Bell rings when garden gate opens?
"zaax" wrote in message
news:S0uSn.35978$OF3.17205@hurricane...
Timothy Murphy wrote:
My small city garden has a standard Victorian railing
on the street, with the gate as part of the railing.
A few days ago someone came in the garden and stole
a (locked) bike.
This made me wonder if there is any simple way
to make a bell ring when the gate is opened?
Also, is there a standard spring which will
keep the gate closed?
yes micro-switch and a bell and a battery
Why two?
Siu
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