Questions tagged [reverse-engineering]
The process of taking a completed system and determining details of its design by analysing it; may have legal limitations or ramifications in different jurisdictions.
389 questions
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Speaker repair / unknown inductor/ferrite bead on speaker PSU
I'm repairing a speaker power supply (KEF LSX), and I'm trying to find a replacement for component L802 (see arrow), this is either an inductor or ferrite bead, but I'm not fully sure.
The primary ...
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Reverse engineering KN-9924LB-1-SMT portable lamp
I have 2 "HOROZ" cheap portable LED lamps with heavily degraded battaries that I want to reverse engineer for the educational purpose and also to learn how NOT to design my own LED driver ...
4
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2
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Understanding SR latch in Silicon (HD74LS279)
I am trying to gain some intuition in silicon reverse engineering. I took a microscope shot of the HD74LS279 chip which implements 4 SR latches. I've attached an annotated image of pins 13 (4Q), 14 (...
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Reverse engineering of Mercedes S-Class rear seat fans part 2: how to correctly send data through DC-LIN?
First part of the research here.
Some news about the progress of my research: the fan is running! Well, almost.
This fan operates on DC-LIN or LIN over Powerline Communication. So I built an ...
1
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1
answer
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Decreased output current capability of a SMPS
I'm reverse-engineering a SMPS for educational purpose. I had to sort it out, because one day it could not supply my Raspberry Pi 3 Model B+ any more.
First I detected, that the input capacitor C1 was ...
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Reverse engineering of Mercedes S-Class rear seat fans: how to make them work?
I'm new here, so I apologize in advance if I'm not clear. I'll do my best to clarify your questions as soon as possible.
For a professional project, my team and I purchased the rear seats of a ...
2
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1
answer
92
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CCFL no identifiers , verified working tube no other visible damage and no other components with issues, voltage detected going in but not going out
This is for a Trimble EZ GPS steering system. Essentially I am struggling to find this part my best guess is its a CTX210605-R but that is discontinued and hard to come by. (Also in the diagrams it's ...
2
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1
answer
114
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Understanding H/V sync circuit in RGBHV distribution amplifier
As a hobby project and a way to learn, I'm trying to make a 1x2 RGBHV distribution amplifier. I've got the amplification for the RGB part mostly figured out but I'm clueless on how to deal with the H/...
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Identify RF-IC in SO-8 package marked 5108195 A00 1543 GWA
Our RC controlled roller shutter in front of the window is behaving strangely. I got interested in how it works.
Could you identify that IC? It seems to do the RF stuff.
Open in new tab for full ...
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1
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Would it be worth to replace a MC34063AG with a NCP3063?
Working on a reverse-engineering work related project, one of my tasks is to research potential board optimizations. The board in mind has a DC-DC step-down converter circuit, in which it uses a ...
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Reverse-engineering this electric flyswatter circuit
I recently disassembled this electric flyswatter, and am having trouble turning the PCB into an accurate circuit diagram. I think my diagram is not far off, however I am having trouble understanding ...
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287
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How does the automatic switching function work on Nordic power profiler kit
I'm trying to understand the schematic of the Nordic power profiler kit.
One part I don't understand is the automatic switch part. I even tried to use LTspice to simulate that part, but no luck.
The ...
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1
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140
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Reverse-engineering water detection circuit
I am reverse engineering a PCB in an espresso machine and I am having trouble understanding the water detection circuit used for the steam boiler. The correct water level in the boiler is set such ...
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How can I identify the pinout of a Lenovo T500 TrackPoint module (8-pin)?
I pulled a TrackPoint module from a Lenovo T500 and would like to turn it into a standalone mouse. However, I need the pinout to get started, and I haven’t been able to find any documentation so far.
...
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Problems when probing toner cartridge chip
I've been trying to probe the pins of this toner cartridge chip with my oscilloscope to gain an insight on the serial communication protocol by soldering some thin cables onto the pads so I could ...
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