This is a Tester for LED and Zener diode with voltage range from 0 to 200V DC.
Parts list:
IC NE555
IC LR8
MOSFET 20M60
Diode UF5407
Resistor 360 ohm (2pcs)
Resistor 10K
Resistor 100 ohm
Resistor R (See the note below)
Capacitor 10uF 400V
Capacitor 100nF
Banana socket (2pcs)
Slide Switch 3pins
Inductor 2mH
IC Socket 8dip
LED 200V Voltmeter
3.7V Lithium ion battery 18650
Boost converter XL 6009
Battery charger TC4056
Test probe
Circuit:
For 5mA, R=240 ohm
For 10mA, R=120 ohm
For 20mA, R=60 ohm
For 30mA, R=40 ohm
Download the Gerber file from here:
https://drive.google.com/file/d/13TtutdUs6ivaiBSolfEa6gKczDxz4e5V/view?usp=drive_link
Watch this video for more details: