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  1. Old Steve

    sample and hold pulse source?

    A schmitt trigger inverter might be a better choice, as Harald suggested in post #7. That'll 'square up' the signal nicely. A 74HC14 for voltages up to 5V, or you could use one gate from a CD4093, with the inputs tied together, for higher voltages. A CD40106, too, if you can easily get one. Up...
  2. Old Steve

    Need help with identifying this type of connection...

    And @Brad Hays, you'll quite possibly find them at your local automotive parts store as well as the places I linked to. Here we have SuperCheapAuto, AutoBarn and others. You'd have similar there.
  3. Old Steve

    Need help with identifying this type of connection...

    No it won't. They're a different connector. Not a crimp type. I'd tend to call those an adaptor. (But it might not be the correct term.) And before you come back with a male with female piggyback, I did say "they're all female, (with male in piggyback), as far as I've seen." and "I've never...
  4. Old Steve

    Need help with identifying this type of connection...

    I've never seen them described as an adaptor by sellers. The two sellers I linked to call them "Piggy back", (spade implied) and "Piggy back spade" respectively. And even 'female' is redundant - they're all female, (with male in piggyback), as far as I've seen. I've never come across one the...
  5. Old Steve

    PWM led without timer

    You could wrap it in a function, to be called with each pin number, like this:- for(int pin=0;pin<3;pin++) FadeLED(pin); void FadeLED(int pin) { int period=10; // 10mS cycles (100Hz). int mark=period+1; // Pulse...
  6. Old Steve

    PWM led without timer

    Other way 'round - decreasing pulses. I figured that was what he was after. @wdariusw 1. First up, you didn't say what the actual problems is. You merely said "It works bad....". That's not very descriptive. What is the actual problem? 2. Does your program have to do anything else? (Because it...
  7. Old Steve

    Technics RS-TR313

    There's nothing wrong with your drawing idea. :)
  8. Old Steve

    Technics RS-TR313

    I (used to) use small plastic stackable trays for this, (the clear plastic trays from individually wrapped cheese slices), with all of the screws from one stage of disassembly in each tray. Then, when reassembling, I'd just work back down through the trays.
  9. Old Steve

    PWM led without timer

    int period = 50; int i = 0; while(true) { i++; PORTB = PORTB & B11111110; // Turn LED off _delay(i); PORTB = PORTB | B00000001; // Turn LED on _delay(period - i); if (i >= period) { i = 0; } } You don't show us enough of your code, but I'd say there's...
  10. Old Steve

    I need a looping digital timer

    Price was my secondary consideration, but it's still an important one. Why throw away money on an Arduino for no reason? And more to the point, he'd have to study up and learn programming to use an Arduino. It's far more sensible to use a 555 or a 556. I'm prepared to draw the circuit, and he...
  11. Old Steve

    Need help with identifying this type of connection...

    Try here, half-way down the page. 50 for $5.40:- http://www.allelectronics.com/make-a-store/category/196/crimp-terminals/1.html Or here, 100 for $9.95:-...
  12. Old Steve

    recipe for LED salad

    Not without individual resistors, anyway.
  13. Old Steve

    I need a looping digital timer

    I still think the electric shock for under-production is a good idea. :D
  14. Old Steve

    what mosfet to use for an induction heater

    Rick, RS Components (Oz) have the STP30NF10 in stock at the moment. Only $1.84 each. They'd get them to you within a couple of days, and have free delivery for online orders:-...
  15. Old Steve

    Technics RS-TR313

    You could try Googling "cassette deck belts". ;) (You'll need to measure the length and width/diameter of the belts first, so you know what you're looking for. Do they seem loose?) You'll get results like this:- http://www.studiosoundelectronics.com/cassette.htm I used to deal with these guys...
  16. Old Steve

    Detecting a change in signal

    What he ^ said. :)
  17. Old Steve

    I need a looping digital timer

    Overkill, don't you think? I don't think he wants to become a programmer, he just wants a simple timer. How much is an Arduino Pro Mini? More than $1, I'll bet. That's about what a 556 costs. @Dexter Wilks, I'm still prepared to draw that circuit if you want to go that way. Just let me know if...
  18. Old Steve

    I need a looping digital timer

    I suggested two 555s, (a 556), rather than one because the buzzer time could be adjusted independently, but you're right, one would do it. (I just drew up a similar timer circuit for a watch winder.) And a slightly more advanced version might be better still - one that also counts the number of...
  19. Old Steve

    recipe for LED salad

    Wow, you don't want much, do you? Is this school homework?
  20. Old Steve

    I need a looping digital timer

    I imagine you want it to make a sound, so they don't have to take their eyes off the work. A 555 timer configured as an astable, set to one minute cycles, triggering a second 555 set up as a monostable, with a short period and a small DC buzzer attached would do what I think you want. You could...
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