Pistol Detector - TOTeM (Complete Details)

[ERDOGAN37]

https://www.youtube.com/watch?v=M9clY_P5HlQ

[ERDOGAN37]

https://youtu.be/4yy0H9s2SaE?si=xfFpb_9X0B3BDMpY

[engkhaled]

In the mean pcb we ar found 3 transistor bc107 but your pcb 2 transistor bc107 why

[engkhaled]

In the mean pcb we ar found 3 transistor 2522a36a80fb9dc4&sca_upvtransistor bc107 why

[engkhaled]

Originally Posted by aft_72005

Hi Omar
please upload PCB sprint file .

Originally Posted by omar

I have improved the drawing a little and got rid of the connections. You may need to shield the sensing stage. It appears that the transmitting coil and the receiving coil are capacitively coupled to operate at one frequency, and thus this process increases the sensitivity to the resonant frequency. You may need to raise the value of the variable resistance to facilitate the adjustment process. Anyway, as you know, nothing is guaranteed in this field .

In the mean pcb we ar found 3 transistor 2522a36a80fb9dc4&sca_upvtransistor bc107 why

[engkhaled]

Originally Posted by omar

I have improved the drawing a little and got rid of the connections. You may need to shield the sensing stage. It appears that the transmitting coil and the receiving coil are capacitively coupled to operate at one frequency, and thus this process increases the sensitivity to the resonant frequency. You may need to raise the value of the variable resistance to facilitate the adjustment process. Anyway, as you know, nothing is guaranteed in this field .

In the mean pcb we ar found 3 transistor 2522a36a80fb9dc4&sca_upvtransistor bc107 why

[Qiaozhi]

BC108 or BC107 ... it doesn't matter.
Any general purpose NPN transistor will work.
You could also use a 2N3904.