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slackjack

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Everything posted by slackjack

  1. Since I cant use a digital voltage indicator mayb I can opt for a bunch of LEDs to indicate the voltage. Mayb one likethis would do?
  2. The reason I was getting around 21Vdc-22Vdc on the output when using 24Vac is beacuse the source I was using was already in peak voltage and not RMS ;D
  3. A few companies have some schematics here. Check and see if they have a 400W PSU. http://www.eserviceinfo.com/browse.php?id=11
  4. We just got to 20000 members. The lucky one was rogojb. Joined 09:54:42 PM
  5. Now lets say I wanted to make a digital voltage indicator to tell me my output voltage from the power supply and I wanted to power the indicator from my power supply. If it uses 5V would it be safe to setup some sort of voltage divider across the .1uF capacitor? The digital volt meter here has a range up to 1999. This is way more than I need. Are there any other low power ones that I can use with a smaller range that fits my purpose?
  6. So you recommend that I use a 120 ohm(for LM317) instead of the 240ohm? And with that I must change the pot to a 2.5k right? Why wouldnt the 5k pot suffice with the resistor change? Also on multisim, using a 24Vac, I get an output of about 21Vdc and not 32Vdc. ???
  7. I know that the 4k7 is a 5K-Ohm Linear Potentiometer from radio shack (part number 271-1714 as seen on http://www.uoguelph.ca/~antoon/gadgets/rs.htm ) Berfore I build my projects I always simulate using multisim or spice. Well on multisim I determined that a 5k pot only gives a max output voltage of around 14V-15V. However with a 10K pot, the max output is approx 25V. Mayb the schematic needs to be changed because I'm pretty sure I did the simulation correctly. I have determined that a 10K pot is the best alternative to the 5k pot. First graph is 5k pot and the second is 10k pot. I also noticed that multisim has LM317AH, H, K, LM, LZ. I tried the LM317LZ and LM317LM and both proved the same results. WHats the difference between all these LM chips stated above? I tried uploading the multisim file, but that file type is not allowed so I've uploaded as a JPEG. thanks again.
  8. Several emule links are in German for the april edition too :-[
  9. You can try this one. I've never used it though so I hope it works well. http://www.tucows.com/preview/348282
  10. Just another question regarding the schematic. What is purpose of putting the 2200uF and the 100nF capacitor in parallel? Do they act as the filter? Why two of them?
  11. Thank you. ;D Does the LM317 amplify the input voltage in any way? If I decreased the transformer output voltage, then the max output volatge from the LM317 decreases proportionally? Another question - can I use a half wave rectifier instead? Since the LM317 is a voltage regulator, it should eliminate the extra ripple caused by the half wave rectifier right?
  12. I need to build a power supply to power my projetcs I am going to build. It should have an adjustable range from 0V - 32V. But I can settle for a range up to say 20V. Most of the schematics I found on the net have an input of 5V DC. Where I am suppost to get a constant 5V DC signal from ??? Its to get this 5V thats why I need to build a power supply. Now the second part of my question, is there any AC to DC power supply projetcs that take in 120Vac and meets all the requirements I stated above? --thank you :)
  13. I used the one from intelore. The trial version only allows a password length of 3. So I searched the net and got the crack. The brutforce method according to the program will take several hundred years to finish with a max passwd length of 7 (only lower case letters). So I selected dictionary crack, selected to use words with "V", and in a few seconds it found the password. Just letting you know what happend logan.
  14. Just asking- Are there any good winrar password crackers that give a good trial and by that I mean no limit on passwd length to crack?
  15. Here is a little msdoc file that may help you. Capacitors http://hyperphysics.phy-astr.gsu.edu/hbase/electric/capchg.html
  16. As an alternative you could try searching the emule network for it. http://www.emugle.com/ If you find it, copy the ed2k link into emule program to begin the download. --Good luck.
  17. You can request a trial: http://www.altium.com/pcad/trial/
  18. I remember seeing this somewhere else- a little box popped up when the "pages" text was clicked. You simply entered the page number and you were taken to that page. Mayb something similar could be used here.
  19. Muhammad , firefox has a tabbed browsing feature that allows you to open multiple webpages in a series of tabs(ctrl-t). Mayb you can give it a try and see if something similar happens with firefox. btw, firefox is a great alternative to IE.
  20. I'm guessing nobody wants to read all the way to the end. Mayb a mod could edit the first post and pop the link in.
  21. Hunter. Is that Italian? Use a translation tool to go back and forth between the two languages. We usually like to keep discussions in English. http://www.google.com/translate?u=http%3A%2F%2Fwww.electronics-lab.com%2Fforum%2Findex.php&langpair=en%7Cit&hl=en&ie=UTF8
  22. There are several types of noncontact temp sensors. They all work based on a simple principle: Planck's Law of the thermal emission of radiation. http://www.temperatures.com/ncsensors.html http://evitherm.athena.as/Default.asp?ID=678&mode=html#aq8
  23. Similar http://www.inflection-point.com/jokes/29.htm
  24. Thats a fun little project. Thanks for sharing :)
  25. http://www.datasheets.org.uk/search.php?q=SM5262&sType=part http://www.datasheets.org.uk/search.php?q=SM5272&sType=part&ExactDS=Starts
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