07-06-2015, 06:15 PM
Thanks again for the additional input guys.
The alarm has been made on the PCB I posted above, and I'm pleased to say that it works!
Piezo sounders on order from e-bay - (£1.79 each, plus 79p post - "buy two get one free"!).
http://www.ebay.co.uk/itm/Piezo-Buzzer-Sounder-12V-DC-85dB-Buy-Two-Get-One-FREE-/121654890049?pt=LH_DefaultDomain_3&hash=item1c53324e41
85dB at 30 CMs.
Not quite as loud as police car, but as loud as a passing diesel truck or snow blower:
http://www.noisehelp.com/noise-level-chart.html
Loud enough innit?
The alarm has been made on the PCB I posted above, and I'm pleased to say that it works!
Piezo sounders on order from e-bay - (£1.79 each, plus 79p post - "buy two get one free"!).
http://www.ebay.co.uk/itm/Piezo-Buzzer-Sounder-12V-DC-85dB-Buy-Two-Get-One-FREE-/121654890049?pt=LH_DefaultDomain_3&hash=item1c53324e41
85dB at 30 CMs.
Not quite as loud as police car, but as loud as a passing diesel truck or snow blower:
http://www.noisehelp.com/noise-level-chart.html
Loud enough innit?
Regards, David.
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
BVWS Member.
G-QRP Club Member 1339.
'I'm in my own little world, but I'm happy, and they know me here'
