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Martin Held

Ham radio, RF engineer, systems and PCB designer, and test engineer

Bend, OR
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martin-held
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This user joined on 07/25/2014.

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A 4-quadrant power supply built on a 1sqin PCB, +/-12V, 100mA, and floatable for multiple paralleling/series. 4layer, $10 OSHPark PCB.
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1 Square inch 4-quadrant floating power supply

martin-heldMartin Held

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A 47-LED xmas tree that can be used standalone or as an ornament
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Simple Christmas tree

martin-heldMartin Held

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Ground Penetrating Radar using Arduino
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GPRino

mirel-paunMirel Paun

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This is a scanning electron microscope I am building from scratch from mechanical, electronics and control software.
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My Custom Scanning Electron Microscope

vinis-labVini's Lab

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