Although it was already a great help when Fizik_S explained how this partially can be replaced with two batteries and the Gnd in the middle I tried it again with a sinus wave generator and some diodes to rectify it. It is a regulated power supply and it has a transformer. Hi, I am trying to make no.36 from the same pdf on page 35/42 I gave it a right click and 'open image in new tab' at Github. Ps, this picture has a little bit higher resolution. The simu-file is this one if somebody wants to try it. These new resistive sensors in SimulIDE are a very nice addition to the growing number of available components. That one and the Touch Controller are very pleasant circuits to experiment with and also number 30 which has a LDR in it. You know already about the generator.ΔΆ9 Timer and the rest start at pdf page 30/42 with short explanations of the working. 33 is the only one that doesn't work as expected. I don't know what the input signal in real life should be but it seemed to me when it is only positive or only negative than only one leds turns on. Speed is a full 100% until the generator in circuit 33 is switched on. I have seven more, number '35-Negative reference voltage' is not in the picture and is basically the same as no.34. You are welcome, thank you for supporting me
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