felezjoo PI(the best pulse induction metal detector that I made until now)

[6666]

Did you test the 1602 before you connected it ?

oh hang on did you say that you connected 12 volts to it

[chuubaba]

TODAY I ATTACHED 16x2 LCD TO felezjoo PCB BUT IT DID NOT TURN ON. GIVING IT 12V DC FROM POWER SUPPLY, NO COMPONENTS HEATING UP OR ANYTHING. GURUS HELP ME SORT WHAT'S WRONG WITH IT. I HAVE MULTIMETER AND OSCILLOSCOPE TO TEST.

[glowian]

Pulse Width is playing very important role in calculating debug numbers.
Initially PW was set at 150.
Than i checked the debug numbers by rising PW up to 220 and on each step i got better debug numbers and much calmer and more stable behavior.
When PW is set at 180 and above; detector behaves perfectly! Just splendid!
But be aware that this is the situation closely related to coil specs too.
If you get different behavior than it's probably due differences in coils.

[useus]

I'm going crazy ...

by recapitulating

349uH coil 1.1 ohm
15R in series of the coil
the A B C values are now A 300 B 756 C833
autodelay 19

A value are perfect
B and C values how do I perfect them?


please help me! thanks

[gandolfi]

i found two PCB layout.
- what do you think to do Gerber file ?
- Are they functionnal ?

Walkman felezjoo PI
FELEZJOO PI.pdf
Lay6

Original in lay6
Felezjoo.zip

thanks

[useus]

i replaced 357 with a new one, now A B C values are 410 853 857 with a 1M resistor. I think this 357 is original however the values are high.

to lower the values, mount a resistance in series to the coil?

[useus]

I could have managed to increase the counter but I would need a person to test 2 variants, if interested send me a pm.

[gandolfi]

hi,

anyone have gerber, layer6 or eagle file of pcb ?

thanks

[eclipse]

Not a chance. The original author is not a member of this forum but if you open his forum you will see there's no source code provided as well.

[jlsilicon]

Any possibility of seeing the Atmega328 Source Code ?

[BillBert]

Where is the best place/price to purchase one of these (kits)?

[useus]

5x battery holder I have not unfortunately found
lipo is a solution but you need to find a suitable battery charger

[gandolfi]

5x single 18650 case in series I do not know if it is possible to load them with an 18v battery charger, it is convenient to charge them individually

- if i charge individually, where i can find a case for 5x18650 ?
- or i take lipo battery https://fr.aliexpress.com/item/MOS-5...732093016.html

[useus]

5x single 18650 case in series I do not know if it is possible to load them with an 18v battery charger, it is convenient to charge them individually

[gandolfi]

for the 5x18650. Do you know :
- Where i can find an hold case or a system to attach them ?
- How i can recharge them if there are in the detector box or in a a case or heat-shrinkable plastic