I made a few FW versions for different applications:
1A driver for bike light
6 modes + hidden strobe: 2Hz-flasher, moon, low, med, max, batt
moon 7mA
low 50mA
med 240mA
max 1A
1A driver for EDC light
7 modes + 3 hidden strobes: moon, low, med, max, batt, 1s-beacon, ramp
moon 7mA
low 50mA
med 240mA
max 1A
3A driver for EDC light
8 modes + 3 hidden strobes: moon, low, med, high, max, batt, 1s-beacon, ramp
moon 5mA
low 40mA
med 200mA
high 600mA
max 3A
All FW versions feature:
- off-time functions without hardware modification
- low-voltage monitor; 4 sec low light warning and shutdown at 2.9V
- battery check mode
- memory is disabled because it is less relevant in off-time operation
Available here mk2_FW_mod-20150610
Thanks again to Alex and others for their source code.
ps
If you can’t flash high-amp drivers check howto: flash ATtiny with AVRDude and command prompt