Pc soundcard scope adapter - 2 channels
1V0 and 1V9/0V0 and 0V9 are 9 volt battery conections (2 of them) ic1, ic5 and ic6 are outputs (1 reference output aprox 280 hz) and two channels. You can use a stereo jack to connect it to a USB soundcard and Voila! Now you have a buck scope!
Also with VR1 and VR2 you cans adjust the output amplitude...
SW1 & SW2 are peak voltage selectors, from 1,4 volt max to 1400 volt max
Pc soundcard scope adapter - 2 channels
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