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  1. MP1

    Guitar Amp

    car audio speakers usually distort too easy for a guitar amp. Sound quality is also not very good even without the distortion. You will want to use the proper type of speaker or keep the volume down. There is a schematic on our site for a guitar amp. There is also a simple one on the "red free...
  2. MP1

    Looking for simple cheap timer circuit with few minute programming increments

    If you want this to do the same thing every day at the same intervals, a microcontroller would be the best solution. After that, I suggest a clock circuit with interrupts. MP
  3. MP1

    What oscillator/clock should I use

    Maxim will give you the parts free as samples. As many as 4 each. If you are looking at cost only, go through their catalog and use as many Maxim parts as possible. http://www.maxim-ic.com/samplescart.cfm You will have to register on their site with a business name. MP
  4. MP1

    What oscillator/clock should I use

    I really do not think that the loss of a minute or 2 or 3 or more is going to interfere much with an irrigation control. There is no reason to make something like this crystal controlled and expensive for home use. I personally would make it with a microcontroller and 2 crystals, add a display...
  5. MP1

    Digital temperature control

    Hanbit, there is at least one of these in our projects section. Look for Temperature controlled fan. MP
  6. MP1

    Power Supply Meter Problem

    Woody, as I had guessed, I was not reading your diagram as you had intended. You should perform a search on the web for the data sheet of the devices you are using. To comment further, I would only be guessing like audioguru, without the data sheet. By the way, I have also found high quality...
  7. MP1

    where can i find the electric diagramm

    Wouldn't this be a service manual request? MP
  8. MP1

    Electricity

    I think all of the crossed lines are connections. This is how you normally see a text book question. Like I said, it is poorly drawn. Moving things around a little will make it more clear. MP
  9. MP1

    Power Supply Meter Problem

    I am not sure if I am looking at this right. You should isolate the 12 volt supplies if I am looking at this correctly. Check to see how much voltage is actually getting to each display under the test condition. It looks out of balance. MP
  10. MP1

    Upload error!

    I do not use rar type files, so this poses a problem for me and all of the others who, like me, have never had the need to use this file type. Rar is not packaged with most computer systems. If you attach file type rar, a viewer for rar must be on everyone's computer for them to see the image in...
  11. MP1

    Electricity

    It is poorly drawn. You should re-draw the circuit and it will become more clear. Use the parallel and series calculations for resistors and redraw the circuit. Put the 24VDC source on the left by itself. It is easier to look at this way. MP
  12. MP1

    Power Supply Meter Problem

    Woody, How about a drawing for those of us who read schematics a little better than words? ;D MP
  13. MP1

    MOVED: Need of 8086 Microprocessor Project

    Micro topic http://www.electronics-lab.com/forum/index.php?board=10;action=display;threadid=2608
  14. MP1

    PCB design and layout software

    Here are some tutorial sites for the free Eagle Layout software: http://www.interq.or.jp/japan/se-inoue/e_eagle.htm http://www.precma.com/informatica/tutorial.htm MP
  15. MP1

    What oscillator/clock should I use

    wot_gorilla, check the data sheet for the MAX038. It is a stable device. MP
  16. MP1

    Please comment on my project >< thanks~

    The amplitude of sound is simply voltage. You can use a comparator to determine the threshold at which the base of a transistor has excitation and trigger a relay from that. This is, in my opinion, the simplest method. MP
  17. MP1

    help oscillate

    Frequency Modulation is "FM". AM is "Amplitude Modulation." MP
  18. MP1

    newbie confused with voltage dividers

    Yes, if you change the load, then the current requirement will change. If you have several devices on one line which have a changing load, they will interact. You will need to supply enough current for the worst scenario for all devices so that one device does not get too little current. V/R...
  19. MP1

    Solder station

    We have a 'buy and sell" area. Post your ad there. Let's not get in the habit of placing ads all over the forum. You can point everyone to the ad. MP
  20. MP1

    Please comment on my project >< thanks~

    I am only guessing here, but it looks like you want to activate a relay with the amplitude of the sound. Is this correct? MP
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