Measuring hexacopter rotor speed with Logic Sniffer

Philip Peter has made a somewhat unconventional use of the Open Bench Logic Sniffer.

Recently we suspected that one motor of our hexacopter had been damaged in a crash. Since removing the motor requires almost the complete disassembly of the copter I started thinking of ways to test the motor in place.

In this article he describes a technique he used to measure the rotational speed of the blades of the hexacopter using a red laser as a sending unit and a photodiode and variable resistor connected to the Logic Sniffer adjusted to provide a 1 volt/2 volt dividing line between the photodiode’s dark and light states. He conducted the whole experiment using the stock OLS software jawi.

Via the contact form.

This entry was posted in hacks, Logic Sniffer, measurement and tagged , .


  1. Anil Jangra says:

    With all the work how can people keep the workbench so clean !

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