[x] Welcome at THunting.com!

A fun place to talk about Metal Detecting, Treasure Hunting & Prospecting. Here you can share finds and experience with thousands of members from all over the world

Join us and Register Now - Its FREE & EASY

THunting.com
Treasure Hunting & Metal Detecting Community
   
Advanced Search
*
Welcome, Guest! Please login or register HERE - It is FREE and easy.
Only registered users can post and view images on our message boards.
Did you miss your activation email?

Login with email, password and session length
Or Login Using Social Network Account
2
News:
Pages: 1    Go Down
Print
Share this topic on FacebookShare this topic on Del.icio.usShare this topic on DiggShare this topic on RedditShare this topic on Twitter
Tags:
0 Members and 1 Guest are viewing this topic.
Offline mykaitchTopic starter
Copper Member
*

Join Date: Feb, 2012
Thank you1

Activity
0%

United Kingdom
Posts: 25
Referrals: 0

160.00 Gold
View Inventory

Awards
« on: March 05, 2012, 07:58:20 am »
Go Up Go Down

As you can see (a photographer I ain't), the PCB used is Veroboard. I wanted a tidy build so the long connector goes to all the controls on the front panel (that and the three pin to the disc pot).
I made a few changes; All 20k changed to 18k, all 200k to 220k.
I used 2 TL084 quad opamps, an LM358, TL7660 ( - volts), LM555 (CMOS 555 for low batt alarm) and a 74HC4024. The 4024 will go soon when I decide the sound I want. I added decouplers to all ICs and (later) found that screened cable for the disc pot (and earthing the pot case) was a good thing to do, even thought the wires are only 4" long.
It was all pretty straight-forward. Bit tight aruond second TL084. I only used these chips because I have a pile in my boxes - as I said, my top limit was $20.00 or 15.00 in real money, or what, 1000 Euros in Monoploy money ? Cheesy

If you use that cheap vero (it isn't Vero) from Ebay be warned : it is so easy to make spiders across the tracks because it does not have the same 'void' as Vero. Always run a blade along the gaps when you are done and brush off with IPA.

The caps are all cheap (well what else) ceramic discs and work fine.Reulator is OTT, but hey, it was cheap. Smiley

Nothing much more to say about the board really - I did not have the right switches in the bin so I have used a DPDT for Disc/metal. An SPST biased for Retune and a SPST for Auto. also added a volume control (the correct way - put in series with the cans is a bit of a waste of time).

Current consumption with a loud sound, is 37mA - I did have a fault (track spider) that puoshed it up to 44mA - but it still worked. When I fixed the fault the current was back to 37mA again and it did work better. I also added a 20M across the auto switch.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,35410.msg215443.html#msg215443



There are 1 attachment(s) in this post which you can not view or download

Please register for viewing them.

ban4.jpg


Logged
Offline toomany2
Copper Member
*

Join Date: Feb, 2012
Thank you0

Activity
0%

United States
Posts: 30
Referrals: 0

125.00 Gold
View Inventory

Awards

White, XLT, coin master, wizard
« Reply #1 on: March 06, 2012, 02:31:08 pm »
Go Up Go Down

Just curious, why the Bandido 2...altho you call it the Bandero? Have you thought about building something with PI?
R

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,35410.msg215638.html#msg215638




Logged
Offline mykaitchTopic starter
Copper Member
*

Join Date: Feb, 2012
Thank you1

Activity
0%

United Kingdom
Posts: 25
Referrals: 0

160.00 Gold
View Inventory

Awards
« Reply #2 on: March 09, 2012, 01:57:16 pm »
Go Up Go Down

Hi. Yeah I do get the name wrong. Tried it outside today - great! Disc mode really good - found no nickles dimes or quarters. Grin
Okay, I looked at a whole lot of circuits and I liked the Bandido design. Couldn't really see why I would want a PI type. The main factor for me was 'could I wind the coils ?1'. I have also messed with the stick and it is now comfortable to use (balanced). Not yet been hunting but soon....Did find that the ground balance control seems to do nothing so  I have set it in the middle and  left it.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,35410.msg215917.html#msg215917




Logged
Offline toomany2
Copper Member
*

Join Date: Feb, 2012
Thank you0

Activity
0%

United States
Posts: 30
Referrals: 0

125.00 Gold
View Inventory

Awards

White, XLT, coin master, wizard
« Reply #3 on: March 09, 2012, 02:36:40 pm »
Go Up Go Down

Read somewhere the PI type was best for hunting gold, and most everything else. More depth etc.
Coils are cheap, right? You're building the expensive part, circuitry.
Well, good luck when you get it out and hunting!
Rob

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,35410.msg215929.html#msg215929




Logged
Offline Homefire
Global Moderator
Platin Member
*****

Join Date: Jan, 2009
Thank you661

Activity
0%
Male
United States
Posts: 15906
Referrals: 0

52360.00 Gold
View Inventory

Awards
« Reply #4 on: March 09, 2012, 02:58:14 pm »
Go Up Go Down

Eugene52 is working on a Working LoBo.   After it's proved up it will be a Kick Butt machine.

Until then Silverdog has kits for the TGSL that is close.

We have Options here.

Linkback:

You are not allowed to view links.
Please Register or Login

http://www.thunting.com/smf/index.php/topic,35410.msg215934.html#msg215934




Logged
Print
Pages: 1    Go Up
Jump to:  

Powered by SMF 1.1.19 | SMF © 2005, Simple Machines | Sitemap
Copyright THunting.com