Pistol Detector - TOTeM (Complete Details)

[d4rkh00d]

Note that D1 limits the voltage across the "meter + R24" combination to 0.7V. Without R4, the current through the meter would be: 0.7V / 675 = 1.04mA. This is clearly too high for the 250uA meter. Hence R24 (3k) is used to limit the maximum current to: 0.7 / (3k + 675) = 190uA. The slightly lower then 250uA value stops the meter needle banging against the meter stop when a large signal is received.

All you need to do is replace R24 with a suitable value for your meter. Let's say (for example) your meter is 100uA full-scale deflection (FSD) with 1k5 resistance. A total resistance of 0.7V / 100uA = 7k. Hence, R24 needs to be 7k - 1k5 = 5k5 (or slightly higher). A simple solution would be to replace R24 with a 10k multi-turn preset, and manually adjust it to suit your particular meter.

It should also be obvious that your chosen meter needs to have an FSD of less than 1.04mA.

Thank you very much Qiaozhi. You are a great help.

[mahinda]

please tell me ...what is the totem's circuit active passive switch ? how search ?

[abdou2014]

Active means transmit and receive, Passive means only receive .

[humhum]

Detection

PD can closely detect new metal. For discrimination, you must find null line. check your digital meter.
If your pd has been created correctly, number of the meter is decreased when you close it to ferrous metal (iron rejection) !

Hi HaFar2010, I See in Video that PD of your clien Detect buried metal without moving PD from Left to Right or Right to Left , my question is with How Method works it. (Ferite+Magnet etc...or ...).

[HaFar2010]

New PD

Hello
Dear All.

According to my previous posts,
my first PD has great successes
because my clients not only sent me their successes and feedbacks
from different countries, but also they proposed me several suggestions.
After analyzing the feedback and much effort, finally my new TOTEM PD is ready!
the version has a special package and higher sensitivity to gold!
Circuit of the PD is TOTEM, but I did a small change inside it in order to getting high stability.
You can see the pd in following link:

https://youtu.be/2yxum1iiJJ8

[HaFar2010]

New test by client

Please see the video!!!

https://youtu.be/J2kxPiyfgJI

[WM6]

Video prove nothing. One more promo scam.

[abdou2014]

QUESTION

How to make this transmitter more powerful ?

[detectoman]

very easy abdou only should you put to finally output other step whit other most big transistor in total 2 transistors in serie or 2 complementaries transistors

[abdou2014]

HELP US WITH A SCHEMATIC / THANK YOU

[HaFar2010]

Hello Dear All
Does anyone have original circuit of Alonso's PD ?
Please send it
Thanks

[HaFar2010]

Hello
Dear All.
My new TOTEM PD is ready.
In the version, there is no potentiometer.
You can see its pics and video in follows:


The youTube link is:

https://youtu.be/dGmxUAq_6lI

[jokoboko]

ferrite antenna

Please tell the size of the ferrite rod. How many windings do you need? What kind of wire thickness

[kostask]

totem connection

I need help with the totem pd connection's and the switch. a wire diagram thanks

[Qiaozhi]

I need help with the totem pd connection's and the switch. a wire diagram thanks

Look at post #1. The complete details are there.