Search found 250 matches

by toejam
Fri Jul 09, 2004 11:09 am
Forum: General Discussion
Topic: Need a DC maker..
Replies: 3
Views: 1181

Re: Need a DC maker..

i would use a a 30 amp or better bridge rectifier hooked up to to a variac. with a 15 second duty cycle. a ten amp variac would do, you will have to re fuse it,if you forget to turn it off, it will fry, and set the voltage before you connect it (do not adjust it under load). Better yet get a 25 amp ...
by toejam
Tue Jun 15, 2004 3:42 pm
Forum: General Discussion
Topic: test circuit schematic
Replies: 5
Views: 1421

Re: test circuit schematic

e=ir
12=1000i
12/1000=.012amps or 12 ma. thats eniugh to light a led, if it changes the temperature of the nichrome wire a measurable amount i would be very surprised, but you cant go wrong by testing the circut.
good luck
tj
by toejam
Tue Jun 15, 2004 9:43 am
Forum: General Discussion
Topic: test circuit schematic
Replies: 5
Views: 1421

Re: test circuit schematic

if you wire a led in series with a 1k resistor across each switch, (minding the polarity), the led will light if there is contunity.
by toejam
Fri Jun 11, 2004 5:28 pm
Forum: General Discussion
Topic: connecting motors
Replies: 13
Views: 3033

Re: connecting motors

=red i meant
by toejam
Fri Jun 11, 2004 5:25 pm
Forum: General Discussion
Topic: connecting motors
Replies: 13
Views: 3033

Re: connecting motors

Last time i tried it it lit up a red led up pretty bright. I hooked up a red led polorized one way and a green one the other, turn it one way green other way = green. My guess at that speed about 25 ma 2v or there abuot.
by toejam
Thu Jun 10, 2004 10:49 am
Forum: General Discussion
Topic: connecting motors
Replies: 13
Views: 3033

Re: connecting motors

hi Mike.
One interisting thing these stepper motors do is to make low speed generators. Try connectong a led to them using various combinations of wire connections. It may surprise you.
by toejam
Wed Jun 09, 2004 10:32 pm
Forum: General Discussion
Topic: solar cell reverse current
Replies: 5
Views: 1383

solar cell reverse current

simple question:
When no light is activating a solar cell, it has reverse current flow. Does that current get converted to light, heat, orsomething else?
by toejam
Mon Jun 07, 2004 7:10 am
Forum: General Discussion
Topic: One Horse Power - Motor Starting Capacitor
Replies: 12
Views: 4298

Re: One Horse Power - Motor Starting Capacitor

do a google search on motor start caps. I ordered some from a company and they were about 1/3 the price the local guys could come up with.
tj
by toejam
Wed Apr 28, 2004 7:06 am
Forum: General Discussion
Topic: Damned lightbulb burned out AGAIN
Replies: 11
Views: 3150

Re: Damned lightbulb burned out AGAIN

howabout a larger wattage bulb with a dimmer
tj
by toejam
Wed Apr 28, 2004 6:57 am
Forum: General Discussion
Topic: H bridge mosfet choice?
Replies: 7
Views: 2153

Re: H bridge mosfet choice?

maxium makes a high side mosfet driver chip. i forgot the number but it should be on thier website
im starting to get my notes together if you can,t find it mention the fact and i,ll dig it out.
tj
by toejam
Sun Apr 04, 2004 4:22 pm
Forum: General Discussion
Topic: Audio Frequency Counter Recommendation
Replies: 14
Views: 3869

Re: Audio Frequency Counter Recommendation

There are several low cost vom.s available that have frequency counters in them for 50 or so bucks.I got one from radio shack.
by toejam
Fri Apr 02, 2004 2:09 pm
Forum: General Discussion
Topic: Tektronix part wanted
Replies: 2
Views: 809

Re: Tektronix part wanted

what does the part do?
by toejam
Mon Mar 29, 2004 3:15 pm
Forum: General Discussion
Topic: OUTBOARD MODULES SCHEMATICS
Replies: 3
Views: 1116

Re: OUTBOARD MODULES SCHEMATICS

hi Greybe;
What are you trying to find out about them. <p>i am trying to fabricate an ignition module for one now.
tj
by toejam
Mon Mar 29, 2004 2:49 pm
Forum: General Discussion
Topic: Continuous light dimmer sweep ?????
Replies: 22
Views: 5385

Re: Continuous light dimmer sweep ?????

do a google search on motorized variacs. Theres a bunch of em out there.Happy dimming
tj
by toejam
Sun Mar 28, 2004 7:54 pm
Forum: General Discussion
Topic: Best way to regulate a high current PS?
Replies: 8
Views: 1877

Re: Best way to regulate a high current PS?

I would look into a dc. arc welder and a 20 amp variac.
tj.