Reddit:Electronics

Mirrored a symbol in the schematic for better readability, got a phonecall, forgot to mirror the signals too when I continued. Did this botch so I can continue writing the firmware whilst waiting for the fixed board to arrive. So, how is your "Revision A" going?

Hey guys, trying to fix my buddy's Rock Band guitar because they go for like 500 on ebay. So there are two AAs in the battery holder, both are tested good at 1.5 volts. With the batteries installed, between the contact circled in red and both pins in the connector circled in blue, I get +1.5v. I would assume I should have +1.5v on one and -1.5v on the other. I also have 0v across the pins circled in yellow, and I would think I should have 3v. Does it sound like there's a short in the battery holder, or am I missing something here?

My bench desk

Bench

Next I want to look into making some registers, and maybe solder some cable with pins to act as a bus. Also want to buy smaller resistors, they are HUGE

This circuit can detect 7 different colors (red, green, blue, yellow, cyan, magenta, white) without any kind of microcontroller just with ldr and rgb led and bunch of ics like 555 timer that provides a clock pulse for 4017 ic so it can light up the rgb led with each pin separated from the other and shift register to save the data from the op amp which is connected to the ldr and bunch of diodes as rom memory and 7 segment display to show the first letter of the color.

Managed to save this from the dump yesterday. The thing apperas to be extremely rare as there is no info on it even in Russian internet segment. No ICs inside, only transistors.

I made a AND gate on a through hole board. Took a while (1hrs 30 mins) but it was worth it. Try to guess how old I am. (Hint): under 20yo.

I’m 14 and this is my electronics setup. Got into it about 2 months ago and fun fact, I did my first soldiering job today (just soldered some pins onto an rfid scanner) but it was sooo fun!!

I don't know how to program any of these chips but it's better to be curious than smart. I just ordered different ones to see what they can do. All of these boards are new besides the Wemos board.