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



That's great.  This means that the ignition system will not only work
when the engine is running but also when the operator tries to start it
up.  No super duty starter or huge battery is required to spin this
thing up over 600 RPM just to get the sparks working.


 Mark LaPierre


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.