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.
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).
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
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.
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.
Very good method to teach. Any one can learn it.
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?
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.
Nice job
Thank easily smjhany k liye 😊
Great video. Thanks for sharing your knowledge.
amazing stuff!!
Thinking of building, do these require current flow in wire being tested?
wow ...amazing en educative
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.
Thanks for sharing?
Can i replace bc547 with 2n2222? Thank you!
Very good videos .Yeh Saman kis dukan par mil Sakta hai.
Gracias por su aportación..
Nice video my friend
What is its range of detecting? Till what distance it will detect the voltage?
Maestro buen material. Belleza pero muestre uno qué detecte miliampers....
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).
good job sir
Thank you :D
Con que voltaje se alimentó el circuito.
Drawing shows 220k resister at the LED. Package says 220Ω. Which is correct?
its 220R that means 220Ω :)
11kv line ko chek krne ke liye ise use kr skte he
eu trabalho com eletricidade aqui em BH
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
What is powering your detector?
+Dave Killam 9V battery but i used a 9v power supply :)
3 volt queen battery
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
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
Please provide a circuit diagram for 20 LED on 230 volt AC supply
eu gosto muito de fazer aparelho
Why connect 3 transistor and 3 resistor in ckt
Thanks
How much should be the wattage of the resistor?
1/4 W
इनके बारे में बोलकर वीडियो डालिए गा आप हमको अच्छा लगेगा
What is battery voltage?
9v :)
3 volt queen battery
DC or AC ? test
AC 220- 230 V
यह सब सामान इंडिया में कहां कहां उपलब्ध है
Circuit is perfect but not working
Firoz Deshmukh it works
May be not correctly installed transistors
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.
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.
Lol
Gungaa hya kya
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