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  1. OLIVE2222

    Integrated Circuit Substitution

    Yes clearly the aim is to have a fairly significant turnover. Unfortunately it can so be a problem for hobbyist to source some "rare"parts. There is a gap between "local" shop as radio shack, Jaycar, Maplin... and large companies who even stock 10K resistors in 100 flavors. Can be an idea by the...
  2. OLIVE2222

    Integrated Circuit Substitution

    They ask for your company VAT number, pet cats don't have one, don' t know about wild cats :)
  3. OLIVE2222

    Troublesome powersupply

    The whole setup will not allow a wide voltage range for the "child supplies". I don't remember exactly the (indeed old) LM723 specs but Vin should probably be around 3 volts higher than Vout. From 13.8v less 1.4 of the diodes less 3 volts you will have a Max output of less than 10v. Even if you...
  4. OLIVE2222

    Integrated Circuit Substitution

    It's indeed a general purpose op amp, but if you don't want to play with the pinout the part is still available at few places, as stated by Dave: http://be.mouser.com/Semiconductors/Amplifier-ICs/_/N-4frvm?Keyword=4136&FS=True...
  5. OLIVE2222

    IC chip notations...Need Help!

    edit: oups you beat me Steve !
  6. OLIVE2222

    Hakko FX-888D

    For the narrow pitch soldering Weller have "gullwing" tip with a small cavity who help to regulate the solder flow, it's handy. Don't know if Hakko offer this kind of tips. Olivier
  7. OLIVE2222

    Basic electronics query

    Hi Gerard and welcome to electronicspoint ! Other numbering can be date code, country code, ... It does't matter to repair your set so. Olivier
  8. OLIVE2222

    Keep Blowing lm13700's

    Do you add a serie resistor on the OSC out?
  9. OLIVE2222

    Bench Power Supply

    You can made a cheap fine adjustment with two potentiometers in series. One close to the nominal value and one with 1/10, 1/20 of the nominal value for the fine adjustment. You can also look at a so called tracking power supply, who both plus and minus voltages are tuned simultaneously, like...
  10. OLIVE2222

    Omega special character

    The are called Extended ASCII Codes, you can find them all here: http://www.asciitable.com/
  11. OLIVE2222

    Measuring high current with PIC

    Current drawn by other parts are almost predictable, constant and should represent only few % of your total consumption. So up to 10 amp sensor on one motor to be multiplied by 4 in place of 40amp + the avionic current can make your life easier !
  12. OLIVE2222

    Alarm Project

    If you can find this kind of box, http://www.ebay.com/itm/Vintage-Radio-Shack-Science-Fair-150-In-One-electronic-project-kit-/191224416917?pt=Educational_Toys_US&hash=item2c85dd0a95 it will be months of fun and learning's, guarantied ! I give mine few decades ago :confused:
  13. OLIVE2222

    Measuring high current with PIC

    For such current range I rater suggest a non-intrusive solution. This should make thinks more reliable and more maintainable. Here a sensor you can have a look on: http://be.farnell.com/honeywell-s-c/csla1cd/sensor-linear-current-57a-8-16vdc/dp/1796881 and the documentation...
  14. OLIVE2222

    What are these 10$ Logic Analyzers on the Ebay ?

    Bob, I mean just like a scope, where you can see signals when probed. I have used such a function with a digital scope. Maybe not the usual way of working for a logic analyzer but what I love to have.
  15. OLIVE2222

    Help with a Dayton DC Speed Control

    Having the speed controller reference can help, also a picture of the board or the module, a user manual... Maybe you need to activate the potentiometer via a jumper or a setting.
  16. OLIVE2222

    What are these 10$ Logic Analyzers on the Ebay ?

    A friend of mine have bought this one: http://www.befr.ebay.be/itm/261472449117?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649 It's work as advised, however it's not real time! he log the channels than you have to replay them. Personally I prefer 4 channels (SPI, I2C bus) but in "real time".
  17. OLIVE2222

    Searching for Linear Capacitive Multi Touch Sensor

    Yes they are resistive (good new for your french skills :)) but as the OP linked component is. It's the same product as sold by microcontrollershop.com/ but with the requested lenght. edit: OK must be under a plastic sheet, yep resistive will not work :(
  18. OLIVE2222

    Wanted: 5X 100w 20v to 30v Zener diodes or eq needed

    Hi and welcome to this forum. The (wonderful) document mention the 1N3321b as suitable, this part is available at Farnell http://be.farnell.com/solid-state/1n3321b/diode-zener-5-24v-50w-do5/dp/1862957?Ntt=1N3321B cheers, Olivier
  19. OLIVE2222

    Searching for Linear Capacitive Multi Touch Sensor

    The Spectra Symbol range is available at Mouser, including the 150mm long (5.9inch) http://www.mouser.fr/Search/Refine.aspx?N=10834217+4292984437&Ne=254016&Ns=Pricing%7c0 cheers, Olivier
  20. OLIVE2222

    Need Help With Ozone Generator Rheostat Please.

    The fan speed controller should include an SCR+a heatsink, a potentiometer, capacitors, resistors, all sized to handle main voltage. This will not be super small. What you can do is a mockup with a speed controller and a switch to turn off the second dielectric and test it.
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