May God bless you.thank you very very much.soon i will upload on my video on my negatif resistance touch on of switch using only single bd139.its shocking me that i have no idea of the phenomenon that with fast switching will latch the switch and mild switching ( gently push) will turn it off.i am researcher of negatif resistance effect since 15 years ago.but it will work on certain treshhold voltage.
Sir PCB inverter Bord main No.1 Anode + Hoti Hai Ja No.3 C + hoti hai. Main SMD ki jagah simple ZD Lgana hai. 2 side wala... Waha lgana hai jaha mosfet hote hai. Please help me thanks.
Thank you so much Sir. Your idea was of great great help for me. I was struggling with an equipment. This made it so easy for me. Good luck Sir and keep posting such wonderful videos.
hi, it's very easy method you have shown to understand the concept easily and which helps alot for us.. thank you so much.. and I have 1 question if it's IN4148 zener ,then how can we identify.. by using this method..? pls reply
Excellence outlines and easy to followed. Good instructional video and construction skills and the dedication of sharing the knowledge. Thank you and God Blessed. Chau Nguyen DDS
@@LuxmanPD272 I think I used 2K. A wider range (at least 1-3K range) will work. I used my bench power supply to see how much current was drawn (something like 20-30 milliamps) while testing a wide range of zener diodes, to arrive at 2K, because too much current can damage zenors. I am using a 30v supply, so I have to be aware that if I am testing a higher voltage zener, I won't be able to determine if it is faulty, if the voltage is lower than the breakdown voltage which causes a zener to conduct in the opposite direction.
If i want to use a zener diode as a voltage regulator then do i need to connect 10k resistor at the positive terminal as you have used in your circuit.
This setup does NOT work for Testing the small SMD Zener Diodes!!! The 10k Resistor burns down and the voltage is unreadable...! Is there any solutions?
+Yashod Raj It does not depends on voltage. It depends on wattage of the zener diode which I have explained at the end of the video. If the multiplication of voltage across diode and current through it is greater than the wattage of the diode then it will burn.
I want to retrofit some lights in my car and the rear lights have a constant 3v and when brake is applied the same is increased to 12v and when i use relay it constantly beeps clicks due to 3v is there a way to cancel that 3v and make it to work only when there is 12v in the curcuit. Please
