Search found 543 matches
- Sun Jan 23, 2005 4:51 pm
- Forum: General Discussion
- Topic: Amplify, AD8367
- Replies: 1
- Views: 1806
Re: Amplify, AD8367
This is a 500 mHz amplifier. You have to be VERY careful with the layout. Can you post the PC board?
- Fri Jan 07, 2005 5:40 pm
- Forum: General Discussion
- Topic: Servo Amps
- Replies: 2
- Views: 2023
Re: Servo Amps
I should think any power op amp would do the job. I once use an LM324 as a servo amp for small motors.
- Fri Jan 07, 2005 5:34 pm
- Forum: General Discussion
- Topic: Zener Diode Question
- Replies: 10
- Views: 5112
Re: Zener Diode Question
Peak voltage in a 12 volt vehicle can reach 60 volts due to starter transients. I expect that a 28 volt vehicle could see 150 volts. An L - C filter will protect against those transients.
- Sun Jan 02, 2005 5:06 pm
- Forum: General Discussion
- Topic: Questions about making circuit boards
- Replies: 15
- Views: 6997
Re: Questions about making circuit boards
Look at Mouser or DigiKey for an enclosure. www.mouser.com or www.digikey.com
- Wed Dec 22, 2004 4:56 pm
- Forum: General Discussion
- Topic: vandigraph high voltage collector dome
- Replies: 5
- Views: 2959
Re: vandigraph high voltage collector dome
I was surprised to read that metal brushes are recomended and they do not touch the belt. I don't understand how that works. BTW, take note that the upper brush has to be inside the sphere.
- Sun Dec 19, 2004 4:35 pm
- Forum: General Discussion
- Topic: Electromagnetic physics question
- Replies: 41
- Views: 15420
Re: Electromagnetic physics question
The major difference between a DC electromagnetic field and an AC one is that the AC field can be focused and beamed to a remote location. Energy can be transmitted via AC fields, but not with DC (in a wireless system).
- Fri Dec 17, 2004 4:57 pm
- Forum: General Discussion
- Topic: Design Using Op Amp
- Replies: 2
- Views: 1990
Re: Design Using Op Amp
Neither of the circuits makes any sense. Where is the output of the VCCS? Certainly not at the op amp output.<p>You cannot make a bridge amplifier using one op amp. There are numerous examples on the web.<p>I can design a VCCS using 3 op amps if you are interested.
- Mon Nov 15, 2004 6:59 pm
- Forum: General Discussion
- Topic: Antenna
- Replies: 4
- Views: 2606
Re: Antenna
300 ohm twin lead was in common use years ago when signals were received by an antenna. Today, most signals come in on 75 ohm coax. If you have an FM receiver, you won't notice the difference whether you use the 300 ohm or 75 ohm inputs. With a TV receiver, you could get ghosts if you use the wrong ...
- Fri Nov 05, 2004 1:59 pm
- Forum: General Discussion
- Topic: Thermo electric coupler
- Replies: 8
- Views: 4529
Re: Thermo electric coupler
You can get information on inductive cooking from your local appliance store. I never heard of thermal electric coupler, what do you know about it?
- Fri Nov 05, 2004 1:48 pm
- Forum: General Discussion
- Topic: someone explain to me........
- Replies: 15
- Views: 6542
Re: someone explain to me........
I don't know how the new starter-less ballasts work, but if there are only 2 wires, there has to be a starter. The flourescent tube will work on DC, it drops about 25 volts when on. The trick to get it on is, raise the voltage to about 1000 volts. This is accomplished in small lamps by shorting the ...
- Fri Nov 05, 2004 1:38 pm
- Forum: General Discussion
- Topic: Magnatron question
- Replies: 3
- Views: 2036
Re: Magnatron question
From my dictionary: MAGNETRON, n. A high-power ultra high frequency electron tube oscillator which uses the interaction of a strong electric field between anode and cathode with a strong permanent magnet field to cause oscillatory electron flow through multiple internal cavity resonators. Operation ...
- Fri Oct 29, 2004 3:08 pm
- Forum: General Discussion
- Topic: Quest for part replacement
- Replies: 6
- Views: 3195
Re: Quest for part replacement
What is the operating voltage? The AD8615 has 300uV offset but has 6V max VCC.
http://www.analog.com/en/prod/0%2C2877%2CAD8615,00.html<p>[ October 29, 2004: Message edited by: Russ Kincaid ]</p>
http://www.analog.com/en/prod/0%2C2877%2CAD8615,00.html<p>[ October 29, 2004: Message edited by: Russ Kincaid ]</p>
- Sun Oct 24, 2004 5:15 pm
- Forum: General Discussion
- Topic: cold heat soldering iron
- Replies: 9
- Views: 4255
Re: cold heat soldering iron
It might be an exothermic process; welding can be done with a mixture of aluminium powder and iron oxide plus a match.
- Mon Aug 02, 2004 5:22 pm
- Forum: General Discussion
- Topic: 11.5Vdc / 12Vdc to 12.5Vdc/13Vdc
- Replies: 16
- Views: 8083
Re: 11.5Vdc / 12Vdc to 12.5Vdc/13Vdc
What makes you think the pump need to deliver more fuel? The pump is designed to pump more fuel than is needed, the excess is either diverted back to the tank by a pressure regulator in the carburator (fuel injector) or the pump itself has a sensor to shut down when the pressure is high enough. Perh...
- Sat Jul 31, 2004 7:01 pm
- Forum: General Discussion
- Topic: P.C.Board design
- Replies: 18
- Views: 8399
Re: P.C.Board design
I cut PCBs on my table saw using a metal cutting fibre disc instead of a saw blade. It makes very smooth cuts. I just bought a 4 inch table saw from Harbor Freight Tools with a diamond blade. It cut great for about 1 minute, then all the diamond was gone. I bought a 4 inch metal cutting disc but hav...