Dilution Refrigerator_signal RC filter PCB on the cold finger

Design

Modeling & Fitting

order PCB

solder

Low Temperature Measurement Experimental determination

Voltage controlled current sink (0 to 500 mA)

If you want to change current limitation, you should change 5 ohm 10 watt resistor part to another resistor. And make OP-Amp offset part. (ex. OP07 : 1, 8 pins)

I used D560 npn transistor.

 Voltagemeter, currentmeter, timer, SMPS, Voltage controlled current source and vaccum on off switch.

+ UV lamp

Handmade spin coater repair

I changed spin coater timer part(top left).

Misumi FA catalog

I want to make a mask aligner.

The Art of Electronics 3rd Edition

I just bought: 'The Art of Electronics' by Paul Horowitz et al. via @amazon http://www.amazon.com/dp/0521809266/ref=cm_sw_r_tw_asp_CUm8J.03HJXZ5 …

E-beam Gate test

GaAs / AlGaAs Sample

MESA Layer : 450 Å

E-beam Gate : PdAu 150 Å + Au 150 Å

made by Changki

photo by Hyungkook