To get the specified clock tolerance you have to use the default internal oscillator (9.6 MHz for the tiny13). The calibration factor for the other oscillator is there, but you have to apply it manually in firmware. Look for the OSCCAL register.
edit: just wondering, did you see readings from initial flash lumens when power ON?
Over 1K lumens @30sec aint bad for this size of light anyway :sunglasses:
Ah, that’s interesting. I just fused the ATtiny mentioned above to 9.6 Mhz and the pwm frequency reading is now very accurate. I guess I can’t read the calibration value from Attiny program code?
Awesome review! I was searching for over discharge protection and your review answered my question!
Just purchased a pair of Samsung 30Q cells for this light i received yesterday, was wondering if anybody is using this battery along S41? Read on some post that 30Q provides too much Amp for this light and it will over heat very quickly. Any chance of the 30Q damaging it?
I am new here. Great review above, I ordered one based off the recommendations. I have one issue with mine, my 18650’s were dead and all I had was the extender tube and two 18350’s so i inserted them and I am afraid I murdered my light… Is there any way of repairing the over voltage the light had from my neglect and lack of knowledge? Or should I cut my losses and just order a new one. It was the nichia version. Thanks in advance!!!