electronics #DIY #C64