my first russian pirate pi

[kt315]

all ok!
can you advise me for a good kit to build?

try ask MIRAGE from Sven.

[gando]

SOLVED: russian pirate pi need 12Volt for a good performance!
i soldered a dc dc step up on a mother board with 5V mini usb power bank to 12V.
now i hear a coin 1 Euro at 6-7 inches.
thanks to all!!!
next project will a Surf PI...coming soon

[kt315]

not. not needs 12V but needs MORE AMPERAZH. the CURRENT. ie that you see on a batt 'mA*h' value, sh-t digits you do not understand
for what they are.
your value was '800 mA*h' and it was VERY SMALL for PI system because 9V batt has big inside resistence.
now you took li-ion power bank with >=5000 mA*h.

[dbanner]

My Russian pirate pi use 9 volt alkaline Duracell, I got 6 inches on most coins. Hmm.
I not use sophisticated expensive fancy li- ion for such sardine fish soup.

[kt315]

please do not compare alkaline batt with ni-cad and Ni-MH batts.
even better Ni-MH CAN NOT BE better than alkaline.
also you compare Duracell that is PEAK OF BETTER from alkalines.
i do not compare VOLGA GAZ-24 car with FORD MUSTANG in the context. notice that.

[dbanner]

please do not compare alkaline batt with ni-cad and Ni-MH batts.
even better Ni-MH CAN NOT BE better than alkaline.
also you compare Duracell that is PEAK OF BETTER from alkalines.
i do not compare VOLGA GAZ-24 car with FORD MUSTANG in the context. notice that.

Yes indeed, macaroni soup vs caviar. Pulse induction is all about juice of battery and not strictly voltage.

[kt315]

what is pulse induction. its simple key on MOSFET that shorting battery's clemmas.
ie short circuit. that lays on very big value on batt condition. you can not use poor batt with big internal resistance in pulse induction system.
http://www.learningaboutelectronics....of-battery.png

[gando]

not. not needs 12V but needs MORE AMPERAZH. the CURRENT. ie that you see on a batt 'mA*h' value, sh-t digits you do not understand
for what they are.
your value was '800 mA*h' and it was VERY SMALL for PI system because 9V batt has big inside resistence.
now you took li-ion power bank with >=5000 mA*h.

i used 9Volt rechargeable battery (exactly 8,2Volt) with 800mhA
now i use 5Volt usb power bank 1400mhA with DC DC step up to 12Volt

[gando]

it’s possible to add a led?
I would like it to light up when it sounds... any idea?
this is electric schema:

[waltr]

Resistor and LED from output of second IC pin 9 (opamp/comparator) to ground.