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  1. Chemelec

    Transformers

    YES, "Pulsed DC" and I still remember Replacing them on numerous car radios.
  2. Chemelec

    Transformers

    And Rectified Without Filter Capacitors is NOT a Good DC Power. It will have a Lot of AC Ripple in it.
  3. Chemelec

    Help with parts for turntable / Zoetrope

    Hi BryanB, No Reply or Email?
  4. Chemelec

    Trying to make a simple LED blinker but it doesn't work...

    Use an LM317 to create a Simple Adjustable Power Supply. Or you might just use 9 Volts and Reduce the 1k resistor to 820 Ohms.
  5. Chemelec

    Help with parts for turntable / Zoetrope

    Hi Bryan, Mailing these out in a Padded Envelope, The Shipping Cost is $8.00. This is Actual US dollars, Mailed to me in a Letter. So if your interested, Send me an Email and include your Name and Address. Than I will reply to you with My Name and Address. If you want to Talk, Include your...
  6. Chemelec

    Help with parts for turntable / Zoetrope

    OK, 3 of them. One operates at 3 to 6 Volts. One is 9 Volts. and One is 12 Volts. I get a Mailing cost Tomorrow.
  7. Chemelec

    Peltier

    Good Luck!;)
  8. Chemelec

    Troubleshooting a diode voltage drop

    Put a Full Wave Bridge on the DC Input. Than it doesn't matter about Input Polarity, it will be Self Correcting.
  9. Chemelec

    Help with parts for turntable / Zoetrope

    Shipping Cost is by Weight, so I would need to check with the Post Office Tomorrow. Within Reason, How Many do you want?
  10. Chemelec

    Peltier

    I DOUBT it would work using Peltier Modules. Unless you used quite a few of them, Possibly Double Stacked ones, to get a Greater Temperature Difference. Or some HIGH CURRENT ONES. Here are Some I have. Greater Temperature Difference.
  11. Chemelec

    Need help finding a good Liquid Flux.

    What I Really Like about the Kester 1429 Liquid Flux, is If you have an OLDER Oxidized PCB, this flux can Remove the Oxidation. Just BRUSH On a little, than Rince it off in Warm Water.
  12. Chemelec

    Need help finding a good Liquid Flux.

    No I don't buy much from MG, Mostly just Cold Spray and Contact Cleaner. I use the Kester 331 Solder and Removing the Flux is easy, It Just Rinses off in Warm Water. Most Rosin Flux's are the same, But they require HASH Chemicals to remove the Residue. Even though they are normally...
  13. Chemelec

    Peltier

    Just like your Fridge or Freezer, Insulation is VERY IMPORTANT. And Peltier Modules are Very Low Efficiency, compared to compressor types of refrigeration. I would recommend at LEAST 1 or 2 inches of Styrofoam over ALL Exterior Surfaces. Try it your way and you will find it Does Not work very...
  14. Chemelec

    Help with parts for turntable / Zoetrope

    NOT REALLY, At 14 AMPS, you would need a CAR Battery to run them. I Have Motors, NO CHARGE, Just Shipping Cost.
  15. Chemelec

    Help with parts for turntable / Zoetrope

    If you had Access to ABS Sheet Plastic, you could make a FAIRLY STURDY, PORTABLE UNIT. I Have this ABS Plastic, the equipment to fabricate it. I Also have some Suitable Motors. Possibly we could work something out. Want to Talk, Email me your PHONE, The USA is a Free Phone Call for me...
  16. Chemelec

    Need help finding a good Liquid Flux.

    I use a Kester 1429 Liquid Flux for Tinning Wires in my Hot Pot and it works very good, But not sure if it is suitable for SMD. As to Solder, A 63/37 is Better than 60/40. A Kester 331 Solder is available from Electro-Sonic of Canada and it contains this Flux. But After Soldering, you MUST Wash...
  17. Chemelec

    Peltier

    OK, I Understand what your saying now. BUT How are you going to INSULATE This TANK of Water so it doesn't ABSORB HEAT FROM THE AIR?
  18. Chemelec

    Peltier

    A Fan on the Hot side is normal. USUALLY the Object is to keep the Hot Side Cool, so the Cold side can keep your FOOD Cool. So Why put the Cold side in a Tank?
  19. Chemelec

    Peltier

    Not sure I understand your comment. But you Can't put the Peltier Device in a Coolant. That would be counter productive. You can create a water cooled heat sink and Yes you can use a Tank of Fluid and a Pump to Circulate it, But it still needs to LOSE the acquired heat into the surrounding air.
  20. Chemelec

    Peltier

    It is Not so much about the Medium (Water, Liquid Silicone, Air or Antifreeze), It is How can you keep those Medium's Cool? Water is Good, If it is coming from a TAP, so Constantly Cool. But NOT Portable. Ultimately your Cooler is Surrounded by AIR and if the Air is HOT. LOT OF LUCK in Cooling!
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