Whites Surf PI schematic

[daverave]

im making the surf pi detector...im just going to make the coil...im using 30 SWG wire and the coil size is 15" x 12" how many turns approx would i need for this coil ??????

[Falcon]

The white and red wires are to test potentiometer to find the best value of the damping resistor. But nothing changed. Now is a resistor of 390 Ohms. but still the same (2cm)

[Falcon]

Q6 - BC517 end now C2 - 1000uf - 25V

[liekwang]

paku

Look here http://www.adrianandgenese.com/blogg...rom-a-diy-kit/

[liekwang]

to paku

?The Diameter of the coil do not wear 19cm 20 comrades plated resin wear wire-coated wire such as a catapult or Slingers layered lots in its like cable housings

[Geo]

Sorry for the delay
My motorcycle battery is 12V - 5 amp
My 20cm coil, 18 turns, 0.5 mm wire (24AWG) or 20cm, 18voltas wire 0.6 (23AWG) or 23.5 cm, 24 turns, 0.5 wire (24AWG). all with the same results.
5 ICL7660 pin voltage is equal to - 4.75V, and pin 8 is 5.1v +.
In NE555 pin 3 of the voltage is 11V (+ or -).
In 2N3906 between the collector and GND is "4.4V".
Adjusted the offset -> 0V on pin 6 of the NE5534 (as described in the forum) and remains so.
The tension in my coil is 0.56 V.
Do not know if it needs some more adjustment / setting / trick / secret, or some substitution of values, so I am sending a picture of how this my Surf Master at this time (with the updated values).[ATTACH]26266[/ATTACH][ATTACH]26267[/ATTACH]

What are the red and white wires beside the IRF9640????
Check the dumper resistor. If it is a big one then the detecting distance is only 2 cm.

[6666]

What transistor have you got for Q6 ?

[Falcon]

Sorry for the delay
My motorcycle battery is 12V - 5 amp
My 20cm coil, 18 turns, 0.5 mm wire (24AWG) or 20cm, 18voltas wire 0.6 (23AWG) or 23.5 cm, 24 turns, 0.5 wire (24AWG). all with the same results.
5 ICL7660 pin voltage is equal to - 4.75V, and pin 8 is 5.1v +.
In NE555 pin 3 of the voltage is 11V (+ or -).
In 2N3906 between the collector and GND is "4.4V".
Adjusted the offset -> 0V on pin 6 of the NE5534 (as described in the forum) and remains so.
The tension in my coil is 0.56 V.
Do not know if it needs some more adjustment / setting / trick / secret, or some substitution of values, so I am sending a picture of how this my Surf Master at this time (with the updated values).

[Qiaozhi]

Bro u ada bikin surf PI ni kan u punya jadi tak i bikin surf PI ni long board tak jadi apa pun
Coil size dia yang betul apa yeak

Please write in English.

[paku]

paku just 2cm?. ish ish

Bro u ada bikin surf PI ni kan u punya jadi tak i bikin surf PI ni long board tak jadi apa pun
Coil size dia yang betul apa yeak

[pnp007]

ok i will check it

paku just 2cm?. ish ish

[6666]

Hi Falcon
interesting that you both have the same fault,
But may not be the same cause.
I guess you have checked the basics first, a good 12v battery, all the voltages around the circuit are correct, inspect pcb for faulty solder joints , short circuits etc,give the back of the pcb a gentle clean with brush and denatured alcohol and remove all flux,
a properly made coil, check dc off set, what type of 4066 did you use,
do the delay, threshold and volume controls all work, is the peizo buzzer connected the correct way.

[paku]

Paku found it for you, check R18 and R22

ok i will check it

[Falcon]

Hi, 6666.
I have the same problem as the Paku (detects only 2cm), already checked the resistors (R18 and R22) and are OK.
What could be the problem now?

[6666]

Paku found it for you, check R18 and R22