Delta Pulse - Take 2

[Tanu]

Delta pulse 2
coil 40 cm

Hello
how to make this coil housing

[kt315]

last actions before the shipment. must do a video.@AK48 #AK48

[AK48]

Sorry , i like ...

[kt315]

amigos, say hello to new member!

I am Geotech under zavila you did say you gona pass some filesBut p cad viewer can do nothing with no files lol.As i said i am like to finish this delta pulse project so i can go metal hunting , i am not looking to reproduce or sell I am new in eletronics and learning .Could you let me kno please and could you explain how to tune the ressistor if in need some one to show me . Thanks again

[kt315]

PCB file. you need just to trace it and you will get the pcb. you do not go full way from a schematic, you do right just the pcb.

[anas,ru]

Hello
I've completed the Delta Plus 2 project, but when measuring the frequency between the coil terminals, I get a range of 108 to 139 Hz.
I've seen some posts here talking about 300 Hz.
Another problem: The device is stable on small coils and detects a coin at a distance of 30 cm, with 40cm coil but the large coil is unstable.

[GeoMax]

Hi Anas,ru

probably you need to adjust the damping resistor and match it with your bigger coils.

[Emersonpaz]

Large coils act as antennas, make sure you are far enough away from the power line to do this test. And as suggested by GEOMAX, check the coil's damping resistor.

[kt315]

Hello
I've completed the Delta Plus 2 project, but when measuring the frequency between the coil terminals, I get a range of 108 to 139 Hz.
I've seen some posts here talking about 300 Hz.
Another problem: The device is stable on small coils and detects a coin at a distance of 30 cm, with 40cm coil but the large coil is unstable.

is your country with 50Hz or 60Hz standart in the power lines? with 300Hz you will have in 300/100 = 3 times much consumption of your batt Amper clock value.
while... thinking with atomic batt on isotopics using you can sure increase the freq to 3000-10000Hz.

[anas,ru]

Hi Anas,ru

probably you need to adjust the damping resistor and match it with your bigger coils.

Hi GeoMax
I use the same components as in the schematic R5=2.2k / 1W.
40cm coil =2.7ohm------ 1.2m coil = 1.9ohm

[anas,ru]

is your country with 50Hz or 60Hz standart in the power lines? with 300Hz you will have in 300/100 = 3 times much consumption of your batt Amper clock value.
while... thinking with atomic batt on isotopics using you can sure increase the freq to 3000-10000Hz.

thanks for reply kt315
The frequency on the power lines is 50 Hz.
My question about the (300Hz) is to ensure my project is operating normally

[anas,ru]

Large coils act as antennas, make sure you are far enough away from the power line to do this test. And as suggested by GEOMAX, check the coil's damping resistor.

Hi Emersonpaz
I had the same problem with Felezjoo Pi..... so I made Delta Pulse2 and I got the same problem.

[GeoMax]

What do your oscilloscope images look like at the output op-amp for each connected coil?

[anas,ru]

What do your oscilloscope images look like at the output op-amp for each connected coil?

Unfortunately, I don't have an oscilloscope.
I'll try to work on software that uses the computer's microphone input.

[anas,ru]

reloaded.
just DP files https://drive.google.com/file/d/1EIo...ew?usp=sharing
whole archive https://drive.google.com/file/d/1zyQ...ew?usp=sharing