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In this Instructable I will teach those of you that don't know how to make a simpledoor alarm that's also cheap.
You will need:
about 2 inches of a wide cable with no wires in it
2 ringing alarms
1 piece of cardboard [about 1X4inches]
about 1.5 feet of wire [1/2 red, 1/2 black]
1 2.7 volt capacitor [this will boost the small battery]
1 1-volt lithium battery
1 regular size paperclip
2 tiny pieces of scrap metal [you can find in alleys]
Optional:
wire tape [very handy and keeps you safe from shocks]
plastic clip [handy if wires need to be pinched together to complete the circuit]
You will need:
about 2 inches of a wide cable with no wires in it
2 ringing alarms
1 piece of cardboard [about 1X4inches]
about 1.5 feet of wire [1/2 red, 1/2 black]
1 2.7 volt capacitor [this will boost the small battery]
1 1-volt lithium battery
1 regular size paperclip
2 tiny pieces of scrap metal [you can find in alleys]
Optional:
wire tape [very handy and keeps you safe from shocks]
plastic clip [handy if wires need to be pinched together to complete the circuit]
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Signing UpStep 1Let's Get Started!
''''''''''''''''''''''''''''''''''''''''''''Ready?''''''''''''''''''''''''''''''''''''''''''''''Okay now let's begin!
Start by twisting the wires on the two ringers.
Start by twisting the wires on the two ringers.
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Jan 1, 2010. 8:10 AMchilll2009 (author)
says:
Sorry for the suckish photos...
Dec 9, 2011. 4:08 AMVictor Moser
says:
D:
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