Search found 3 matches

by Michael Craft
Thu Jun 26, 2008 4:20 pm
Forum: General Discussion
Topic: Very simple but odd battery charger. Need assistance.
Replies: 4
Views: 1767

Very simple but odd battery charger. Need assistance.

Here is a schematic to an old battery charger: http://a575.ac-images.myspacecdn.com/images01/100/l_09969b14997fab47f301b5effb9280ae.jpg http://a575.ac-images.myspacecdn.com/images01/100/l_09969b14997fab47f301b5effb9280ae.jpg The charger is designed to charge a bank of large, lead-acid batteries. The...
by Michael Craft
Sun Jan 13, 2008 5:32 pm
Forum: General Discussion
Topic: Need a simple circuit for detecting a TTL-level square wave
Replies: 7
Views: 2432

Thanks for all the responses!! The missing pulse detector looks like it might work. Robert Reed: Yep, it's that simple. And I've thought about doing exactly what you've said. (See in my OP about using a HP filter.) The only potential problem is that I'd be hanging quite a few passive components onto...
by Michael Craft
Sun Jan 13, 2008 10:46 am
Forum: General Discussion
Topic: Need a simple circuit for detecting a TTL-level square wave
Replies: 7
Views: 2432

Need a simple circuit for detecting a TTL-level square wave

Longtime subscriber to Nuts and Volts here. :) I would like to build a circuit to detect the presence of a TTL-level square wave produced by a microcontroller. (I know nothing about the micro-controller... I did not program it. I'm simply trying to interface to it.) However, I can control whether or...