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  1. MP1

    How to increase reactance in a coil of few turns?

    audioguru, negativity does not help. If you have a solution, offer it. MP
  2. MP1

    Voltage display

    Hi Michael, and welcome to the forum. The code in the AtMega determines the rate of sample. I do not think there is a way to do this in hardware. Are you trying to get 20 bit resolution from a 10 bit ADC? It would be very helpful if you could post your circuit since it is a hardware question...
  3. MP1

    3-Axis Stepper Controller

    Hi katsujinsetsunin, This is the project I thought you might be referring, but I could not find the reference to using 8 volts. I think mixos was talking about the requirements for the 5 volt regulator chip. The mention of 8 volts was so that you had enough voltage for the 7805. If you are...
  4. MP1

    LM317 Variable power supply

    Jeff, glad to see you got it working. You are right, there is really nothing on this device which indicates the pins are numbered from which end. You will want to memorize this since it is standard on all devices with this package type. This will surely come in handy on another project in the...
  5. MP1

    3-Axis Stepper Controller

    Katsujinsetsunin, perhaps I did not understand your post, but it seemed to me that you will need 2 amp per motor for your CNC requirement but you wish to use steppers rated at 1.1A. How have you figured the current requirement? Also, I was trying to find the link to the board you have described...
  6. MP1

    0-30 Vdc Stabilized Power Supply

    There was some conversation about this topic here: http://www.electronics-lab.com/forum/index.php?board=15;action=display;threadid=951 gsmaster has a method that he has attached a photo. MP
  7. MP1

    Square wave to Sine wave

    Graeme, Sorry to take so long to read this, but I have attached a document that might help. The section that might interest you starts at the bottom of page 2. Hope it is helpful to you. MP Sine2Square-Square2Sine.pdf
  8. MP1

    lcd

    Vedran did not mention that he is located in Croatia. Anyone close got a LCD display? MP
  9. MP1

    PS1 Car supply

    AJB, does this help or do you still need other ideas on how to accomplish this? In electronics, there are always many ways to accomplish the same goal. MP
  10. MP1

    Mains current detection

    Darrin, good idea, the sound trigger could be connected after the switch. Of course, there would have to be another way to keep the vac on after the switch is turned off. Perhaps RC time constant. Another method around this would be to make the sound switch only trigger right at the high...
  11. MP1

    Voltage req to heat small amt of water

    Darrins, The correspondence between electric power and heat is indicated by the fact that 1 W used during the time 1 s is equivalent to 0.24 calorie of heat energy. The electric energy converted to heat is considered to be dissipated or used up. Hope it is a helpful start. MP
  12. MP1

    Winding your own Transformer?

    Bandm, Welcome to the forum! Jan, the author of that article, has stated that he would be happy to help anyone if they need. Just send him an e-mail. I have not seen him on the list for a while. MP
  13. MP1

    darlington optocoupler

    There you go, ginji. If anyone on this forum can find the data sheets and parts, it is John. ;D MP
  14. MP1

    Radar

    Pradeep, a radar circuit has been talked about on this forum before, so a search should be able to find it. If not, let me know and I will locate it for you. MP
  15. MP1

    low pass filter

    Kevin, the steeper roll-offs are only obtainable with cascaded design. The single pole concept will not give you much roll-off. MP
  16. MP1

    Mains current detection

    Paul, If it is for your saw (noisey device), why not use a sound activated switch trimmed to the sound difference of when the saw is turned on? When turned off, as the blade winds down, the switch would still be activated until the blade winds down to the quiet threshold you have set. Just...
  17. MP1

    Servo Throttle Control

    Mike, It is probably time to move to the microcontroller area with your project. Lots more AVR people there to help. BTW...I have schematics and board layouts in eagle that could give you a start (if you have eagle). MP
  18. MP1

    LM317 Variable power supply

    Jeff, with the heat sink tab on the table and pins down, your pin assignment is left to right. This should correct the problem. MP
  19. MP1

    Electronic Stethoscope

    Terribly wrong!!! audioguru. You posted a long winded page of 8 necessary changes, and you did not even build the circuit. Before you stated that this circuit could not work. Now you state that it does not work well. Others have made the circuit work without the 8 necessary changes. Why is this...
  20. MP1

    0-30 Vdc Stabilized Power Supply

    audioguru, It is just that I see your theories fail you so much. Hands on is the best way to solve hardware problems. Nothing can replace bench work. Also, it is not so clear to some that you are not building anything, but only giving theoretical advice in all your posts. I just wanted to...
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