PICKINI V4 - an easy to build, self adjusting PI detector

[Arionas]

Look your photo...............






And Look My photo..

[ripsdevala]

All seems normal, coil is properly connected, pinpoin on off nothing change, yes pin5 opamp is 9v. Not shielding yet, should i?
I use standalone pickit3 programer, not set anything.

Update:
Change one 10uf caps pin4 16f2824 now 5v

[BC547]

2 differences in DC voltages are:
- pin 4 of the PIC = pinpoint pushbutton seems to be shorted - or switch closed : 0V instead of 5 V
- pin 5 of the opamp: not connected: 9.1V instead of 4.8V ??

Is the coil properly connected ? - check with ohmmeter between the 2 outer pins of the coil connector.
No short circuit with shielding? - check with ohmmeter between outer pins and middle pin

[ripsdevala]

This is what i got...
Sensitivity 0

U1 - PIC16F1824*
PIN 1 : 5.0V 5v
PIN 2 : 2.7V 2.7v
PIN 3 : 1.2V - sensitivity potmeter. 0.2v
PIN 4 : 5.0V. 0v
PIN 5 : 4.7V. 4.7v
PIN 6 : 0.1V. 0v
PIN 7 : 0.0V. 0v
PIN 8 : 3.7V. 3.6v
PIN 9 : 3.7V. 3.6v
PIN 10 : 2.7V 2.2v
PIN 11 : 0 ..5.0V - audio. 2.6v
PIN 12 : 2.8V. 2.8v
PIN 13 : 2.0V. 1.9v
PIN 14 : 0.0V. 0v

IC4 - LM318 opamp*
PIN 1 : 9.5V. 9.1v
PIN 2 : 6.8V. 5.3v
PIN 3 : 6.8V. 6.4
PIN 4 : 0.0V. 0v
PIN 5 : 4.8V. 9.1v
PIN 6 : 7.4V. 7.1v
PIN 7 : 11.9V. 11.5v
PIN 8 : 1.4V. 1.5v

[Arionas]

This is the coil error sound.
No flyback pulse is detected. There was a layout around here where pin 8 and 9 were not shorted.
Check all the DC voltages described here: http://users.telenet.be/willaert/MD/pickini/pickini_en/V4/electronics.html

[Arionas]

This is my Pcb.........Thanxs Mister F117

[Arionas]

This is the coil error sound.
No flyback pulse is detected. There was a layout around here where pin 8 and 9 were not shorted.
Check all the DC voltages described here: http://users.telenet.be/willaert/MD/pickini/pickini_en/V4/electronics.html

DC voltages


All voltages measured with a battery voltage of 12.0V:

• U1 - PIC16F1824
  PIN 1 : 5.0V
  PIN 2 : 2.7V
  PIN 3 : 1.2V - sensitivity potmeter
  PIN 4 : 5.0V
  PIN 5 : 4.7V
  PIN 6 : 0.1V
  PIN 7 : 0.0V
  PIN 8 : 3.7V
  PIN 9 : 3.7V
  PIN 10 : 2.7V
  PIN 11 : 0 ..5.0V - audio
  PIN 12 : 2.8V
  PIN 13 : 2.0V
  PIN 14 : 0.0V
  
  IC4 - LM318 opamp
  PIN 1 : 9.5V
  PIN 2 : 6.8V
  PIN 3 : 6.8V
  PIN 4 : 0.0V
  PIN 5 : 4.8V
  PIN 6 : 7.4V
  PIN 7 : 11.9V
  PIN 8 : 1.4V

[BC547]

This is the coil error sound.
No flyback pulse is detected. There was a layout around here where pin 8 and 9 were not shorted.
Check all the DC voltages described here: http://users.telenet.be/willaert/MD/pickini/pickini_en/V4/electronics.html

[ripsdevala]

340uh 2 ohm, no shield Just for test....
Error

https://dl.dropboxusercontent.com/s/apr8auhsup40lxg/%E7%9A%AEkpikini.mp3?dl=0

I do something wrong somewhere maybe .....

[BC547]

A coil that is simple to make is a 20 cm (8") diameter bundle coil -- 27 turns of isolated litze wire. This should be 300-350 microHenry.
Then a layer of electrical tape.
Then alu foil shielding all around except for a gap of 1 cm / 0.5" - do not short the shielding all around.
Then another layer of insulation tape to hold it all together.
Then you can pot it into some sort of shell. Like I described for Pickini V3 here:

http://users.telenet.be/willaert/MD/pickini/pickini_en/V3/coil.html

[ripsdevala]

All parts is ready, what is the best requirement coil?

[ripsdevala]

I think home telephone speaker not loud enough to use with, i use medium buzzer like this one

[nick holas]

Hi all
Hi bernard
Yes battery pack will be under thé arm cuff,touching thé opposite arm cuff,battery will be mounted on slidders so you can take it off to charge it
Thé lower stem will be carbone tube now i have to finish my coil!!!(hard thing to do for me!!!!!)
Thé round thing is effectively a speaker but not a piezzo ,it Côme from home telephone
Sending foto nearly

Ar

[BC547]

Nice work
Consider mounting the battery pack under the arm cuff as counter weight for the coil => better balance.
Avoid any metal at least 40 cm from the coil - consider a carbon fiber lower stem e.g. cheap fishing pole...
Using the arm cuff profiles opposite as detector stand is a nice touch

I assume the round thing on top of the PCB is a piezo buzzer ?

Best regards,
- Bernard

[nick holas]

not finished

Hi all
Hi Bernard
Hère s my not finished pikini rod ans enclosure .
As you can see i have to connect battery pack plug at the back side(near pinpoint switch plug)
In front side on\off switch,led,sens pot,ear jack.(ear phone volume set by pot allready incorporate on wire headphone)
Thé rod Weight is aprox 200-300 gr (rod only! Without battery pack , pikini box ans coil)
Tell me what you think about this (sorry for the color of rod pièces this was old 3d printer wire left) i can ,maybe ,do sôme improvement?? Give me sôme idea please.
Thank you all