Thank you. This worked for me. I used h945 transistors because I salvaged them off an old computer mouse. One note... try to keep leads as short as possible. This design may not be perfect but it sure beats the cheap Chinese line tester I bought.
Oh come on now, this is a perfect video on how not to solder! I have seen this circuit many times advertised as a ghost detector, a darlington transistor array with antenna sensor.
Hi. I made this with bc547, but led is always on. But, when I touch negative or positive terminal, led just turn off, and all circuit start working OK. When detect a phase, led start to lighting...
Hello Friend. Is there any scheme to emulate the sound of a rc model motor with a small speaker connected to the output of the receiver to the esc? Something that mimics sound like a motor glow? It serves as It serves as a suggestion for you.
My circuit is working but I think it is fack because when I touch the antina led glow and it work just like a transister switch so when we touch entina near to wire it work as touch switch it not detect a phase wire ,,,,,, if you know I am right then give me a answer
you cannot use the system above to detect dc voltage. dc voltage creates a continuous current in one direction. Without alternating the direction of the current the magnetic field will not change and the result is no voltage at the detector antenna (or inductor if you will).
its not stronger, its just different topology, the pen tester is capacitive circuit and your (rather poor) assembly is inductive circuit, very different. Also the circuit you show has notoriously poor sensitivity.
Sorry but this is missing the point. The key is to design a tester with a specific THRESHOLD that is stable against battery voltage, temperature, mains frequency, etc. And if you build 100,000 they all work the same.
Very good method to teach. Any one can learn it.
Thank you. This worked for me. I used h945 transistors because I salvaged them off an old computer mouse. One note... try to keep leads as short as possible. This design may not be perfect but it sure beats the cheap Chinese line tester I bought.
Great video.
If you added additional led’s at the other two resistors, would the three led’s act as a make shift signal strength meter?
11kv line ko chek krne ke liye ise use kr skte he
Thanks for sharing?
Can i replace bc547 with 2n2222? Thank you!
Oh come on now, this is a perfect video on how not to solder! I have seen this circuit many times advertised as a ghost detector, a darlington transistor array with antenna sensor.
Con que voltaje se alimentó el circuito.
Very good videos .Yeh Saman kis dukan par mil Sakta hai.
What is its range of detecting? Till what distance it will detect the voltage?
Nice job
Thank easily smjhany k liye 😊
Hi. I made this with bc547, but led is always on. But, when I touch negative or positive terminal, led just turn off, and all circuit start working OK. When detect a phase, led start to lighting...
Thinking of building, do these require current flow in wire being tested?
Hello Friend. Is there any scheme to emulate the sound of a rc model motor with a small speaker connected to the output of the receiver to the esc? Something that mimics sound like a motor glow? It serves as It serves as a suggestion for you.
Maestro buen material. Belleza pero muestre uno qué detecte miliampers....
इनके बारे में बोलकर वीडियो डालिए गा आप हमको अच्छा लगेगा
How much should be the wattage of the resistor?
1/4 W
My circuit is working but I think it is fack because when I touch the antina led glow and it work just like a transister switch so when we touch entina near to wire it work as touch switch it not detect a phase wire ,,,,,, if you know I am right then give me a answer
Nice video my friend
Please provide a circuit diagram for 20 LED on 230 volt AC supply
Why connect 3 transistor and 3 resistor in ckt
Drawing shows 220k resister at the LED. Package says 220Ω. Which is correct?
its 220R that means 220Ω :)
इस वीडियो में एक कमी है
अर्थ में भी ledजल जाती है
जबकि वहां पर फेस होता भी नहीं है
और हम डरकर हाथ नहीं लगाते
ऐसा यंत्र बनाई रियल फेस को शो करे
I make as per ur guide line but led can glow continue???? Please advise me what a region and how can I solve that problem
I think you should replace transistors
What is powering your detector?
+Dave Killam 9V battery but i used a 9v power supply :)
3 volt queen battery
Your video is great but I will detect micro voltage Dc (0,5v) how can I adapt your system?
you cannot use the system above to detect dc voltage. dc voltage creates a continuous current in one direction. Without alternating the direction of the current the magnetic field will not change and the result is no voltage at the detector antenna (or inductor if you will).
What is battery voltage?
9v :)
3 volt queen battery
Great video. Thanks for sharing your knowledge.
DC or AC ? test
AC 220- 230 V
good job sir
Thank you :D
यह सब सामान इंडिया में कहां कहां उपलब्ध है
wow ...amazing en educative
its not stronger, its just different topology, the pen tester is capacitive circuit and your (rather poor) assembly is inductive circuit, very different. Also the circuit you show has notoriously poor sensitivity.
amazing stuff!!
Gracias por su aportación..
Sorry but this is missing the point. The key is to design a tester with a specific THRESHOLD that is stable against battery voltage, temperature, mains frequency, etc. And if you build 100,000 they all work the same.
eu trabalho com eletricidade aqui em BH
Circuit is perfect but not working
Firoz Deshmukh it works
May be not correctly installed transistors
eu gosto muito de fazer aparelho
Thanks
not working....always led glowing...useless
+LAXMAN yadav no it works perfectly :)
It must be in a plastic insulated box otherwise your hand will act as an antenna and cause the device to detect radio signals.
Ha ha ha... Your soldering skill like me ,it's need to be refined.
Not working
+alok singh ir worked for me :)
IsDeno24 not working I am using bc548 transistor
the type of transistor does not make any difference. Check your circuit wiring for mistakes...
alok singh use Bc547 transistor
But it's not matter.
But first you should try it
Fine Arts Paintings & Electronics i try but not working. Bc547
Gungaa hya kya
Lol