Reddit:Electronics

Last pic is the original IC that I turned into a pin-compatible IC with the ATtiny45. Figuring out the pin mapping was a fun challenge. All the code is mine, including the IR decoding which took me 3 iterations to make it reliable and non-blocking. My plan is to eventually use a better wireless comm technology than IR :)

See how to make a simple 4 bits short register on Logisim

Flex in the comments⬇️

The Varactor diode in the photo seems to have marks of overheating.

I came to this conclusion after observation with a flashlight on the back of the board.

I was led to perform this visual inspection because I concluded that a stove's control board 098-01540-35 won't turn on due to a faulty G5Q-14 relay.

I'll add more findings down the road of troubleshooting.

Just got my new peak transistor tester and showing and old vintage one from a long dead friend of mine.

Photos 1, 2: Ч1-40 (Ch1-40) DOCXO quartz frequency standard.

Photos 3-6: В7-34А (V7-34A) Digital voltmeter. 5.5 digits. Features ovenized voltage reference, fully isolated and hermetically sealed analog part.

Photo 7: С1-107 (S1-107) Hybrid portable oscilloscope/multimeter with multimeter part drawn directly on the scope tube.

It probably won't work but I figured I would try, it's a vhf transmitter circuit