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Feature #6237

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Design + Build PCBA for NE555 based fake fan rpm sensor

Added by laforge 4 months ago.

Status:
New
Priority:
Low
Assignee:
Target version:
-
Start date:
10/30/2023
Due date:
% Done:

0%


Description

Sometimes one has to spoof fan rpm sensors.

https://www.techidiots.net/notes/fake-fan-sensor has a nice/simple design circuit. Let's build a simple PCBA around it, using parts available from JLCPCB, like

The board should have a
  • one or multiple 3-pin fan headers for the real fan (tacho line not connected)
  • one or multiple 3-pin fan headers (for jumper cables to mainboard)
    • only one of them used as power source, others have VCC disconnected
    • all of them get the same tacho signal

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