I CAN ???

[diminute]

I can use a ION LITIUM battery for a DP MD ???


I have a 14.4 Volts Ion Litium Battery of Toshiba Laptop (1300 mAh), but i don't know if is suitable for use in metal locators. I think that using this batery with a 7812 IC (and 6800 to 10000uF capacitor) I can use in Delta Pulse ????

Thank for yours helps

diminute

[Geo]

You can use it. Connect in series 3 diodes 1N4001 to decrease the voltage.

[Geo]

You can use it. Connect in series 3 diodes 1N4001 to decrease the voltage.

[diminute]

Ok, AND???

How Many Time can operate DP MD with 1300 mAh batteries ???


Thank, GeO

diminute

[Max]

How Many Time can operate DP MD with 1300 mAh batteries ???


Thank, GeO

diminute

Hi diminute,
if you have a DVM or a milliamp-meter (200+ ma es) you must measure current consumption in silent mode at maximum freq.

Then you must divide battery pack capacity by you measured current value.

Example:
- you measure 200 ma in silent mode at max frequency setting
battery will last --> 1300ma/h / 200 ma = 6.5 hours

But don't rely too much on capacity specified on the battery.
Maybe they will last for only 5hours or less. It depends also on your charger/
charging schema and other factors.

Best regards,
Max

[Geo]

With normal coil Delta Pulse need 100...130 ma in silent mode. So if the batteries are good, maybe 8...10 hours. If you have the coil with 1x1m then you need 170 ma, so maybe 5..7 hours. But the capacity of batteries is a big story....

[diminute]

Ok,

I don't know why the MD don't use ION Lition Batteries ??

All model that i saw use another types of batteries...

Pasivation can be a problem with PI detector cause the pulse use much current.


Thank for your answers

diminute

[Geo]

I think for cost. Ion Lithion Batteries are better but more expensive. I don't know any other reason. I use at my detectors Ni-Mg (Nickel-Magnisium).

[Max]

batteries

I think for cost. Ion Lithion Batteries are better but more expensive. I don't know any other reason. I use at my detectors Ni-Mg (Nickel-Magnisium).

Hi Geo,
I've used Ni-Mh with my GS4 clone proto...but have lot of problems with first pack (15v -1300mah) because of higher internal resistance...then capacity that nominal say 1300mah but real is for sure less.
Now I'm testing matsu****a 2700mah having good results.
Anyway, I think that when I'll end up with a PCB finished I must switch back to lead acid batteries...low internal resistance but heavy...that seem better with huge PI current drain. But I cannot find any 16V lead acid till now...so I must make something (dc-dc converter, or modify the circuit).
At the moment I had 250ma steady in silent mode !
Also Li-ion seems a good idea but never tested on a PI.

Best regards,
Max