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Recent content by RAV1965

  1. R

    Missing schematic can anyone solve this? (hot air soldering station)

    OMG!!! Sorry I didn't see that picture that show the traces before. That does make it possible to make the schematic and do this project. I may be asking other questions about this in the future though :) Thanks - - - Updated - - - I am trying to put all my components on a page and I come...
  2. R

    Missing schematic can anyone solve this? (hot air soldering station)

    Re: Missing schematic can anyone solve this? I looked the information over and didn't see that. Are you referring to the picture that shows the pcb and where the components go? If so then that doesn't tell me what connections there are. I am an electronics newbie is why I posted here to get...
  3. R

    Missing schematic can anyone solve this? (hot air soldering station)

    I would like to build a hot soldering station. I have found an instructible that I like, but no schematic was included, so it seems impossible. I have looked for other projects that do the same thing, but have had no luck. Is there someone here that could look this over and supply the missing...
  4. R

    Testing Amps on rewound microwave transformer

    OK great. I didn't know that about the DC measurement with this transformer. To stay on the safe side I will just plan on the DC being 1.5v lower than the AC. But I did plan on smoothing the output with capacitors. Any advice on which ones to use? Thanks
  5. R

    Testing Amps on rewound microwave transformer

    Yes, you explained most of that earlier. Did you read my latest post? Thanks
  6. R

    Testing Amps on rewound microwave transformer

    My Digital Multi Meter DMM (Extech 470 with True RMS) has settings for A/C power so when I measure A/C power it calculates the RMS and gives me the correct reading. When I measure D/C power I change the setting for that and so it gives the correct reading. I live in the US and we have 120vac...
  7. R

    Testing Amps on rewound microwave transformer

    Brian, Thank you very much for a very clear and understandable response. I've been basing my questions on the specs of the drop down power supply which states the input max is 40vdc and 8 amps. Sounds like you are saying that only the volts matter, and the amps will take care of themselves? I...
  8. R

    Testing Amps on rewound microwave transformer

    I didn't understand the graphic at all, and understood the rest a little bit. But I have pieced together things you said with other things I do understand and hopefully have a working plan. So I take a resistive load like a heating element or light bulb and measure it's resistance using my...
  9. R

    Testing Amps on rewound microwave transformer

    I don't completely understand this. Please explain with more detail. What about automotive fuses? What if I momentarily touch one to both wires? I would guess that if I leave it on too long then the current would burn it up just like it did my jumpers wires, but if only for a moment then not...
  10. R

    Testing Amps on rewound microwave transformer

    I need a max of 40v and 8a to power my drop down variable power supply. I have old microwave transformers so I removed the secondary and rewound it with 14 gauge wire. I now get 48vac and when I use a bridge rectifier it brings it down to 40vdc. I tried to test amps by hooking up my tester...

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