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Offline alimanTopic starter
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Trying to build one
« on: December 30, 2009, 09:11:58 pm »
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Hi ,I'm a beginner electronic hobbiest and am interested in building the Sandbanks PI detector. What alternativess to the T1 Toko 87BX135 transformer do I have.
  Any tips or help would be great. 
 
Thanks   Al

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Offline xavier
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« Reply #1 on: December 31, 2009, 07:02:53 am »
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Try this

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Regards Xavier

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So many questions so little time

Offline homefire
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« Reply #2 on: December 31, 2009, 09:13:57 am »
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There are other Transformers that will work as it only being used as voltage pump.

You could like Cornelius says and just use a second 9 volt battery.

I just sold a complete kit no long ago and have not heard from the gentlemen sence.

Some place I posted a link showing how to rewind your own. 

I'll try to find it.

EDIT:

Here you go.

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« Last Edit: December 31, 2009, 09:16:20 am by homefire »
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Offline Cornelius
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« Reply #3 on: December 31, 2009, 09:38:49 am »
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Aliman . Do you already have the complete schematic  and parts list of the Sandbanks detector .  If not , this si the first thing I would do . Try out

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www.geotech1.com
  and look under their schematics . If you have the complete file let me know . I got a spare PCB for you if you wish . But ....only when you are prepared  . I will instruct you how to use a seperate  9v battery instead of the transformer .  Cornelius

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Offline alimanTopic starter
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Trying to build one
« Reply #4 on: December 31, 2009, 10:57:35 am »
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Great response guys, thanks alot. Thats all great info, and I do have the complete Sandbanks
file Cornelius. I'm trying to gather up all the correct parts for this project, and I'm woundering if I should invest in a Breadboard to allow for final assembly testing, or should I just plop all the parts on to a PCB and hope for the best. As you can see I am a beginner, don't even have a Breadboard ! And Yes Cornelius that PCB offer sounds great.

Sincerely Al

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Offline Cornelius
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« Reply #5 on: December 31, 2009, 12:50:53 pm »
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Aliman . A breadboard is a means that is only used by somebody that cannot get hold of a PCB .  Just use a pofessional PCB . Send me your postal address on my private E-Mail number    alphaor@versatel.nl    and I will send you the PCB . Let me know when you have received it and I will stear you around the transformer  ( the transformer is not to he had anymore ) . It is a very nice detector and when it is put together the right way you will have a lot of fun with it .  Cornelius
Aliman .   I got your address . Will send you the PCB in a few days  .   Cornelius

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« Reply #6 on: December 31, 2009, 01:14:40 pm »
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Load the PCB and do the testing as prescribed in the article.  It provides a sequence and voltage checks to be made.

You will not need the parts making up the Voltage Pump if you take that route.



 Great

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Offline carlosdaniel
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sandabnaks modificated
« Reply #7 on: January 01, 2010, 08:28:16 am »
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see this link


     
(

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Carlosdaniel
Sorry this is the link



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http://www.geotech1.com/forums/showthread.php?t=11921


Carlosdaniel

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Offline Cornelius
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« Reply #8 on: January 01, 2010, 11:34:21 am »
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One word of caution . Although it looks like the Sandbanks is just another little easy to build  PI detector it takes somebody with some knowledge to build it . You should also be handy witht the soldering iron . If not , try to get some help from somebody that has build electronic gadgets before and know what he is doing . I hope Ali will be able to do it . I am going to etch a PCB for him . Hope it is not wasted ! .  Cornelius

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Offline alimanTopic starter
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Trying to build one
« Reply #9 on: January 01, 2010, 06:17:42 pm »
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Hi guys, thanks for are the help. Don't worry Cornelius I won't let you down, I'm 47 years young and had some electronics training in High School, wanted to be a Electronic Engineer, but my path changed and became a Licensed Auto Tech. I have been playing around with electronics ever since. Still a beginner in my eyes.
 One question,  I'm having trouble locating the E176  transistor, what would be a good substitute.
 Again ,thanks for everybodies help, I'm sure I can accomplish this with all your guidence.
 
 Aliman

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