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  1. KrisBlueNZ

    Rain Sensor Status

    Hmm. Faulty relay?
  2. KrisBlueNZ

    Nand Gate oscillator help

    Can you post the schematic?
  3. KrisBlueNZ

    Hello, Welcome! (Introduce yourself)

    I know, thanks. I use the "traditional" emoticons. I don't really want the icon anyway.
  4. KrisBlueNZ

    Looking for a connector to use on my project

    Oh. Well, have a look on Digi-Key and Mouser. They have a very large range. You could spend hours looking. (And I often do!)
  5. KrisBlueNZ

    Hello, Welcome! (Introduce yourself)

    Now it's just your wife that you chase around the house, right? ;-)
  6. KrisBlueNZ

    Lavaguava... pixelated?

    Oh good. I see JPG used a LOT for line drawings. I just want to yell at people, "JPG is for photos! Not line drawings!" I used to use GIF for all non-continuous-tone images but I found that PNG is usually somewhat more compact. And it's very widely supported.
  7. KrisBlueNZ

    Looking for a connector to use on my project

    It may not be wise to use a connector that's used as standard for a different function. I suggest some kind of round connector. Digi-Key have a huge range - see...
  8. KrisBlueNZ

    Lavaguava... pixelated?

    That looks nice Gryd3. You may find that saving it as a PNG file gives a crisper looking result and/or a smaller file size; JPG is intended for continuous-tone images such as photographs (the P in JPG is the clue here!) and you need to use a high quality setting to avoid compression artifacts on...
  9. KrisBlueNZ

    Can I use a resistor as a fuse?

    Hi garublador and welcome to Electronics Point :-) Please, introduce yourself on the thread at https://www.electronicspoint.com/threads/hello-welcome-introduce-yourself.223920
  10. KrisBlueNZ

    Can I use a resistor as a fuse?

    Of course, it won't. Unless it's a superconductor, maybe! You mean, fuses? What's the rating? They're only marked with a black stripe.
  11. KrisBlueNZ

    Hello, Welcome! (Introduce yourself)

    Hi there and welcome to Electronics Point :-) What is your interest in electronics?
  12. KrisBlueNZ

    Teac LPU190 with digital display not turning on

    Oy vey! That looks tacky! Can you start by showing us some photos of the general layout and the circuit boards. Also, what are the markings on the clock IC?
  13. KrisBlueNZ

    Is there any way to fix transistor voltage drop?

    Are you still using your original circuit from post #1? So with the BJT's base disconnected, the voltage at the bottom end of the LDR is normally less than 1V and jumps up to nearly the full supply voltage when the LDR is illuminated? That sounds OK, although the base voltage should really be...
  14. KrisBlueNZ

    Low Pass Filter design

    The LM2917 looks like a really good option. It has a frequency-to-voltage converter and an uncommitted op-amp/comparator driving a transistor, which can be used as a threshold detector. There's a circuit to do exactly that in the data sheet for the LM2907/2917 at...
  15. KrisBlueNZ

    Hello,everyone!

    Hi and welcome to Electronics Point :-) "banggood"? Sounds like an unimaginative Chinese rip-off of sparkfun! Spark --> bang; fun --> good. And it is! And their logo has the little smile from the Amazon logo. Are they copycats or what?!
  16. KrisBlueNZ

    Rain Sensor Status

    LOL but that's not true. You've been very careful with your PIC-based control board, and you've caught a lot of problems before they became problems. Just imagine how many problems there must be in there, that you haven't caught! Just kidding. It's practically impossible to do any non-trivial...
  17. KrisBlueNZ

    Rain Sensor Status

    Hmm. I guess that's an "oops" for me. Sorry about that. The DC voltage should drop somewhat from 37V when the relay coil is passing current. Say it's 35V and you want 24V across the relay. The simplest answer is to put a resistor in series with the coil. The resistor will drop 11V, so the ratio...
  18. KrisBlueNZ

    Need Some Help Figuring Out How to Use the PDSP2112

    You have -CE tied to VCC. That won't work at all, because it's active low! You MAY be able to tie it low, but that's not how the display is supposed to be used. If you look carefully at the timing diagrams in the data sheet you'll see how it is intended to be used. What will happen if -CE is...
  19. KrisBlueNZ

    How can I splice a barrel jack extension cord (DC) without blowing anything up?

    The funny UR symbol is the Underwriters Labs trademark. Underwriters Labs tests components and products for safety, for the insurance industry. That symbol means that they have type tested that cable - probably for heat and fire resistance and voltage withstanding properties. Other markings are...
  20. KrisBlueNZ

    Bug-finding

    Become a user of the product. Try not to consider it a box that you need to test; think of it as a tool to do jobs that you want to do. Real life will create use cases that you would never have dreamed up on your own. If possible, become familiar with similar products from other manufacturers...
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