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1 vote
1 answer
124 views

Custom i2c with Arduino UNO

For educational purposes, I would like to write my own i2c protocol. Is it possible to write a custom i2c library to communicate using regular ports, or should I use the SCL and SDA ports? Can I mimic ...
Anton Tsvayer's user avatar
6 votes
2 answers
544 views

Is it possible to make an OFET in a home lab?

Is there a way to build an OFET at home? (low tech, no deep vacuum and plasma, without toxic/hard to dispose chemicals) What can be the minimum budget for that? While conductive polymers are pretty ...
Puh's user avatar
  • 121
3 votes
1 answer
271 views

Is this a valid design of an audio power amplifier with bipolar transistors and no capacitors?

I'm concerned about input/output capacitors in power amplifiers and their destructive impact on the sound-wave. In my understanding, for simple transistor DIY amplifiers you'll need a really big ...
Testik's user avatar
  • 33
0 votes
1 answer
158 views

Astable Multivibrator using BC549s not oscillating

I just recently started learning about electrical engineering stuff, and since my final goal of building a Z80 Computer seems a bit far away, for now, I decided I'd make a simple clock I could ...
Pixel Brush's user avatar
0 votes
3 answers
305 views

Troubleshoot DIY AM radio

I need help troubleshooting my DIY radio. I am following the schematic this link. See pictures below for a diagram of how the components are wired and the actual wiring. The design I made is different ...
Adrian's user avatar
  • 3
2 votes
2 answers
379 views

How to choose a substitution transistor for a feedback amplifier?

I'm experimenting with RF feedback amplifiers (this topic is well covered in "Experimental Methods in RF Design" book, if anyone would like to know what that is). Particularly I'm interested ...
Aleksander Alekseev's user avatar
2 votes
1 answer
621 views

Guitar pedal works by itself but not in a signal chain

I just built a clone of an LPB-1 pedal, as my first ever guitar pedal project. It works great between my guitar and amp with no other pedals in the chain. When it is placed in a chain with pedals ...
Precipitato's user avatar
1 vote
1 answer
245 views

SMD transistor die vs DIP transistor die [closed]

Is the die of SMD transistors different from die of DIP transistors with a unique part number? Is the power transmission of a transistor dependent on its package type or chip type ?
mojtaba's user avatar
  • 63
1 vote
1 answer
389 views

Electronic Temperature Control Sound Light Alarm DIY Kit - how does it work

I bought a DIY Kit off ebay (the board says www.icstation.com ICSK061A), and lo an behold, it does not work. I could not figure out what the trouble was, so i simulated it in LTSpice, but i got no ...
loonquawl's user avatar
  • 220
5 votes
6 answers
5k views

Would it be possible to make a solid state transistor by hand?

I am curious, would it be possible to fabricate a modern BJT/FET transistor with hobby/garage tools only if size and aesthetics was not important? Which materials would one use and how would one ...
Mr. Developerdude's user avatar