H1 led value

[ramagochi]

Yesterday I finished my SRR01 at 18V (328 +LT1028), but I measured it and I have 18'6V, will be a H1led problem?, my H1 is clear red and have 1,9V VF, is this correct?.

Best Regards

[peranders]

LM329 has some tolerance so 18.7 V seems to be OK. If you measure the voltage in a few spots I can check this for you. As long as the LED is on it doesn't matter which voltage you have across it.

Can you measure
N1, pin 2
N1, pin 3
N1, pin 6

Do you use my component values for 18V?

[ramagochi]

Yes, I'm using your values.

N1 pin2=6,78V
N1 pin3=6,78V
N1 pin6=11,74V

[peranders]

Looks, good. Pin 2 = pin 3 = perfect regulation

If you want exactly 18 volts you may have to decrease the gain.

18/6.78 = 2.655 in gain

R10 6k8 -> 5k6 might do the trick to achieve 18 volts.

[ramagochi]

Thank you!!