Hi folks
I have bought a 12VDC car horn for an alarm system.I have used a 12VDC transformer +full wave rectifier to reduce/convert the 220VAC to 12VDC.
When i turn the system on,the alarm is almost inaudible.The 60db horn cannot be heard 2 meters away .But when i flick the - ,+ wires gently at their contacts,it blares loudly.But when i solder the same -and+wires firmly in place it is almost inaudible.
Why?
I have bought a 12VDC car horn for an alarm system.I have used a 12VDC transformer +full wave rectifier to reduce/convert the 220VAC to 12VDC.
When i turn the system on,the alarm is almost inaudible.The 60db horn cannot be heard 2 meters away .But when i flick the - ,+ wires gently at their contacts,it blares loudly.But when i solder the same -and+wires firmly in place it is almost inaudible.
Why?