# Martin H

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bio website location Manchester, United Kingdom age 32 member for 1 year, 6 months seen Dec 3 at 23:27 profile views 3

I am a LaTeX user for several years now but I never took it much further than user level. Sometimes I wish I'd be a better coder but I am able to solve most of my problems with existing packages.

Currently I am in the last year of my PhD in Chemical Engineering in Manchester, England which means that I won't be able to dedicate much time to tex.stackexchange in the next couple of month. However, I am going through phases of substantial procrastination and if I see a question I can answer, I'll try to give a good answer.

Once finished with my PhD, I'd like to return to my home sweet home in Germany.

# 35 Actions

 Sep3 awarded Popular Question Apr25 awarded Teacher Apr25 revised Arduino motor shield running 2 12V 60 RPM DC motor added 48 characters in body Apr25 comment Solar power wattage requirement Got the same number, simple multiplication :) Which charger uses 4.7Amps? Serious current. My oldschool Nokia takes a max of 890mA, but I guess with modern power hungry devices this is a reasonable value Apr25 answered Arduino motor shield running 2 12V 60 RPM DC motor Apr25 awarded Popular Question Apr19 comment Capacitive Touchscreen for DIY usage? Those are resistive 4-wire touch screens. Now, early 2013, you can get them for about 3€/2.50GBP on ebay Apr5 revised Constant current circuit with transistors/MOSFETs design comparison added 1263 characters in body Mar1 accepted Constant current circuit with transistors/MOSFETs design comparison Mar1 accepted Measure current in high voltage (10kV) Feb22 comment Measure current in high voltage (10kV) @Jason from 10,000-20,000 Hz according to my Plasma guy Feb22 comment Measure current in high voltage (10kV) Ah ok, so this is basically reversing the ring that I am using now. Currently it is just like in the picture where the red cable is going through the ring and the winding gives me 0.1V per Amp. Feb22 comment Measure current in high voltage (10kV) sorry forgot to mention it. It is AC, I've edited it. We expect something in the ~10mA range peak to peak Feb22 revised Measure current in high voltage (10kV) added 3 characters in body Feb22 awarded Commentator Feb22 comment Measure current in high voltage (10kV) A good idea but sadly this ring thing is only big enough for the cable to go through once (approx 1.5cm diameter). It is an super old device I have to add (people hwo read PhD comics will know: doing cutting edge research with equipment from the mid 80s rocks). Feb22 asked Measure current in high voltage (10kV) Feb9 awarded Scholar Feb9 accepted Powering a 12V and a 9V device from single power supply with LM7809 voltage regulator Jan21 comment Constant current circuit with transistors/MOSFETs design comparison I have taken the 100K resistor value from the first link that I posted. The Arduino pin is 5V and 20mA max., I think. The TIP110 NPN Darlington used in the second circuit has a current gain of 2500. Does this mean my supplied current needs to be 350mA/2500=0.14mA? This would give me a resistor value of (5-0.7)V/0.14mA~ 30k Ohm. Does this sound more reasonable?