Arduino Nano PI Main Discussion

[Qiaozhi]

The tile has already arrived (nicely done), the book has not yet. Such a question: is the BOK list only in the book, have I not noticed it in the forum, or just read the values from the scheme?

The Component Parts List is in Appendix A of the book.

[dingbatca]

Here is my BOM. I have not built up my Nano Pi yet, as all the parts are in the mail, so I can not vouch for the accuracy of my list. Please take it with a grain of salt.

Item	Name	Quantity	Tayda #
Arduino Nano	U1	1
ICL7660	U2	1	A-1051
NE5534	U3	1	A-250
CD4066	U4	1	A-555
LM358	U5	1	A-045
IRF9640	Q1	1	A-084
2N3904	Q2	1	A-111
2N3906	Q3, Q4, Q6	3	A-117
MPSA13	Q5	1	A-432
1N4148	D1, D2, D3	3	A-157
10K	R1, R5, R10, R11, R13-17	9	A-2203
Rd	R2	1
3R3 (2W)	R3	1
1K	R4, R6, R7, R21, R22, R28	6	A-2200
1M	R8	1	A-2277
22K	R9 R18, R27	3	A-2284
100k preset	R12	1	A-587
100K	R19, R26	2	A-2248
150R	R20	1	A-2199
220K	R23-R25	3	A-2329
47K	R29	1	A-2279
1000uF (Electro)	C1	1	A-4523
220uF (Electro)	C2, C3, C9	3	A-1159
100nF	C4, 5, 7 ,8 ,12 ,13 ,15	7	A-951
470nF	C6, C10-11, C14	4	A-568
10K pot	Sample delay, threshold	2	A-4879
1K pot	Volume	1	A-3556
Boost switch - On/Off		2	A-4567
2-pin screw term		4	A-1189
3-pin screw term		3	A-1190
high-impedance speaker
2-8 socket		3	A-001
2-14 socket		1	A-004
3X 18650 case		1	A-5393

[surfdetector]

Here is my BOM. I have not built up my Nano Pi yet, as all the parts are in the mail, so I can not vouch for the accuracy of my list. Please take it with a grain of salt.

For those interested in getting everything from Tayda, here is the Tayda part number for a Nano: A-2864

[MartinB]

Got my Arduino PI up and running today Just need to finish off the audio section.
Tried it on a Henry VIII silver penny and got a strong signal at 10 inches. For those of you who are not familiar with old English coinage, this particular coin is 14.5mm diameter and 0.65mm thick.
Thanks for a great project George

[lc516]

Got my Arduino PI up and running today Just need to finish off the audio section.
Tried it on a Henry VIII silver penny and got a strong signal at 10 inches. For those of you who are not familiar with old English coinage, this particular coin is 14.5mm diameter and 0.65mm thick.
Thanks for a great project George

You made a good machine.
I also up running it,and not as good as yours.
I'll to improve it.

[MartinB]

You made a good machine.
I also up running it,and not as good as yours.
I'll to improve it.

Watch Surfdetector's video on YouTube and set up the sample delay exactly the same for optimum performance. I also found that my coil was susceptible to EMI in my workshop so had to setup outside away from interference. Now I need to build a good coil. Good luck with your build.

[godigit1]

Tried what I thing would be comparing a MPP vs a 1C integrator in Excel. First delay 4us for small nuggets. Hole is lower for MPP. Would expect MPP noise to be 4times higher with GB enabled. Peak noise is about 3times higher when I enable GB on my detector, so maybe a little less noise with a higher TC hole. Can attach excel program if anyone wants. Have in the past but might have made some changes.

Hi Green.
Sorry for the delay in posting health went down again.
I would like your excel program if you would, It will be another learning curve but that's what keeps me going.

Got my boards and will have parts complete soon.
Code is almost done I'm having a little trouble with the timing interrupts but almost ready to try in the IDE and see if it compiles.
I realize this is not the perfect platform to do GB but once the code is done the nanno can be applied to other designs.

Thanks again

[green]

Hi Green.
Sorry for the delay in posting health went down again.
I would like your excel program if you would, It will be another learning curve but that's what keeps me going.

Got my boards and will have parts complete soon.
Code is almost done I'm having a little trouble with the timing interrupts but almost ready to try in the IDE and see if it compiles.
I realize this is not the perfect platform to do GB but once the code is done the nanno can be applied to other designs.

Thanks again

Any questions, ask.

[bernte_one]

Build mine ready, within one day.
Was very easy, all settings checked with oscope.
Big THX to George for Support
If anyone is interested in scope pictures i can upload them
https://youtu.be/Z2XFnPe3u58

[bernte_one]

Some samples:

[lc516]

I used a speaker with 32ohm,but it's sounds too low.

how should I improve it to make louder?

[bernte_one]

I used a speaker with 32ohm,but it's sounds too low.

how should I improve it to make louder?

Take a piezo, 3-12v or 5-24v rating
All normal speaker i have tested are too quiet

Not Sure if the Audio stage is working like planned

[Qiaozhi]

Take a piezo, 3-12v or 5-24v rating
All normal speaker i have tested are too quiet

Not Sure if the Audio stage is working like planned

It's exactly the same audio stage as the Surf-PI.
The audio tone increases in volume as the target gets closer to the coil.

[surfdetector]

I used a speaker with 32ohm,but it's sounds too low.

how should I improve it to make louder?

I am using 32 ohm headphones and the volume is very good.

[lc516]

I am using 32 ohm headphones and the volume is very good.

Yes,I think it's work good on headphones,but I want use speaker.
As bernte_one said,maybe I need to up the PWM voltage to 12V.

Thank your reply ,and bernte_one's