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  1. MP1

    Voltage Multiplier

    Hi Clark, Welcome to the forum. The little power plant from a computer fan sounds interesting. I hope that you will continue with the project. Is it possible for you to display a drawing of what you have made? I am sure others will take an interest. Please do not be discouraged from comments...
  2. MP1

    Portable PIC Programmer question

    You would not have the shut down/current limiting feature, but yes, most development boards for micros are built around one of the 7805 regulator chips. It will work fine for regulation. MP
  3. MP1

    components swap

    Dazza, I just now noticed your reply. Please do not be offended. You misunderstood. I was trying to get the same point across to you. In your original post you said, "...I think maybe members that have a certain amount of post maybe 50 or 100 would be allowed to make a swap, at least you would...
  4. MP1

    Track thickness details

    You do not need to calculate this manually. You can get free calculators for all of the different PCB parameters at http://www.ultracad.com/calc.htm The formulas are in the calculator screen shots if you still want to do this the hard way. MP
  5. MP1

    7 segment pressure gauge help? Modify voltmeter from Projects?

    Hi John, The data sheet has information regarding resistor changes needed for different ranges. This is a pretty versatile chip. MP
  6. MP1

    Power Supply and battery life

    Ryan, The display is turned on by switch P2 so that the current consuming display is not always on. The circuit uses very little current. I think you will have the hardest time finding the mercury switch since most companies have quit making them. You can directly contact the author of the...
  7. MP1

    Shift Registers

    Adam, Here is a basic diagram (below) of a 4 bit shift register made from 4 D flip flops connected in series. The parallel output is displayed at D,C,B,A. To understand the logic of this circuit, assume the output at Q of each flip flop is at logic 0. When a clock pulse is applied to the SHIFT...
  8. MP1

    components swap

    I think this would be most appropriate in the buy/sell area of this forum. Why not post your trades there? As far as trusting someone more who has 50 or 100 posts, I do not follow the logic there. If someone talks a lot it makes them more trustworthy? I do not feel this site should bear the...
  9. MP1

    Schematics Variable current 12v 60A to 0A

    Yevgeni, I think you have misunderstood about the need of approvals. MP
  10. MP1

    Ps2 Mod

    Flux is a liquid that you should already know about from your previous soldering experience. It is short for "solder flux". It provides a better solder junction as it cleans the oxidation from the copper surface. Use keywords of solder flux in your browser to find many outlets for it. If you are...
  11. MP1

    Garage door Status Indicator

    sasha, I think they are kidding with you a bit. Please look in our projects section for wireless circuits. There are some in there. At the top of the page is a link to the projects section. If these are not what you are looking for, try the web with key words Infrared transciever or IR...
  12. MP1

    The thickness of inner conductors differs?

    Shahriar, The cable you have looks like a balanced cable, which would have a positive signal on one lead and a negative on the other, while the shield holds the ground. But, your cable is not balanced because the wires do not have the same number of strands. Because of this, you do not have the...
  13. MP1

    Ps2 Mod

    Atheos, It is not too bad if you look through a magnifier and use plenty of flux. The flux will make the connection solder faster. Then when you clean off the flux you have a very nice looking solder connection. If you have too much solder and find that it connects multiple pins, you can use...
  14. MP1

    7 segment pressure gauge help? Modify voltmeter from Projects?

    Look in our projects section for the digital voltmeter project. This sounds like it is exactly what you want. MP
  15. MP1

    interface circuit with computer

    Please continue this in the microcontroller area if it has turned into a microcontroller project. Thanks MP
  16. MP1

    timed circuit

    This kind of circuit is not simply a timed circuit. You need a clock circuit which will trigger something at preset times. Look for clock circuits using gates. MP
  17. MP1

    HELP on Simple Project (POWER ON DELAY)

    Since you have mentioned that you have already made the circuit you want with DC voltage, why not use the DC circuit to power a relay which turns on the 220VAC after 3 minutes? MP
  18. MP1

    3-Axis Stepper Controller

    Excellent job! Looks nice. MP
  19. MP1

    funny phrase

    Wrong... MP
  20. MP1

    Log voltmeter

    Lou, I have not seen the project you are mentioning, but when you find it, please post it for others. Thanks, MP
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