carlos206

Hi can I use the op amp LF355 instead MC34071 or TLE2141? i saw that Vcc max is 44. thx

The answer is Supply1_ _Supply2_ | | | | | | | | | | | | |_+____- __| | __+__-__ | | |__________ | | | | | | | | |_Voltage?___|_Voltage?_| Good luck!

:) Hi I have a question for you Audioguru, Why did you eliminate the transistor Q1? I saw this function was protect the output circuit we are testing when the power input is disconected ( I mean the discharge from capacitors). Another question I built two upgraded circuits and works pretty well (whit LCD