Easy Detector

[kuraja]

Hi! Friday! Have you tried the coil? What are the impressions? Do you need to make a 1.9mH inductance coil or....???

[kuraja]

CS 550 Minidisc is a TR locator! It has a frequency of 100kHz. So if you make a coil of 6mH then you should put like 500pf capacitor.
I checked it really is a TR locator, Not a VLF!

[kuraja]

CS 550 Minidisc is a TR locator! It has a frequency of 100kHz. So if you make a coil of 6mH then you should put like 500pf capacitor.
I checked, it really is a TR locator, Not a VLF!
I guess original coils of cscope have like 1.9mH inductance because when you add 47nf capacitor,parallel, you get 16842 KHz which is roughly 17Khz.
Uf! And I thought it was easy detector....

[kuraja]

OK! Here is the deal! This is a nice detector to make! Problem is coil! Just use your imagination and make a coil good enough to oscillate at 100khz. I changed a few transistors and can say that it works on a test coil. Disc and sens are mounted to fit in a small box along with one 9v PP3 battery. Sound is strong and stabile also.
Here is the lay file. enjoy!!!

[nelson]

Hi. From this link, you can get the manuala and a field test report in .pdf format.
http://www.csmetaldetectors.com/archive.aspx

Regards
Nelson

OK! Here is the deal! This is a nice detector to make! Problem is coil! Just use your imagination and make a coil good enough to oscillate at 100khz. I changed a few transistors and can say that it works on a test coil. Disc and sens are mounted to fit in a small box along with one 9v PP3 battery. Sound is strong and stabile also.
Here is the lay file. enjoy!!!

[ApBerg]

Coil

Hello Kuraja,

Thanks for the pcb !
Can you make a coil that works at 17kHz-19kHz,( tune with caps) test this coil on your pcb ? ( for me it works ok)
Start with 50-50 TR windings and 100 receive windings 0.25 mm and searscoil diameter 20 cm.
I think the minidisc is 17-19 kHz !?? Have you checkt the 100kHz on a original working detecor ?

Best Regards.

Ap

[kuraja]

OK! I will try that but I am out of wire now (been making those TGSL coilz), but I promise I will test it with 17khz and 100khz!

[Legaucho]

Hello Kuraja,

Are you sure about your lay file?

i.e: On 4024 circuit pin 8 ( must be 7 ) and also capacitor 100uF the positif is in the wrong way, there is also other difference on circuit.

Can yoi check? It looks strange.

Best regards
Luc

[kuraja]

Hi luc!
This is corrected version.

[Legaucho]

Hi luc!
This is corrected version.

Many thanks Kuraja.
Luc

[T-bass]

Hello, I'm interested in this proyecto.me like to build, but corrected the pcb is not clear where to connect the center of the coil is rx-tx but the center?. I do not see where to connect the favor if altavoz.por You have more information about this project ponedlo.un greeting

[T-bass]

CS550

Hello, I'm interested in this proyecto.me like to build, but corrected the pcb is not clear where to connect the center of the coil is rx-tx but the center?. I do not see where to connect the favor if altavoz.por You have more information about this project ponedlo.un greeting

[pebe]

Your posting doesn't make sense. Why don't you go through it and make sure it says what you mean to say, before posting?

[T-bass]

easy detector

hola,debe ser por una mala traducción de google traductor.lo que quiero decir es que en la version corregida solo veo dos puntos para conectar la bobina,rx-tx.¿tengo que conectar el centro de la bobina a tierra?la bobina terminada debe tener 3 conexiones mas pantalla,100 espiras con toma central a la 50ª y construir un escudo en la bobina tambien conectado a tierra.¿estoi en lo cierto? gracias,un saludo

[TH Jim]

Try Babel Fish @ altavista

hello, it must be by a bad translation of google translator which I mean is that in the corrected version I only see two points to connect the coil, rx-tx. I must connect the center of the coil to earth? the finished coil must have 3 connections but screen, 100 turns with central taking to 50ª and construct a shield in the coil also connected to earth. estoi in the certain thing? thanks, a greeting