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  1. BobK

    Pinball Scoring System

    This type of LCD is simpler to connect to the Arduino, just 6 wires, and about equally complicated, though very different to program for. You will be able to find Arduino code to drive either type of display that you can download and modify as needed, so I would say it is a tossup in that...
  2. BobK

    Building wiring circuit keeps tripping breaker.

    Put in another circuit. Bob
  3. BobK

    4017 & 555 Police LED Lights Project (noob question)

    Agree. They are just wasting power compared to the diode solution. Perhaps this is one of the "mistakes" your prof wanted you to find. Bob
  4. BobK

    Need a tiny tiny DC to AC inverter, or pulsed DC, ideas?

    1.5mm is pretty extreme. A normal size PCB is thicker than that by itself. I can understand why a receiver for wireless power should be that small, by why the transmitter? You can't possibly have any significant power source that is that small. Bob
  5. BobK

    Power factor correcting a cheap chinese soldering rework station

    Your electric bill will go up. Bob
  6. BobK

    Stage Line 500W amp repair project

    I hate it when that happens. Bob
  7. BobK

    Buck boost / step up circuit?

    Hi, and welcome to the forum. TI has a great little online app that will design a switching power supply to your specifications: http://www.ti.com/lsds/ti/analog/webench/overview.page Bob
  8. BobK

    Trying to find out the name of a type of component.

    There isn't a single component that will do that. Is this AC or DC? What voltage range? How much current? Bob
  9. BobK

    Can a 6v light bulb blow a 12v transformer

    Hi Erika and welcome to the forum! Possible I suppose, but more likely it would blow the light bulb than the transformer. Bob
  10. BobK

    New Member, New to Electronics, Looking for some help!

    Turning the power on and off 6 times a second might do that, but it might not. There is inertial in the vibrator motor and I will probably not start and stop cleanly in that time. But it is worth a try. An NE555 timer IC could do this easily. Bob
  11. BobK

    Converting a remote control from Battery power to DC

    OK, I understand you now. An easy way to replace the battery without modifying the remote unit would be to find a wood dowel of the same diameter as the battery, cut it to length and connect wires to small metal pads glued to the ends, then just put it place of the battery, minding that the...
  12. BobK

    Arduino: Controling LED Strip

    What kind of LED strip are you using? Most are one of two kinds: First kind lights all the LEDs that same. You cannot do what you want to do with that kind. Second kind as individually addressable LEDs, and you have to send a code of 24 bits to each LED to set it's color. If you have this...
  13. BobK

    Ammeter query-wiring help needed

    It sounds like you are trying to put the ammeter leads directly across the power supply. This is not a good idea, and it will blow a fuse or worse. To make it more explicit, here is what Dave is trying to tell you: First, wire the load to the PSU the way you normally would and insure that is...
  14. BobK

    New Member, New to Electronics, Looking for some help!

    Vibration is normally done by using an eccentric cam on the shaft. You might get it to vibrate a bit by turning it off and on at 6Hz, but it will likely not be a dramatic as the usual method. Bob
  15. BobK

    Passing a pulse around a 7400

    The article you linked describes how to connect 1 or more DHT22s to the Raspberry Pi. Why are you not doing what it suggests? Bob
  16. BobK

    Converting a remote control from Battery power to DC

    I am not sure at all what you are trying to do. The remote using a 12V battery has nothing to do with the power used by the device it is controlling. For instance, garage door openers often use remotes with those 12V A23 batteries, but control a motor that is run off the mains. Are you trying...
  17. BobK

    The input given to Piezo Speaker is an analogue signal or Digital signal?

    Presumably the output of the Arduino is simply a square wave, i.e. high half the time, low half the time. This is an analog signal in the sense that it is outputting a waveform, not digitally encoded information. If it were outputting digitally encoded information, such as serial data that...
  18. BobK

    New Member, New to Electronics, Looking for some help!

    What do you expect to happen when you pulse the current 6 times per second? Bob
  19. BobK

    What to do with old lead free solder?

    Yes, It sounds like a lack of flux is the problem. Does the solder have a flux core? If not, you must add flux when soldering. Bob
  20. BobK

    AC/DC Power Convert Questions

    Since the OP is in the U.S. I would like to point out that the colors in a line cord will not be as posted by Dave. In the U.S. the colors will be white for neutral, black for live, and green for ground. Bob
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