Arduino Nano PI Main Discussion

[BrianBCB]

OK, obvious error, just in case anyone else makes the same mistake; the Hantek 6022BE only has a maximum input of+/- 5v (=/- 50v using 10x probe), so can't possibly measure the signal fully. With a very crude 100x attenuation now getting closer to 200v. Happy to proceed, did say I was rusty!

[Lukelearning]

Hi guys

I had the project working fine and was about to begin assembly when I started having issues with my nanos and the power that's burned out a couple of them out. Hoping someone can help before I kill my last one!

The first nano just seemed to go unresponsive
The second nano 5v pin measured about 7.5v
The third nano from a different manufacturer had a VIN pin measured 12.5v and the 5v pin about 9v before burning out.

i first thought it was just a dodgy batch but seems unlikely now.

If helpful this is my third and last spare nano I have:

https://kunkune.co.uk/shop/compatibl...le-atmega328p/


Thanks!

[Claes]

Is there anyone who can help me to find the Arduino PI sketch which should be found on Geotech acc to George Overton.
I am currently building the pulse induction metal detector described in his book with Arduino Nano.
Many, many thanks in advance for your help !
Claes.....recently member

[Qiaozhi]

Is there anyone who can help me to find the Arduino PI sketch which should be found on Geotech acc to George Overton.
I am currently building the pulse induction metal detector described in his book with Arduino Nano.
Many, many thanks in advance for your help !
Claes.....recently member

It's here -> Arduino Nano Pulse Induction Metal Detector Project - Published March 2021

[Qiaozhi]

Hi guys

I had the project working fine and was about to begin assembly when I started having issues with my nanos and the power that's burned out a couple of them out. Hoping someone can help before I kill my last one!

The first nano just seemed to go unresponsive
The second nano 5v pin measured about 7.5v
The third nano from a different manufacturer had a VIN pin measured 12.5v and the 5v pin about 9v before burning out.

i first thought it was just a dodgy batch but seems unlikely now.

If helpful this is my third and last spare nano I have:

https://kunkune.co.uk/shop/compatibl...le-atmega328p/


Thanks!

Unplug the Nano from the PCB and connect 12V between VIN (pin 30) and GND (either 4 or 29).
Then measure the +5V pin (27). If you measure 5V, then the Nano power supply is OK.

[Claes]

Tack så hemskt mycket Qiaozi !!

[Lukelearning]

I did that but it started smoking straight away!

I have 3s Li-ion NCR18650B for the power. The voltage coming from them is 12.34V do you think this is too much for the nano to handle?

Like I said it was working OK before but maybe I've charged them and that extra voltage has pushed it over the edge?

[Qiaozhi]

I did that but it started smoking straight away!

I have 3s Li-ion NCR18650B for the power. The voltage coming from them is 12.34V do you think this is too much for the nano to handle?

Like I said it was working OK before but maybe I've charged them and that extra voltage has pushed it over the edge?

That input voltage should be perfectly OK for the Arduino Nano. The User Manual says 12V, but that's the nominal voltage.
Here's the User Manual ->https://components101.com/microcontrollers/arduino-nano

There's a schematic in the manual which shows that the voltage regulator is an UA78M05, which has an input voltage range of 7V to 25V.
https://www.alldatasheet.com/datashe...I/UA78M05.html

I've powered the Arduino Nano with a lithium battery pack of several occasions with no magic smoke being released.
I suspect you have some poor quality / dodgy devices.

[Lukelearning]

That input voltage should be perfectly OK for the Arduino Nano. The User Manual says 12V, but that's the nominal voltage.
Here's the User Manual ->https://components101.com/microcontrollers/arduino-nano

There's a schematic in the manual which shows that the voltage regulator is an UA78M05, which has an input voltage range of 7V to 25V.
https://www.alldatasheet.com/datashe...I/UA78M05.html

I've powered the Arduino Nano with a lithium battery pack of several occasions with no magic smoke being released.
I suspect you have some poor quality / dodgy devices.

Just a small update - it was the cheap clones. Using a legitimate nano solved my issues

if its useful to anyone I got the first 2 from Tayda (1 worked fine for a while) the second 2 I got from kunkune that started smoking straight away

[Qiaozhi]

Just a small update - it was the cheap clones. Using a legitimate nano solved my issues

if its useful to anyone I got the first 2 from Tayda (1 worked fine for a while) the second 2 I got from kunkune that started smoking straight away

Thanks for the update.
Hope the rest of the build goes OK.

[Tanu]

Thanks for the update.
Hope the rest of the build goes OK.

can i use with larger coil < 50 cm
For river floodplains and lands

[Qiaozhi]

can i use with larger coil < 50 cm
For river floodplains and lands

You can use it with any size coil.

[Prince Zhakata]

Can any one have the source cod file for for this?

[Qiaozhi]

Can any one have the source cod file for for this?

It's here -> Arduino Nano Pulse Induction Metal Detector Project - Published March 2021

[cristiano.sar]

Is it possible to use an IRF840 mosfet without too much changes? What would be the benefits or drawbacks of it? Thanks.