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  1. MP1

    MOVED: robotics

    This topic has been moved to Electronic Projects Design/Ideas. http://www.electronics-lab.com/forum/index.php?topic=10508.0
  2. MP1

    Code convertors

    Converting gray code to BCD does not make much sense. I think you mean binary code to gray code or gray code to binary code conversion, which is quite simple. Click on the image below for a larger view. MP
  3. MP1

    icl7106 + LCD (help this amateur girl)

    Here are the complete instructions from a kit based on this chip: http://kitsrus.com/projects/k127.pdf Your LCD display should have corresponding pins with the same markings. This instruction set is much more complete than the Intersil data sheet, and explains the voltage divider as well. Hope...
  4. MP1

    Microphone Amplifier

    Vivek, The Shure SM58 provides a positive signal on pin 2 with respect to pin 3 when pressure is put on the diaphragm (when sound hits it). Pin 1 is connected to ground. To connect this microphone to an unbalanced mixer, you just connect pins 3 and 1 to ground and use pin 2 as your signal...
  5. MP1

    formulas

    Hi Taz, Here are some links for tutorials and formulas. This should keep you busy for a while. http://tpub.com/neets/book7/25f.htm http://webtools.delmarlearning.com/sample_chapters/04.pdf http://www.technologystudent.com/elec1/tranfrm1.htm http://www.cotc.edu/rromei/Trans%20formula.doc...
  6. MP1

    request PCb' standard!

    The size of the pad will be mostly determined by the package and the hole size. You will have to figure this one out. If you want to have a 5 mil ring for solder, you have to add 10 mil to the size of the hole that will be used. This is the pad size. As a standard, through hole pads are round...
  7. MP1

    Video Distribution Amplifier

    Hi Rob, Whichever side of the board you are not using for traces, can be left unetched, (except for places where the through hole components come through it. Otherwise, everything would be connected to ground). Just etch around these holes so that the components do not touch the ground plane...
  8. MP1

    Video Distribution Amplifier

    Use of a circuit board allows you to have a ground plane on one side. This will help keep noise to a minimum since all of your traces will be as close to the ground plane as the thickness of the board. If you can't get or make a circuit board, you can attach copper foil to both sides of a blank...
  9. MP1

    PCB Etching Tank - Do it yourself

    It is actually a combination of smaller tank and more circulation from the bubbler. The smaller tank causes more efficiency of a small heater (more wattage per mass to heat up). Then you have the bubbler action which aerates and moves the water more than you would with an aquarium. Again small...
  10. MP1

    PCB Etching Tank - Do it yourself

    All of the ones I have purchased have an adjustment on the top of them. You just set it according to needs. For etching, this is usually near the top of the scale. There is no temperature sensor inside these heaters. It is a metal strip that works like a mechanical thermostat. When the heat...
  11. MP1

    Spilled beer on roland vs-1680, any suggestions??

    I usually rinse the boards and components with water, too. But watch out that you get any detergent completely off, if you use it. If left on the electronics, it could attract dust accumulation, which can cause arcing and shorts later on down the road. Also, a little compressed air will help dry...
  12. MP1

    Fiber Optics

    A lot of the toy companies are using fiber optics to transmit light. It is not the same as communications. They need no precision. Just needs the light to transmit through the fiber optic to the other end. MP EDIT: meaning visible light for visual effects
  13. MP1

    Question by your forum

    There is a Buy/Sell forum on this site. It is here: http://www.electronics-lab.com/forum/index.php?board=25.0 MP
  14. MP1

    PCB Etching Tank - Do it yourself

    The larger aquarium heaters will get hotter than this. I have actually had to watch out for going too hot in my tank. You do not want to heat up the mixture too much. Everything metal in the room will begin to rust....it is also not good to breath this. Your 32C heater is not real hot, but it is...
  15. MP1

    will the properties of ic 74ls373

    Your circuit determines how much curent draw you will have. Not the power adapter. The rating on the power adapter tells you the maximum value that is possible. If I have understood your post correctly, you have no problem. If the power adapter is capable of more than the rating of the...
  16. MP1

    will the properties of ic 74ls373

    If you have a 500 ma current limit in a circuit, you cannot use 1.3A. A resistor can limit current. You just calculate Voltage / Resistance to get the current in Amps. Did you mean the buzzer has a 500 ma current limit? The current for the buzzer is going through T1. Where in the circuit are you...
  17. MP1

    Led display Digital Voltmeter question

    lupe, A bypass cap on the supply to the voltmeter and/or a bypass capacitor on the input work well. I.m not sure how you layed this out in your design, but some bypass in one or both of these places should smooth out the voltage fluctuations. Use an electrolytic or tantalum polarized as a bypass...
  18. MP1

    IC 555 instead of IC 50240

    You don't need a lot of separation between digital and analog parts. This is why they have different ground routings. Treat the two ground symbols as two different connections, then connect them together at one single point at the chassis. The triangle symbol is normally used as a digital ground...
  19. MP1

    Hall effect sensor bypassing?

    What part of this is controlled by the Hall effect sensor? Is it the automatic clutching part? It would be good if you could get a schematic. If not, you can put a voltmeter across the input and output to see what voltage drop you have between engaged and not engaged. This will tell you if it is...
  20. MP1

    Hall effect sensor bypassing?

    What is it connected to on the car? MP
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