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Post by dan1973 on May 2, 2014 7:52:29 GMT -8
Garry, you asked for iddeas for interesting projects. Here are some:
1. "pinpointing" detector which can detect wires, metal pipes in walls, and plastic pipes which are filled with water. Eventually with center of surveyed object detection, and indicator if the wire has live power inside it.
People around me regularly drill holes in walls exactly where they shouldn't, resulting in dire or hilarious situations.
2. Laser telemeter - analogue part
3. 20-130A Arc welder with current slope control, voltage control and thermal shutdown. Powered from single phase 120V 60Hz / 220V 50Hz. Modular design in such a way that later this can be enhanced to MIG/TIG processes.
4. Single phase powered SMPS anodizing station for small surfaces. ~40 Amps with current control and Voltage control up to 120V.
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Post by Gary Lecomte on May 3, 2014 5:13:32 GMT -8
1. "pinpointing" detector which can detect wires, metal pipes in walls, and plastic pipes which are filled with water. Eventually with center of surveyed object detection, and indicator if the wire has live power inside it.
a) Detecting LIVE Wires in Walls May be possible with my Electric Fence Detector. But ONLY if the wires are actually Drawing Current. Detecting a Live wire that has No Current Flow would be VERY DIFFICULT to do.
b) Metal Pipes, Use a Metal Detector.
c) Plastic Pipes even filled with water is very difficult.
People around me regularly drill holes in walls exactly where they shouldn't, resulting in dire or hilarious situations.
2. Laser telemeter - analogue part
**** NOT Sure What this is or what it does?
3. 20-130A Arc welder with current slope control, voltage control and thermal shutdown. Powered from single phase 120V 60Hz / 220V 50Hz. Modular design in such a way that later this can be enhanced to MIG/TIG processes.
**** Not something I would consider & Not in my field of Expertise.
4. Single phase powered SMPS anodizing station for small surfaces. ~40 Amps with current control and Voltage control up to 120V.
**** Also Not something I would consider. 40 Amps, up to 120 volts, Exceeds normal house wattage of 1500 watts. (That would be 4800 watts on a 110 VAC line in Canada.)
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Post by dan1973 on May 4, 2014 6:48:50 GMT -8
2. Laser telemeter - analogue part laser diode measurement of distance.
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Post by Gary Lecomte on May 4, 2014 9:48:09 GMT -8
2. Laser telemeter - analogue part laser diode measurement of distance. That would be Quite Difficult in Analogue.
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Post by lamazoid on May 4, 2014 10:39:01 GMT -8
most of "laser distance meters" are actually ultrasonic principle, laser is only for pointing
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Post by Gary Lecomte on May 4, 2014 18:26:15 GMT -8
most of "laser distance meters" are actually ultrasonic principle, laser is only for pointing Ultrasonics was also my thought. But I wasn't sure if a Laser device also existed.
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Post by Jay on Aug 20, 2014 13:07:04 GMT -8
Hi Gary, Wonder if you might design a low inductance meter or perhaps a very sensitive LC meter? I love your low Resistance meter. I built both and they work great. I am trying to measure the inductance and capacitance of cables and Zip wire.
p.s. have a great vacation
Thanks Jay
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Post by Gary Lecomte on Aug 20, 2014 15:03:48 GMT -8
Hi Gary, Wonder if you might design a low inductance meter or perhaps a very sensitive LC meter? I love your low Resistance meter. I built both and they work great. I am trying to measure the inductance and capacitance of cables and Zip wire. p.s. have a great vacation Thanks Jay Hi Jay, Not so easy to do. Your far better off to just buy one of the Cheaper Chinese LC Meters. I mostly use a B&K Precision Model 878 LCR Meter which is NOT Cheap, but I have heard some of the chinese ones are fairly cheap and also work pretty good. This one only measures down to 30pF, but has some Good Write-up about it www.banggood.com/DIY-Meter-T...ntent=vera&emst=2NKh40Be80_237878_1013964_129Even though it Says a Minimum of 30pF,First Measure a 50 pF cap, than Parallel it to your wires. Now Subtract the Measured value and the Resulting difference should be the wires Capacitance. Gary
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Post by Jay on Aug 24, 2014 6:52:50 GMT -8
Hi Gary, Thanks for your reply. I used a signal generator and oscilliscope using the method where you wire a known resistor (measured with your design) in series with the wire and monitor the voltage until an equal voltage is registered through the wire and through the resistor by adjusting the frequency. It just seemed that there must be an easier and more accurate way as my scope is not digital so it involves some eye estimation; I wanted a little more accuracy, if possible. What do you think of this circuit: homemadecircuitsandschematics.blogspot.com/2013/09/homemade-inductance-meter-circuit.html?BTW, the link that you referenced above is not working for me. Again, I appreciate your help, Jay
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Post by Gary Lecomte on Aug 24, 2014 10:46:02 GMT -8
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Post by Jay on Aug 25, 2014 10:12:31 GMT -8
Thanks. Have a great vacation. Jay
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