(11-04-2009, 04:53 PM)winmutt I like the #2 and particularly the alarm idea in #3.
My pressure sensors came in the fedex truck today. I am just going to suck it up and buy a scope since I can't find a decent one to borrow.
You shouldn't need too good of a scope if your only using it to look at the PWM output. Mines older than my Benz and completely out of calibration, but I can still find 140Hz pretty easily. Just connect your scope to 60Hz AC, mine can take up to 300V, so I just use wall power, but it shoudln't be took hard to find a transformer that outputs 5, 9 or 12 VAC. Adjust it so that 60Hz takes up 7 units on the display, then connect your PWM to the scope, only changing the voltage sensitivity, 140Hz should be 3 units.
Ich liebe meine Autos!
1981 Mercedes-Benz 300SD | 156K Miles | 2nd Owner | EGR Disabled [Removal Pending] | ALDA Removed | Straight Pipes |
GT2256V??? |
Laser Interceptor | Engine swap over summer, hopefully with GT2256V attached...
1981 Mercedes-Benz 300SD | Odo Stopped at 160K (at least 50K more) | EGR Disabled | ALDA All The Way Out | Straight pipes | FM-870 Remote Start Alarm System | B100 Biodiesel | AC Fixed x2 | Trunk crushed in
|
Retired to garage.
Excessive speeding? It ain't excessive till I redline!