UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Ridiculous thoughts and ideas from a young age

duncanlowe · 17th Nov 2020, 8:55 pm

This one isn't exactly my fault. But I was trying to build a circuit to slow down changes in voltage. In those days, I had absolutely no idea, but someone who was 'helping' me drew a circuit for me to build using 741s and caps in the feedback loops as I remember. I had never heard of or experienced opamps. When I connected the + and - terminals as shown in their diagram to the power supply + and - it didn't work. As I had never heard of inverting and non-inverting inputs at that point how would I have known otherwise. Incidentally their circuit diagram had ignored the actual power connections.

17th Nov 2020, 8:55 pm	#101
duncanlowe Nonode Join Date: Jan 2016 Location: Stafford, Staffs. UK. Posts: 2,532	Re: Ridiculous thoughts and ideas from a young age This one isn't exactly my fault. But I was trying to build a circuit to slow down changes in voltage. In those days, I had absolutely no idea, but someone who was 'helping' me drew a circuit for me to build using 741s and caps in the feedback loops as I remember. I had never heard of or experienced opamps. When I connected the + and - terminals as shown in their diagram to the power supply + and - it didn't work. As I had never heard of inverting and non-inverting inputs at that point how would I have known otherwise. Incidentally their circuit diagram had ignored the actual power connections.