No, the heatsink hole (or in general the metal part) of the 7805 should be ok at this moment. You can always check if this is a "good" ground by measuring the voltages on J4.maclean wrote: Do you think I should be putting the black probe somewhere else? I must admit I'm not really sure but if you have advice on the best place to use I will certainly follow. I have not even put J3 together yet and have so far only got J4.
Definitely. However "a step forward" sounds to me as if something else is still not working? You're not getting any sound yet when applying the appr. 5.3v to the correct side of R146?maclean wrote: I checked how many SC536s I have left compared to how many I need to finish the kit and I have been sent one extra in my kit!! So I soldered the extra one in and measured the middle pin and am now getting 11.7v... That's gota be a step forward eh?!