All Questions
7 questions
0
votes
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Band selection circuit for SI4825 A10
Following the official schematic and guideline (AN738: Si4825/36-A
Antenna, Schematic, Layout, and Design Guidelines), I am building a Si825 A10-based radio receiver.
I am getting weak audio output ...
- 101
1
vote
1
answer
94
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Is there any electrical system simple enough to make yourself which has some kind of useful property like radio communication or basic computation? [closed]
I would like to make some kind of primitive system in the direction of a computer, from scratch.
Someone showed me you can use ferromagnets to do some elementary computation; the “states” are the ...
- 149
0
votes
3
answers
305
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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 ...
- 3
-1
votes
2
answers
363
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What makes it hard to build a powerful RF transmitter?
I was looking for a powerful RF transmitter lately but I didn't find many. They are low power (< 0.5W) or expensive.
I have a little understanding of a regular 433MHz transmitter's schematics. It ...
0
votes
1
answer
115
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Can I replace the 433mhz modules on my homemade remote controller with a nrf24 transreciever
I built a simple 4 channel 433mhz transmitter and reciever because I can't afford a remote controller, the range is limited to 3 feet and nrf24 transreciever have longer range, so my question is can I ...
- 101
24
votes
3
answers
9k
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What went wrong with my DIY project?
I have been teaching my son the basics of electronics by taking apart his old toys. We got to the level where we can fix things and put them back together. Last weekend we spent several hours putting ...
- 437
2
votes
2
answers
726
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Satellite detector and a mobile phone
A satellite dish with LNB connected to a satellite detector when powered by a 18v source could detect radio waves from satellites. I made one using the ppt here.
The detector, (when it was not ...
- 161