Search found 341 matches

by Ron H
Sat Jan 05, 2008 10:18 pm
Forum: General Discussion
Topic: Damped Sine Oscillator
Replies: 9
Views: 1922

If this method has already been mentioned, please accept my apology. I didn't have the patience to read the entire thread. I think I would use an analog multiplier, and apply a continuous sine wave to one input, and an exponential to the other. Your damping and frequency are now totally noninteracti...
by Ron H
Sun Dec 02, 2007 7:09 pm
Forum: General Discussion
Topic: clock light
Replies: 16
Views: 3025

I Googled "craftmade" and it was the 3rd hit. They have a contact link and a customer support link.
by Ron H
Wed Jul 04, 2007 6:31 pm
Forum: General Discussion
Topic: Primitive radio types
Replies: 7
Views: 2101

Google "razor blade radio".Here's one with lots of alternate detectors .
by Ron H
Fri Jun 29, 2007 7:05 pm
Forum: General Discussion
Topic: This forum needs a...........
Replies: 25
Views: 5016

Robert Reed wrote:Some things never change.
And if they do, this forum may fall apart due to the total absence of intelligence and expertise.
by Ron H
Wed Jun 27, 2007 11:25 am
Forum: General Discussion
Topic: This forum needs a...........
Replies: 25
Views: 5016

Mr. Al, I am all for moderation being light and not stifling free interchange. However, I see this board as being unmoderated. I draw this from the fact that name calling threads have been allowed to persist and that that no one has ever been banned for a violation of the rules other than spammers....
by Ron H
Tue Mar 06, 2007 2:49 pm
Forum: General Discussion
Topic: large search coil for metal detector
Replies: 6
Views: 2063

Re: large search coil for metal detector

I recently read an article in wired as well as seeing 'best places to find treasure....' or something like that where this guy towed a huge search coil for a metal detector behind him on a quad. Anyone have an idea on how I could make a large search coil, maybe 5x5 or so to tow behind my quad to lo...
by Ron H
Mon Feb 19, 2007 9:03 pm
Forum: General Discussion
Topic: How to best control and electromagnet with sound
Replies: 16
Views: 3281

Jollyrgr, you need a resistor or a diode (connected as voltage doubler) to GND from the junction of the coupling cap and the diode. Otherwise, the cap will just charge up during the positive peaks, and the circuit will not work.
by Ron H
Fri Feb 16, 2007 4:21 pm
Forum: General Discussion
Topic: Forums ??
Replies: 8
Views: 2727

by Ron H
Wed Jan 24, 2007 9:00 pm
Forum: General Discussion
Topic: Phase shift oscillator equations way different in other book
Replies: 3
Views: 1107

Mr Al,I can't send the circuit from protolab or spice program .I will try to describe the network : it's a three resistor network with 10k in series and three caps .1uf going to ground from each resistor node and a output resistor from the resistor string ,10k going to -input of ua741. there is a a...
by Ron H
Wed Jan 03, 2007 10:59 am
Forum: General Discussion
Topic: Test for Nickel
Replies: 5
Views: 1609

Check out this site.
Also, Google "meteorite test".
by Ron H
Tue Oct 31, 2006 7:26 pm
Forum: General Discussion
Topic: Coil Question
Replies: 10
Views: 2290

Re: Exitation Inductance

Lenp: The frequency of operation is a hint. By winding the primary with 4 strands of wire side by side, the exitation inductance is reduced. From an inductance standpoint, it's like four inductors of the same impedance in parallel. This allows a faster rise time of the switching waveform thus reduc...
by Ron H
Tue Oct 31, 2006 6:56 pm
Forum: General Discussion
Topic: Transistor Logic inverting PIC UART input??
Replies: 3
Views: 1539

OPF2412 is has an open collector output. If you want to use the PNP, all you should need to do is add a 1.5k resistor from the base of the PNP to +5V in the circuit you described. I would have expected for the circuit you described to work at low data rates, but it needs the added resistor to turn t...
by Ron H
Thu Oct 19, 2006 8:42 pm
Forum: General Discussion
Topic: LED'S USED AS RECTIFIER DIODES.....
Replies: 44
Views: 8199

Hi Ron! I've missed your wisdom. Chris has this need to get in the last word. Watch. Such silence and errors, over and over and over. Duhhhaa Must be time for a snooze, the amateurs speaking. Grow up little child of naieve,....Getting it wrong must be soo right, said the resident in the WH, just li...
by Ron H
Thu Oct 19, 2006 8:14 pm
Forum: General Discussion
Topic: LED'S USED AS RECTIFIER DIODES.....
Replies: 44
Views: 8199

Armature pipsqueak? Wow, That's a phrase I never expected Tom I think that's the noise your motor makes when the brushes wear down to their carriers. :D I wonder if he was addressing me? I probably have more experience and education than he does. He also assumed I was talking about him. Maybe I was...
by Ron H
Thu Oct 19, 2006 10:11 am
Forum: General Discussion
Topic: LED'S USED AS RECTIFIER DIODES.....
Replies: 44
Views: 8199

Give it up, guys. Have you ever known him to admit he was wrong?