Delta Pulse

[Qiaozhi]

Your first post in the forum is not allowed to contain any attachments or links. If it does, it automatically goes into moderation and needs to be approved by Admin. This is part of our anti-spam procedures.

I have now approved your posts, and there should be no further problems with any attachments.
Also, I have removed your duplicate post of #3393.

[ficuss]

Here are my oscillograms to the previous post.

TR1
http://i68.tinypic.com/33m1yip.jpg

TR2+TR3
http://i66.tinypic.com/344tl5j.jpg

TR3+TR4 min
http://i63.tinypic.com/jkukoo.jpg

TR3+TR4 max

http://i66.tinypic.com/2dilvgm.jpg

TR4+TR5 100us
http://i63.tinypic.com/107jq5y.jpg

[ficuss]

Greetings to you, brothers and sisters!

I assembled the device on a single-sided Board.
Immediately am asking forgiveness, that my of knowledge in radio electronics not strong, so can be quite elementary questions). No offense :-)

All the parameters of the component was observed.
The test coil is 40cm in diameter, 24 round solid conductors mm 0.5 - 3 coils 8 core Ethernet cable soldered into a single line. 390ohm coil damper resistor. Energy consumption 130-150mA. ICS and irf740 are not heated.
When the power is turned on, the device responds to all the variables of the torsion bar, reacts to the reset button. The sound from clicks to high tones. The coil reacts to the metal. Oscillogram meet the requirements, the pulse width TP2, TP3 and intervals TP3-TP4 TP4-TP5 within the acceptable range, change the adjustment of the respective variable resistors.

The only thing I don't like about oscillograms is the pulse width of TP4 and TP5 = 25.9 us, while it should be 45us.
Can this mismatch somehow adversely affect the operation of the device? How to adjust the correct pulse width? Currently, the sensitivity to iron pliers is about 30-35cm. I'll shoot a video later. That's not much. How to increase sensitivity?
The aluminum can is 30 cm high and 12cm in diameter, the sensitivity is poor, fewer than pliers, which are much smaller. Due to what it is possible to increase sensitivity to non-ferrous metals?

WBR, ficuss/

[kt315]

you can set also 4.64k or 4.75k but then all values on board have to be same -!

[kt315]

pcb from China. i get pics on my email. guys, 4.72kOhm resistor value is my mistake. set 4.70k.

http://www.logwell.com/tech/components/resistor_values.html

[beiduo]

OK

[kt315]

please do not overload my email of your bare requests and write here.
i need in regular mention of DP.

[beiduo]

Beautiful boards are very good at work thanks to TK

[kt315]

BOM file

[kt315]

辽金元

[kt315]

board from

辽金元

[UnHappy]

https://dfiles.ru/files/kr7c0n5pm?redirect

wow

[kt315]

https://dfiles.ru/files/kr7c0n5pm?redirect

[chafik]

Hey Kt315 where can I get your archive file contain all deltapulse files

[abdennour]

i have frequency counter 0-10 Mhz , but they told me that the frequency meter can not measure or display the output frequency ???