Guru
Joined: 08/02/2015
Location: New ZealandPosts: 1255
| Posted: 12:34pm 07 Aug 2021 |
I'm extending our security system to include a remote alarm driver that can be linked to the existing system or used as a stand alone alarm unit.
Some of the noise makers used to wake the dead are sirens and large truck horns; these draw upwards of 30 odd amps off a localized 12v battery, the existing system wont really handle this unless I used heavy duty relays; so I thought an upgrade is in order.
The truck horns driver will melt if run too long, so have to be switched on\off to limit heat build up. Some of the LED lamps will be flashed at a suitable confusing 10 - 13 Hz rate; thus requiring high power mosfet switches.
Included is a simple PWM battery charger to keep the 12 volt LA. battery topped up.
Will use a Pi Pico cpu module (u-Python) to run the system. Here is progress to date:
Cheers
Mike