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  1. KrisBlueNZ

    Calculating values...

    The capacitor is polarised. The polarity is marked on the side of the component. Also, the positive lead is longer than the negative lead. The resistor isn't polarised.
  2. KrisBlueNZ

    Calculating values...

    Hello and welcome to Electronics Point :-) That diagram doesn't have component values for the resistor and the capacitor. There is one clue: the capacitor has a positive symbol on one side, which means it's probably at least 1 µF. You could try a 470 µF capacitor and a 10k resistor. This...
  3. KrisBlueNZ

    Remote Control Circuit with CD4017 - counter decoder

    OK, here's a circuit description for the non-coded infra-red remote on/off controller design in post #16. There is an error in the schematic in post #16: in the receiver circuit, the CD4017BE IC is identified as U1. It should be marked U2. (U1 is the TSOP1738 infra-red receiver device.) The...
  4. KrisBlueNZ

    circuit components

    That's admirable kpatz, but introductory practical electronics tutorials with this kind of info are all over the net. It's just one Google away. Give a man an answer and you solve his problem for a day. Teach a man to Google and read tutorials, and you'll solve his problems for a lifetime. I...
  5. KrisBlueNZ

    LED's turning on if hand crosses area.

    Who are you listening to?! LOL kpatz's post is good advice.
  6. KrisBlueNZ

    Ping))) Ultrasonic Sensor

    Ah, that device does most of the work. You just generate a pulse to trigger it (set the PIC's I/O pin low, then turn it to output mode, then back to input mode) and read a counter, then wait for the device to generate a pulse in response, read the counter again, and calculate the elapsed time...
  7. KrisBlueNZ

    Remote Control Circuit with CD4017 - counter decoder

    No problem. Electronics Point should send you an email each time there's an update to a thread you're participating in. Check that you're "watching" this thread - if there's "Watch thread" near the top of the thread page, click it - and check your account preferences.
  8. KrisBlueNZ

    Help identifying component

    Great :-)
  9. KrisBlueNZ

    power board - don't know what to try

    You shouldn't be using lead-free solder. That might be why you're having trouble loosening the solder. Or it might be that the component is mounted hard against the board and the leads are bent over, so there's no "wiggle room". You could try pulling the component lead out while you're melting...
  10. KrisBlueNZ

    dot board

    Do you mean something like this? http://www.digikey.com/product-detail/en/8029/V2025-ND/1886431 You don't make them, you buy them. Try a local electronics shop.
  11. KrisBlueNZ

    circuit components

    Yes Adam, I think so. Sukinesh, find a local electronics component shop and take your diagram to them. They should be able to help. As it is, you haven't even told us where you're located, so even if we did want to spend a few hours making a list of suppliers' part numbers for you, we wouldn't...
  12. KrisBlueNZ

    Need help for a recovery project

    Hi there, and welcome to Electronics Point :-) Wow! That's likely to be very difficult, unless you can find someone who has done it before and is familiar with that model, or at least that brand. I have no experience with digital camera data storage, so the following are guesses based on...
  13. KrisBlueNZ

    Old transistor magnetometer

    I don't think TR4 is drawn upside down. You mean with the collector and emitter swapped? I don't think the circuit would work at all if you swap the collector and emitter. Good luck!
  14. KrisBlueNZ

    Help identifying component

    Yes, you're right, it's a 5.0 MHz ceramic resonator with built-in capacitors. It has an accuracy of ±0.5%. Where are you located? There's a field for this in your profile. It helps us know which companies to recommend. Digikey have the same part at...
  15. KrisBlueNZ

    Remote Control Circuit with CD4017 - counter decoder

    OK, sorry about the wait. Here's what I suggest. I'll come back and add a circuit description and component notes in a day or so. In the meantime here are the important components: In the transmitter: U1 MUST have a "U" in the suffix. This is an "unbuffered" type of gate that is needed to...
  16. KrisBlueNZ

    12v Powerbox for Camping/fishing

    You're welcome :-) Good luck! Please let us know how it goes.
  17. KrisBlueNZ

    12v Powerbox for Camping/fishing

    Yes. Many people buy digital meter modules cheap from eBay. I don't recommend it, but here's a current meter that might be suitable: http://www.ebay.com/itm/Yellow-LED-Panel-Meter-DC-0-To-5A-Mini-Digital-Ammeter-/371041555107?pt=LH_DefaultDomain_0&hash=item5663ccd2a3 This one monitors the...
  18. KrisBlueNZ

    Ping))) Ultrasonic Sensor

    So this is for ultrasonic distance measurement? And you need to generate a burst of ultrasonic signal? You're making a parking distance measuring device, are you? One way to do this is to use an output compare module to toggle an output pin when a timer reaches a certain value. You clock the...
  19. KrisBlueNZ

    LED's turning on if hand crosses area.

    You mean drop the voltage? Do you have pulldown resistors? If you're not sure, upload a schematic of what you have so far, and/or a photo of the breadboard layout. Right, but does that connect to the real earth at the AC mains socket? Right, but where is that powered from? Is there a power...
  20. KrisBlueNZ

    LED's turning on if hand crosses area.

    Do you have pullup or pulldown resistors on the inputs from the switch? That is, a resistor to pull the signal to a defined state when the switch is open? Is the circuit's common rail connected to mains earth? What is the circuit powered from? What kind of power supply? Are you wearing an...
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