RCEXL tachometer - alternative firmware - RC Groups
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May 23, 2011, 05:20 PM
Registered User

RCEXL tachometer - alternative firmware

I made successful test with (new my own) alternative firmware into original hardware. Programming was via ICSP. Main difference is using all 4 digits for RPM value - the range must be lower, approx. 1000-9999. (this means x1, not x10). My gas engines are happy with this range, they don't need 10k or more The second difference is the addition new function: max. RPM - is shown approx. 3x per min.

I suppose that hex file or source code (maybe) I will publish it for all who is interested. Here are 2 videos:

RCEXL Tachometer (prototype with alternative firmware) (0 min 47 sec)

RCEXL Tachometer (hardware) with my own alternative firmware (software) (0 min 12 sec)

Any comments or suggestions are welcome.

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Sep 30, 2011, 03:37 AM
Registered User
more info about tachometer is now on web:

direct hex file is not possible to upload here and zip file you can download from web:

Oct 04, 2011, 02:38 PM
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MoFl's Avatar
Thanks for sharing!

Your first link is not working, but I could find the info, here's the corrected link.
Oct 12, 2011, 01:26 PM
Registered User
You are right, thanks for info. I overlooked that length of URL address was automatically reduced. The first link is also valid now.

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