datadiffusion Posted January 20, 2015 Share Posted January 20, 2015 You did say floating! Nope boat has a DIY 'alarm' PCB, the biggest reason being it's happy to run on DC only but also supports it's own battery. And very low mA as key based not lcd rkp etc Many other panels seemed to look for the 50Hz mains frequency to determine mains connected or not so hard to fool. Quote So, I've decided to take my work back underground.... to stop it falling into the wrong hands Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted January 20, 2015 Share Posted January 20, 2015 You did say floating! Nope boat has a DIY 'alarm' PCB, the biggest reason being it's happy to run on DC only but also supports it's own battery. And very low mA as key based not lcd rkp etc Many other panels seemed to look for the 50Hz mains frequency to determine mains connected or not so hard to fool. Ah, so that was the method you went with in the end. I have a couple of stripboard schematics for practically no standby current, NO circuit alarms that I use for DC supplies; like motorcycles and cars for example. They have been very reliable for my applications. Quote Link to comment Share on other sites More sharing options...
al-yeti Posted January 20, 2015 Share Posted January 20, 2015 You did say floating! Nope boat has a DIY 'alarm' PCB, the biggest reason being it's happy to run on DC only but also supports it's own battery. And very low mA as key based not lcd rkp etc Many other panels seemed to look for the 50Hz mains frequency to determine mains connected or not so hard to fool. Admit it , you have a key switch for arming , battery , micro switches on doors , and a siren Quote Link to comment Share on other sites More sharing options...
datadiffusion Posted January 20, 2015 Share Posted January 20, 2015 Not quite! It has 6 zones, 4 NC and 2 NO, and an LED per zone. Just to make it REALLY low current the LEDs don't show unless you hold a button (other than ARM) Key for arming is an eye-wateringly expensive keyed-alike Abloy, so it's the same as all the other locks and padlocks on the boat. All 3 Doors have standard MCs. As it's a steel box that's it! PA on one N/O, the rest spare Yep old Tandy buzzer for E/E. Hoisiden Beeson siren outside under seat bench, not a SAB. Ah, so that was the method you went with in the end. Reluctantly, as even if it worked the Scantronic would have pulled many mA... Still got the test lash up 9651 PCB tucked in a slot above my bench, might finish it one day! Quote So, I've decided to take my work back underground.... to stop it falling into the wrong hands Link to comment Share on other sites More sharing options...
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