This circuit is an op-amp comparator with three inputs, to compare 3 different voltages and show the higher one by using an LED.
Parts list:
IC CD4001
IC LM324
Resistor 510 ohm (3pcs)
RED LED
GREEN LED
BLUE LED
IC socket 14 pin(2pcs)
Capacitor 220uF
Capacitor 100nF
Circuit:
VCC could be any voltage between 4 to 15V
Video:
This circuit is an Automatic Transfer Switch ATS / Changeover with 3 Input Sources (3 ways).
It has 3 seconds time delay to transfer between Grid and Solar system (No delay time for Generator).
Maximum current up to 20 Amps.
Works with both 110V and 220V systems.
Parts list:
IC LM358
IC Socket 8dip
Power supply HI-LINK 12V 3W 250mA
Resistor 51K (2pcs)
Resistor 3K (2pcs)
Resistor 1K (2pcs)
Resistor 10K (4pcs)
Resistor 560
Resistor 3.9K
Capacitor 100uF 16V
Optocoupler PC817
RED LED
BLUE LED
Screw Terminal
Relay 12V 20A (4pcs)
Bridge diode DB107 (2pcs)
Diode 1N4007 (3pcs)
Transistor 2N2222 (2pcs)
Circuit:
You can order this PCB from PCBWay.com:
Video:
This is a DIY Three Phase Sequence Indicator / Rotation Tester
Parts list:
IC LM324
IC E50D
Resistor 330K (3pcs)
Resistor 330 ohm (8pcs)
Resistor 10K (6pcs)
Resistor 10M (3pcs)
Diode 1N4007(3pcs)
Diode SS14
Inductor 47uH
White LED (2pcs)
Red LED
Yellow LED
Green LED
Capacitor 100nF
Capacitor 100uF 10V
ON/OFF Switch
Stepper motor 5V (28BYJ-48)
Transistor S9014 (3pcs)
Battery 3.7V (18650)
Battery charger module for 18650 battery
IC Socket 14 pin
Circuit:
You can order the PCB from PCBWay here:
3D printed part:
https://www.tinkercad.com/things/8NgFQe2ENGs-3phase-rotation-tester-
Video:
This is a modification to convert an LED LCD TV to Full Array Local Dimming Backlight.
Parts list:
1W COB LED (98pcs)
LDR (98pcs)
MOSFET SI2300 or SI2306 (98pcs)
Resistor 4.7K (98pcs)
Resistor 1ohm (98pcs)
Circuit:
Repeat the same circuit 98 times
You can order the PCB from PCBWay.com here:
https://www.pcbway.com/project/shareproject/Full_Array_Local_Dimming_TV_Backlight_6013e5cc.html
3D Printed Parts:
https://www.tinkercad.com/things/9z6gjJJRLsc-local-dimming-tv-backlight-part-12
https://www.tinkercad.com/things/eBGjOFxDnML-local-dimming-tc-backlight-part-22
Video:
This is a simple 220V Lamp flasher circuit.
Parts list:
Triac BT136
Diac DB3
Diode 1N4007
Capacitor 47uF 50V
Resistor 100K 2W
Resistor 1.5K
Circuit:
Video:
Constant Current LED Driver With Single IC RM9003 (6V to 600V)
English datasheet: https://iranmls.com/wp-content/uploads/2021/10/RM9003A-Datasheet.pdf
This circuit is an Automatic Dark switch or photocell using a solar panel.
It can switch ON the light bulb at night and turns it OFF at day time automatically.
You have to connect it across the garden switch.
NOTE: The solar panel here used just to activate the relay, not to produce the high voltage for the light bulb, you need an external 110/220V source (grid power).
Parts list:
Solar panel 6V 1.1W
Relay 5V
Diode 1N4007
Circuit:
Video:
