Surf PI Pro

[ZOUjiarui]

I should be able to find the problem.

[ZOUjiarui]

Can anyone give me a picture of a working surf pi pro circuit, the distance of the coin should be at least 15cm, thank you very much

[ZOUjiarui]

Thanks. I threw it away. I think I should make a new one.

[ionut_mtb]

i never used surfxx schematic/board. you can try modify into this schematic, first change C17, R3, R4, R5 (from your board). do you have oscilloscope? your problem might be at delay. picture of the coil please.

[ZOUjiarui]

It's always been a short distance, I can't fix it, I can't find its schematic, the existing drawings don't match it.

[ZOUjiarui]

I'm starting to not believe it, I can't find any schematics of it, I made the circuit voltage all right, I adjusted its damping resistor and it seems to work only once, or nothing, it's just too short a distance

[ZOUjiarui]

Can anyone tell me that there is nothing wrong with this circuit layout?

[kt315]

upload pictures here will not be easy.
---
that was done against the spammers. use long way, via go advanced.
do the pics on sunny day under the sun. your pics are blur be cause very poor light.

[ZOUjiarui]

Fortunately, after I adjust the damping resistor actually work properly, do not know why, upload pictures here will not be easy.

[surfdetector]

Sorry, the translation is not good.

tl555 Replace with lm35
NE5534 Pin 6 does not adjust to 0V

Post a picture of your PCB

[ZOUjiarui]

Sorry, the translation is not good.

tl555 Replace with lm35
NE5534 Pin 6 does not adjust to 0V

[ZOUjiarui]

Masters, my surf pi pro can only detect five centimeters
I used a regular horn.
The tlc555 was replaced by the lm555 with a voltage of 0. 4V
The voltage on pin 6 of ne5534 can only be adjusted to about 4V, and it will only rise.
All other voltages are normal.
Please help me, masters.
Thank you very much.

[Bayu]

Thanks master

[Tibuck19]

hello all masters, I'm working on surf but I can't detect it, the frequency is 600 hz, the timing signal is out, but it can't be detected, and also if there is a voltage benchmark coming out of the ne5534 and lm 358 how many volts please help

http://www.adrianandgenese.com/blogger/2012/07/13/how-to-build-a-surf-pi-1-2-pulse-induction-metal-detector-from-a-diy-kit/

https://www.youtube.com/watch?v=EX3SffXmtaQ

[Bayu]

hello all masters, I'm working on surf but I can't detect it, the frequency is 600 hz, the timing signal is out, but it can't be detected, and also if there is a voltage benchmark coming out of the ne5534 and lm 358 how many volts please help