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.