View Full Version : Max prop overclocking speed

05-23-2010, 12:00 AM
I was just wondering how fast the propeller's max·operating speed is? I am not talking about theoretical limits, i mean actual tested speeds. Come on guys, this is your big chance for bragging rights. I know some people have pushed it over 110 MHZ, but I'm thinking someone else has done even better.

Mike Green
05-23-2010, 12:50 AM
There's detailed information on this in the Propeller datasheet showing maximum system clock speed vs. ambient temperature and supply voltage. The data points on the graphs are tested.

05-23-2010, 01:02 AM
It hasn't been fully characterised at those speeds, though.

Leon Heller
Amateur radio callsign: G1HSM

05-23-2010, 01:25 AM
I think the fastest so far is 141.875776 MHz by me :)

See this thread http://forums.parallax.com/showthread.php?p=817374
and a YouTube vid www.youtube.com/watch?v=wbcqR8L3dMo (http://www.youtube.com/watch?v=wbcqR8L3dMo)

A lot depends on the Propeller itself, not all Propellers can do this speed and I only tried with DIP40.



PS It was by no means a scientific test it was done purely for a bit of fun....

PropGFX (http://www.propgfx.co.uk) - The home of the Hybrid Development System and PropGFX Lite

Clock Loop
05-23-2010, 03:08 AM
Next up: Liquid Nitrogen?

05-23-2010, 03:55 AM
All right, Coley here has 141 MHZ. He is the winner so far.