Hi, i dont understand your LED tester. Tester means check working or not ... you only need the resistor, your PSU and 2 wires for this to check LED. What is the usage of the V-meter?
@@mstfproje Degree of wear, tolerance within production, different LED type, contact resistance of test probes... There are so many possible reasons for changes in volts. That's also a high-precision voltmeter :-) Instead of this flying setup, it's better to use a transistor tester for $10 or $15. In addition to the diode test, many other components can be tested.
🌹🌹👌
Hi, i dont understand your LED tester. Tester means check working or not ... you only need the resistor, your PSU and 2 wires for this to check LED. What is the usage of the V-meter?
so you can see throw the v meter how much volt that led uses
@@FardinAmiriSF the voltage is not interesting. For LED the current is important.
voltmeter shows the voltage falling on the led, the voltage difference between the same type leds shows the degree of wear.
@@mstfproje Degree of wear, tolerance within production, different LED type, contact resistance of test probes... There are so many possible reasons for changes in volts. That's also a high-precision voltmeter :-) Instead of this flying setup, it's better to use a transistor tester for $10 or $15. In addition to the diode test, many other components can be tested.
How many input voltage ?
Minimum maximum input voltage for your schematic ?
Looks like 27.5 volts input on the video
@@entertainmentdudes noted with many thanx
I have 27.5 V dc, you can use the dc voltage you have
@@mstfproje thanks for the reply, can i use 12v for the same circuit ? Or do i have to change anything ?
@@reshairo it will probably work
With green leads ? Is It a Power supply?
green-headed black cable - , green-headed red cable + DC
Metre is a measurement and meter is a device.
What exactly did you want to say
@@mstfproje Look at the title of your video.
Why choose a 2.2 kOhm resistor ?
for current limit ~14 mA
Ampere kese maloom karain
I did not understand
Volt meter nya harus 3 kabel ya?
kabel merah adalah kabel listrik voltmeter, tidak perlu 3 kawat
@@mstfprojemaksud sy klo pakai volt meter yg 2 kabel apakah bisa? Thank you