This is a CD4049 inverter running on a 5 volt supply.

The lower trace is the signal out of the upper 2nd gen CAS
at a 50 ms period. That tranlates to 1200 RPM.

One side of the CAS is grounded to the 5 volt supply.

It still works at 100 ms or 600 RPM. It is just ticking over:)

A couple of bias resisters will allow it to work much lower than that.
The scope has a hard time working that slow. I need my other
digital scope to go that slow :)

This is only one of the 6 buffers in this chip.

Paul Lamar

This circuit works down to 400 RPM and lower. How much lower I can't test
at the moment. The 24 volt electric motor is running on only 3 volts.

Paul Lamar


The Rotary Engine News Letter. Powered by Linux.
ACRE NL web site. http://www.rotaryeng.net.
You Tube http://tinyurl.com/beqqxas.
Copyright 1998-2013 All world wide rights reserved.