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Everything posted by hotwaterwizard

  1. Try These Links! http://sound.westhost.com/articles.htm http://members.tripod.com/valveaudio/Membuatsendiri.htm http://members.tripod.com/valveaudio/INFO.htm
  2. Remember the old 150L Zapco Amps? They had a seperate PWM in a seperate case. Those Amps sounded Great. And Guess what? They didn't use Mosfets. Why did they stop building Amplifiers out of Discrete Transistirs anyways? I just don't get it. Everyone claims that Mosfet is better than Bipolar. Yea, take a static sesitive device and stick it into a power supply that has stray electro-magnetic fields all around and expect it to work better than something that doesn't need a Static wrist band to replace. How can it be better if just a touch can fry it in a second?
  3. Mine cost me $20 at the auto parts store and it did not have the safety built in. It was real easy to wire. I used it to turn a presasure washer on and off from 300 feet.
  4. You could just keep it simple. Try a Transistor Switch. http://www.rason.org/Projects/transwit/transwit.htm
  5. There are a few out there with Circuit Board Drawings included' http://www.uoguelph.ca/~antoon/gadgets/glow.htm http://www.csucsposta.hu/kvarc/model/glowplug/glowplughu.html
  6. I found a Simular Circuit in this Datasheet on the last page. The values should work with the L78xx. http://www.linear.com/pdf/1038fa.pdf LT1038.pdf
  7. Here is the complete Datasheet. for the L78xx Datasheet Click Here L78xx.pdf
  8. Yes You could use a remote starter for a car. You can get one at most Auto Parts stores. The 12v to operate the reciever can be tapped from the Computers Power supply. The remote will control 3 things in a car and the relays are already built into the Control Box. The controls open the door locks and lock the doors. Open the trunk and lock the trunk and Finally Start the engine in the car. Are those enough controls for you?
  9. Here is a page out of: Forrest M. Mims III Engineer's Mini-Notebook Basic Semiconductor Circuits.
  10. Looks Like this is his first Post on our board Here is the Link to the project he is refering to: Smart Card PC Emulator JUST CLICK HERE
  11. I use to sell these Amplifiers at the Flea-markets. It is a subject I hav had many conversations about. I saw this tiny Equalizer with 400 watts printed on the case. This thing was only about 1 inch thick and it weighed about 16 ounces. No way could this thing put out 400 watts. Just for fun I bought it for about $10. I took it home and opened it up. I looked up the audio output IC's inside and Guess what? Each IC was 20 watts Peak Power. I thought to myself How did they arrive at the 400 Watt Rating Printed on the case? Then the answer hit me! 20 watts + 20 watts = 40 Watts x 10 bands on the Equalizer = 400 watts. They were wrong of coarse but that is how the CHEEP GUYS do things. The only way to find out what an Amp really puts out is to look up the parts in the power supply and output also see what size wire and fuses the manufacture uses. Take the fuse size and use Ohms Law to figure out the rating Watts Used Ect. Example 12vdc x 20 amps = 240 watts Peak Power Max. 240 watts/ 2 channels = 120 watts Peak Power Per Channel. 120 / 2 = 60 watts per channel Approximate.
  12. Still looking I found an Owners Manual http://www.yamaha.com/menuitems/manuals/yec/DSP-E492.pdf MANUAL_Yamaha__Amp_DSP_E492.pdf
  13. Great site too bad they won't let you download anything anymore!
  14. Hey Kasamiko how do you post a request on this website? http://servis-manual.com
  15. Having a hard time with this one. Found this though! http://www.remotecentral.com What is a ccf File? symphony communications configuration file I believe it is so you can put the info into a PDA hand held device. http://glossword.info/term/5da45cadae60aa5daa,,xhtml
  16. Mixos I'm catching up to you! I am almost at 200 and this post will get me a 198.
  17. Everyone is welcome to use my chat room! It is a Type and Talk Chat room. If you have a microphone on your computer you can talk to eachother! http://groups.yahoo.com/group/freedatasheets/chat
  18. Can you really tell the difference? Most people can't. How about 4th order 6th and 8th order crossovers. Check out this cool Crossover Calculator. http://www.carstereo.com/help2/Articles.cfm?id=13
  19. Use this to hook up to the Night Rider Project in our Project Section Then hook up the BCD Decoder and the Digital Display. The Datasheet for the 7447 can be found here. http://www.ee.washington.edu/stores/DataSheets/74ls/74ls47.pdf
  20. You could use a sequencer with this type of circuit to do the job. Hook something like this to the PROM Circuit. The Resistors are 1k ohm
  21. Here are a few links. http://tech-www.informatik.uni-hamburg.de/paper/2001/SA_Witt_Hartmann/cdrom/Internetseiten/citeseer.nj.nec.com/65929.html http://citeseer.ist.psu.edu/fischer96efficient.html http://www.calsci.com/ArtDecode.html http://www.ece.utexas.edu/~touba/research/tcad01.pdf http://ee.tamu.edu/~pabhiram/ieee.pdf
  22. It is an SCR here is the Datasheet. XL1225_SCR.pdf
  23. This is a Low tech solution. Run the water into a clear plastic covered pond and let it stand for a while. The sun will warm it up. Then use a temperature controller to monitor the water and release the colder water while introducing the warmer water untill the desired temperature is aquired.
  24. Should I make another one? Maybe Dc motor with a wireless Remote control?
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