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  1. MP1

    Need cross for diode 1SS82

    The diode/capacitor set make up a VARACTOR, or varicap. Although these used to be made up from the individual parts, you can purchase them in a single package today. A varactor is a diode that behaves like a variable capacitor, with the PN junction functioning like the dielectric and plates of a...
  2. MP1

    Who is using the oldest computer?

    calorock, welcome to the forum. Yes, I agree. The TI99 was a good platform in it's day. For a long time, I did not have a storage device on mine. If I wanted to run a program, I had to write the program complete each time I powered up the computer and then run the program. Of course, this really...
  3. MP1

    Dual Lab Power Supply

    Darrin, in answer to your question, you can order different configuratuions of transformers from the manufacturer. However, on a hobbyist level, it would not be very cost effective for one off. You can use multiple transformers to achieve the same results and less cost. MP
  4. MP1

    RF Houselight control

    GPG, please explain your post. MP
  5. MP1

    RF Houselight control

    stu, Have you seen the one in our projects section? http://www.electronics-lab.com/projects/motor_light/037/index.html Does not look like it will take much modification to fit your needs. MP
  6. MP1

    Electronic Stethoscope

    prateeksikka, What did you try in all this 3 months of working on the circuit? MP
  7. MP1

    Led display Digital Voltmeter question

    How will you power it? You should use a different power supply to power the circuit. The device you are measuring will be your power source. MP
  8. MP1

    DIO Protection

    The MOV might be the best choice since you are only using 3 volts. Yes, you will have a voltage drop across the resistor. You must always have a larger input than the zener voltage to make this workable. Your voltage drop will be the value of Vinput - Vzener. This voltage drop divided by the...
  9. MP1

    Boosting Regulator Current/ATX power supply

    Yes, I also have a laptop with Win 98 SE. It works in mine also. There was a lot of difference between win 98 1st and 2nd editions. I had 1st edition at some point but I cannot remember what I did with it. Probably threw it away. The second edition is much larger. I think of the second edition...
  10. MP1

    Audio Amplifier from Scratch

    congratulations quantum!! ;D It is good to hear of your success. MP
  11. MP1

    Boosting Regulator Current/ATX power supply

    ante, I do not think screen dump is supported in Win98 1st edition. MP
  12. MP1

    Oscilloscope testing module (huntron circuit)

    oldractech, You can display the schematics in your message by attaching them in the post message window. You would attach the file by browsing for it on your computer. What concerns you about the circuit that you mentioned in the original post? Does it not work? Have you built it? MP
  13. MP1

    Selling ez80 Acclaim! development kit

    7-11-2004 NOTE: The item has already been sold on ebay. MP
  14. MP1

    Bench Test Equipment

    I purchased a madell power supply not long ago and found that the company imports directly from China. The banana jacks were smaller than the standard that is normally found on test equipment. I had to open the box and perform modifications from the start. You should ask the seller lots of...
  15. MP1

    Free sample chips!

    http://www.smallparts.com/ MP
  16. MP1

    Winding your own Transformer?

    Yes, please post as many sources as you have. Thanks, MP
  17. MP1

    Device to scare mosquitoes..

    Rhonn, I agree with audioguru. I have not seen an electronic device which works well with mosquitos, either. Here is an interesting article also. This is also not an electronic device, but perhaps you could make an electronic device to distribute it. This might be similar to what audioguru was...
  18. MP1

    A new Ideas?

    Someone has already made this device with a PIC. It is here: http://www.compsys1.com/workbench/uWEB/uweb.html#uweb Looks like an interesting kit. MP
  19. MP1

    Pulse Width Modulation

    ...and here it is for better view for the group. No, I did not read the complete article. It reads like a sales pitch. MP
  20. MP1

    Winding your own Transformer?

    mitesh, it would be good to hear about your experiences with winding transformers and the changes that your friends made. Have you seen the article on our website regarding this? It is here: http://www.electronics-lab.com/articles/transformers/index.html Also, do you have some sources for the...
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