Wiki / Emitters
LEGO 9V Light brick (via RCX)
Status: ✅ works (rcxvll.nqh)
The LEGO 9V Light brick (2×1) is the most LEGO-native VLL emitter: hooked to an RCX output port and flashed in the VLL timing, it commands a Micro Scout.
How it works
- This is the approach in rcxvll.nqh (pbrick): NQC macros (
vll_init/start/0/1/stop) toggle the output,preamble = 400 ms,unit = 20 ms, full VLL opcode table. - Pure LEGO hardware, no electronics — but needs an RCX + tower to drive it.
Best for
Doing it the period-correct, all-LEGO way if you already own an RCX.