Underwater PI detector

[Geo]

Hi Waikiki_Sweep
could you upload this photo in its original file and please if you have its PCB just upload it also
and also the list of components
i will be gratful for you

thanks in advance
Mohamed Ghitas

Hi.
At the follow adress http://www.silverdog.co.uk/shop/index.php you will find the schematic and the part list. Also you can order the pcb.
Pcb is a high quality double side at very cheap price.

[Mohamed Ghitas]

Hi. At the follow adress http://www.silverdog.co.uk/shop/index.php you will find the schematic and the part list. Also you can order the pcb. Pcb is a high quality double side at very cheap price.

For sorry it is not available to sop in my country if you can post to pcb please

[Waikiki_Sweep]

Hi Waikiki_Sweep. I'm searching for a way to re-use Li-Ion batteries in my MD's, and one of the things I am having difficulties with is to find a DIY charger that I could use with confidence. Can you tell me what kind of charger you use for your MD? it would be great if you have a schematics too.
Fabian

I am using cheap chargers from eBay. http://www.ebay.com/sch/i.html?_nkw=18650+charger You can buy one starting $2.45 free shipping.
Quality not always great but from 5 chargers I have selected 3 working good. You can always check result with testers to be sure that charger cut of charge at 4.2 volts. (Some of them did not)



If you want to build one DIY you can use chip MAX1555

http://datasheets.maximintegrated.co...51-MAX1555.pdf

[Waikiki_Sweep]

For sorry it is not available to sop in my country if you can post to pcb please

I got my from silverdog http://www.geotech1.com/forums/showt...ock-NEW-Prices
We all thankful ApBerg for the longboard layout http://www.geotech1.com/forums/showt...f-PI-schematic

[Waikiki_Sweep]

Cable Gland Waterproof

Do not forget to buy Cable Gland on eBay. For example http://www.ebay.com/itm/130750191474
20pcs PG7 PG07 Waterproof Connector Gland Dia. 3.5-6mm Cable

It will help you to waterproof your coil and headphone cables where they go to box.
Buy as smaller size as possible that fits your cable diameter to get better waterproofing.
It is cheap, easy to install, easy to insert and remove cables when repair is needed.
Also seller shipped it from China less then in one week. That is surprising.




No. D1(mm) D2(mm) L1(mm) L2(mm) L3(mm) L4(mm) B1(mm) Cable Range(mm)
PG7 12.0 8.1 9 5 15 14.0 6.4 3.5-6
PG9 16.0 11.0 9 5 15 16.0 8.6 4-8
PG11 17.9 13.0 9 5 18 18.0 10.7 5-10
PG13.5 20.2 15.0 9 5 20 19.0 13.3 6-12

[Fabian]

Thank you very much, Waikiki Sweep.

Fabián

[hispalba]

Hi everyone this is my new design of waterproof box. Its very easy to make. only you need the next materials acrylic, glue, screws, o-rings etc. In few days Ill explain the making procedure

[Waikiki_Sweep]

Hi everyone this is my new design of waterproof box. Its very easy to make. only you need the next materials acrylic, glue, screws, o-rings etc. In few days Ill explain the making procedure

Where did you get a pipe?

[Dixix]

Hello Waikiki_Sweep
Which brings me to an idea: Could I not use the water proof Cable Gland for potentiometer? (Pot with long shaft) At least to the circuit to protect against splashes.
Dirk


Surely I can do that in a device-a plastic bag even in stormy weather ....

[Waikiki_Sweep]

Hello Waikiki_Sweep
Which brings me to an idea: Could I not use the water proof Cable Gland for potentiometer? (Pot with long shaft) At least to the circuit to protect against splashes.
Dirk


Surely I can do that in a device-a plastic bag even in stormy weather ....

That is interesting idea. Probably it may works. You just need to buy smaller of Cable Gland and use some lubricant like silicone lubricant for O-rings. I am using corn oil to lubricate O-ring in my waterproof camera case detector. It works well for few years already but with time corn oil hardening and I have to clean it out.
Do not use mineral oil based lubricants because it will destroy rubber ring inside Cable Gland.

I have used more expensive solution in my detector: HEXSEAL from Digikey. It is nut with silicone sealing you can put on regular potentiometer.
http://www.geotech1.com/forums/showt...867#post153867

[ionut_mtb]

This is a good thread for underwater detector. What about type of cable and epoxy for coil. (pvc coated litz wire with alu shield)

[jaypay]

Could you use magnets? one on the inside of the case on the shaft of the pot and one on the outside under some kind of knob.

[ionut_mtb]

somebody already done that, picture is from this forum but i dont know exactly where. only one magnet outside. i think best solution is apm hexseal.