Crowbar is a circuit that places a short circuit across a power
supply in the event that a fault occurs that results in the
power supply providing a higher voltage than the circuit can
handle. The crowbar tripping will usually result in the power
supply going into current limit mode or (in the event it is
completely cactus) blowing supply fuses.
board is for two independent crowbars, one set up for a
positive supply rail, the other for a negative supply rail,
this makes it ideal for protecting audio equipment such as
mixing consoles. The positive crowbar uses part references from
1 to 10 (i.e. R1 to R5) while the same parts in the negative
crowbar have 10 added (i.e. R11 to R15).
entire circuit fits on a single circuit board measuring 60 by
65mm. Making this compact enough to fit into most equipment.
the cost of Electronic components and shipping from Australia
is not cheap, so I am selling these as short form kits (PCB,
Instructions and any programmed parts) rather than complete
the moment I am selling these through Ebay which for
this project includes:
if you require any more info....
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