Search found 4 matches

by 7474back2backcrashes
Sun Jun 22, 2003 9:34 pm
Forum: General Discussion
Topic: Novel high voltage source
Replies: 20
Views: 3100

Re: Novel high voltage source

No free lunch huh...How bout putting a lightning rod in a pond full of fish...
If your brave enough to start scooping up stunned fish with the storm cloud still over the rod then you deserve free fish... ;)
by 7474back2backcrashes
Sat Jun 21, 2003 3:18 am
Forum: General Discussion
Topic: Strain Gauges
Replies: 6
Views: 1460

Re: Strain Gauges

If you have tried op amps to boost the signal your problem may be that you used cheap ones. Also use precision resistors along with them so your voltage divider outputs arn't lazy. Get some modern good quality op amps <ie' not silicone base > ones and they will be more sensitive. btw - When using st...
by 7474back2backcrashes
Sat Jun 21, 2003 2:10 am
Forum: General Discussion
Topic: two quickie questions;
Replies: 6
Views: 1375

Re: two quickie questions;

Send it to David Letterman and let him throw it off a tall building. That seems like about all the spare time I get to play around with stuff anymore. :(
by 7474back2backcrashes
Sat Jun 21, 2003 1:36 am
Forum: General Discussion
Topic: Model Rocket Lauch Timer
Replies: 9
Views: 1404

Re: Model Rocket Lauch Timer

I made some of the 11 second count types that you mentioned using a 555 as the clock driving a 4017 as the led count down driver. And yea, the overflow pin of the 4017 drives a relay because of the high current requirment of the igniter. You can choose any count ya want from the 4017. But it's also ...