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  1. 73's de Edd

    Photo sensitive circuit

    Right-o . . . . Full power through . . . . put on your shades and hope that you are not epileptic prone . . .
  2. 73's de Edd

    Photo sensitive circuit

    The application info clarified the LED situation . . .up to that time it was just interpreted as a common, puny little single LED. PLUS up to this point . . . . I was thinking of this as having daylighting being the light source.
  3. 73's de Edd

    Photo sensitive circuit

    Now you are a' cookin' . . . the distinct relay pull in and drop out thresholds solve the shifting / transitioning dawn and dusk light level situations . Increasing R3 value can increase your light threshold sensitivity if needed. Likewise, IF required, the tailoring of the gain of the Q1-Q2...
  4. 73's de Edd

    Portable Power Supply

    My Reads . . . . . It has the standard lithium cells in it Meaning 3.6 VDC per cell Then I could use an arduino to turn on and off cells, for example if I needed 2 volts, I could just use one battery. One battery does not equal 2 volts Li Ion cells need special / extreme pampering, they...
  5. 73's de Edd

    looking for a suitable transformer

    Sir fosgate3 Looks like your unit IS being the large multi battery capacity unit After seeing your complete unit, I don’t think that there is going to be a transformer involved. I do think that your BAMMMMM-BANGEN-FLASHEN is being related to my YELLOW oval circled component. It can...
  6. 73's de Edd

    Photo sensitive circuit

    Sir Bruce Puana . . . . . Taking into consideration the max current spec of the 3904, try a 40 ohm in place of the 300 and see how close you can then come to that lamp voltage, within the limitations of your present 3904's choice of utilization. Is a less power hungry . . . LED . . ...
  7. 73's de Edd

    Battery help!!!

    Must be a flat pack Li Ion then and I haven't had very good luck with them. At least on the Rasbperry photo you can see the small charge power controller board on the very end.
  8. 73's de Edd

    looking for a suitable transformer

    Sir fosgate . . . the Third . . . Meaning that this is being a Ni Mh type battery charger . . . . while dear ‘ole dad got the Li Ion family on his new unit. My choice also, as my NiMh’s get depleted by inherent internal leakage within 3 mos, while I have had multitudes of Li Ion units at 50%...
  9. 73's de Edd

    Battery help!!!

    Feel out the batteries . . . as to their being 3 cylindrical cells side by side.. That seems to be three series arranged AA Ni MH cells making up the unit.
  10. 73's de Edd

    motor run-capacitor testing and identification

    Sir brotherscott . . . . . Mamma mia that’sa being’a Italian numbers’sa . . . . . how’sa you clazee Amellicans say: 6 decimal 3 microfarads at 450 volts And it’s using polypropylene dielectric materiel , so it should be stable. If you are wondering ? if its shorted . . . . . try this...
  11. 73's de Edd

    Monitor Won't Power On - LG Flatron L1751S-BN

    Sir hotmaildotcom1 . . . . . I believe that you are fully on track now . . . . thus . . . . . you now seeing our need to thermally PROD the lazy capacitors into enough action, to keep the set runnnnnnnnnnning for our then being able to evaluate them. Will prep up some tech referencing for you...
  12. 73's de Edd

    Garage Door Opener Remote - Soldering

    Sir dougand3 . . . Your top unit suggests of being 2009 vintage and more sophisticated design than the lower one of 2011 . The master, lower one also suggests of piecemeal job assembly done by mamma-san on her back porch, on a QC evaluation of the unit. Both are using stable SAW referenced...
  13. 73's de Edd

    Help With a LED Clock Kit Please

    No sign of that intereconnecting foil link path having EVER been there. Not being so chancy, I would have gone for an intermediate current limiting resistor initially. The piezo needs its cover peeled off. 73's de Edd
  14. 73's de Edd

    Monitor Won't Power On - LG Flatron L1751S-BN

    Sir hotmaildotcom1 . . . . . Greetings . . . . . you're ba a a a a ck. Oh ye of little faith . . . you haven't the SLIGHTEST idea . . . of the manner on which I am proceeding, in permitting you to perform an almost instrumentless "seat of the pants" analysis of your units problem . OK...
  15. 73's de Edd

    Brake light flasher (555 - based) circuit works on breadboard, but not PCB

    Sir domiflichi . . . . . You ended up with a faulty board in the respect of not knowing . . . . that what should have been a closed circuit was ending up with a gap . . .yet with two rounded ends creating that gap. THEN this is all being hidden under DARK, resist so that one would not even...
  16. 73's de Edd

    ID a motorola diode

    Sir Doug3004 . . . . . I've seen one or two diodes . . . . . and those cryptic numbers mean nothing to me , 0ther than the 57 58 numbers tying well into the hey-day of carbon composition resistors. The 767 mv Vf spec tells us that you have a silicon diode. In those days even our workhouse...
  17. 73's de Edd

    Yamaha T-60 Tuner

    Sir SteveKnoblock . . . . . Thats upon a verge of unobtanium documentation, but thanks to an old colleague of mine well known in the antique radio restorations world . . . . Dave Wesserling . . . . has just provided me its schematic, from deeeeeep down within his archivial cobwebs. Your...
  18. 73's de Edd

    Peel-off paper sticker circuit?

    Your unit shown is just the much simpler passive security / anti theft tag for shoplifting deterrence. The more sophisticated RFID tag has a micro sized I.c. included . In it's situation, the tuned loop will pick up RF energy from a scanner tool, that provides power to take the very specific...
  19. 73's de Edd

    Please help with Kinetic Audio Amp

    The way the unit is now wired, will give you 16 ohms if a jack is plugged into the first picture. If you lift the B wire going to its present BLACK 4 ohm output connection and move it up to the Grey 8 ohm output connection and leave the prior BLACK connection unused. You will then have 8...
  20. 73's de Edd

    Quick question about trace connections

    Sir theslink2000 . . . . The black blobs are VIAS or feed thru holes to connect to circuitry on the other side of the board. I also am not having good enough definition, but an ohmmeter would be your answer machine. Just looking, 9 might be a no connect and I wonder about 12 and 14 also, as...
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