[ntp:questions] Trying to use Dimension 4 time keeper

John Hasler jhasler at newsguy.com
Wed Sep 25 16:04:50 UTC 2013


I wrote:
> I'm suggesting adding an open-collector driver rather than adding a
> network of resistors and diodes.  Fewer parts and better results.

unruh writes:
> Probably. I'm a bit worried if the base voltage is higher than the
> collector.

A single transistor with a base current limiting resistor would work
fine but I had in mind an IC such as the 7407.
-- 
John Hasler 
jhasler at newsguy.com
Dancing Horse Hill
Elmwood, WI USA



More information about the questions mailing list