Questions tagged [reverse-engineering]

The process of taking a completed system and determining details of its design; may have legal limitations or ramifications in different jurisdictions

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Determining Suitable Replacement Transistor?

I have a toy which developed a short, and one of the transistors on the board is now fried. I've removed the shot transistor, along with the part of the toy which was shorting out, and everything ...
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2answers
2k views

Pinout of a 3 wire magnetic card reader

I got given a piece of electronics to take apart that has a magnetic swipe card reader built into it. Upon taking it apart the card reader itself (which appears very much like a tape deck head) seems ...
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2answers
348 views

checking solar panels current

I have some solar panels, that I don't have any information about it. How can i measure how much current it is able to deliver? With my multimeter under the sunlight? Can I test it with a light bulb ...
5
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2answers
127 views

Determine Attributes of an LED

I have some devices which have purple LED's in them. I need to make another one, but don't know anything else about the LED to buy more. How can I determine the forward voltage and maximum current ...
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6answers
3k views

Monitoring two serial lines at the same time

First this is the setup: (please note that one of the grounds is not connected, both FTDIs working properly) Now, I have used PuTTY to look at these two serial streams, both exchanging data at 9600 ...
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1answer
345 views

How to reverse cellphone firmware

I want to get full list of supported AT commands and other undocumented codes for some cell phone. I found that using strings command (on linux or win alternative) ...
5
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5answers
588 views

Identifying the SPI master

I'm trying to reverse engineer the SPI communications between two chips. But, it's not clear who's master and who's slave. I've found the chip select. Without lifting any pins or cutting traces is ...

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