cnlohr/channel3
ESP8266 Analog Broadcast Television Interface observed · 2026-08-28
Health v2 · maintenance only
54/100
- Activity 49
- Release rhythm 35
- Longevity 100
Flags: no_releases no_license
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 3868
- days_rel: n/a
- days_push: 306
- n_releases_24m: 0
Adoption not part of the score
1573 stars · 167 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
Firmware for the ESP8266 that turns the chip into an analog broadcast television transmitter, outputting an NTSC/PAL-compatible signal on Channel 3 from GPIO3. It exploits the I2S bus at an 80 MHz bitclock with DMA buffers to modulate luma and chroma signals that a vintage analog TV can tune into with an antenna.
Use cases
- display video output from an esp8266 on an old analog tv
- generate ntsc or pal television signals from cheap hardware
- experiment with rf signal generation on the esp8266
- build a retro tv demo without extra video hardware
- learn how analog tv luma and chroma modulation works
- hook an antenna to gpio3 and broadcast on channel 3
When to choose
- you have an ESP8266 and an analog TV and want video output with no additional hardware
- you want a hands-on project for learning RF modulation, DMA, and the I2S peripheral
- you are building retro hardware demos that display on vintage CRT televisions
When to avoid
- you need a legal, compliant video transmitter - unlicensed RF broadcast may violate regulations in your jurisdiction
- you need modern digital TV output (HDMI, DVB, ATSC) rather than analog NTSC/PAL
- you need high image quality - the signal is intentionally hacky with artifacts like dot crawl
Facets
application · maturity active
embedded graphics embedded-systems hardware media embedded iot esp8266 analog-tv ntsc pal rf-signal-generation i2s dma firmware channel3 hack
1 source
- readme: https://github.com/cnlohr/channel3 · fetched 2026-08-28 · e3de6665339d
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| cnlohr/channel3 | main | 54 |
For agents
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem