| General > General Technical Chat |
| Car alarm siren issue |
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| Zero999:
--- Quote from: slybunda on February 10, 2024, 03:03:59 pm ---Toad alarms said they can sell me a replacement siren which is at a ripoff price. No warranty since alarm comes with 1 year warranty and iv had it for over 20 years. --- End quote --- What's so special about this siren? Have you looked into replacing it with a third party one? It's likely that's the most economical solution. |
| NiHaoMike:
I would fit a pair of SPDT relays to the existing car horns, wired so that by default, the horns operate as usual and activating the relay activates each horn individually. Then use a classic 2 transistor oscillator to alternately operate the relays when the alarm is sounding to give a high/low cycling rather than the usual car horn sound that often gets ignored. |
| mendip_discovery:
--- Quote from: Zero999 on February 10, 2024, 05:07:31 pm --- --- Quote from: slybunda on February 10, 2024, 03:03:59 pm ---Toad alarms said they can sell me a replacement siren which is at a ripoff price. No warranty since alarm comes with 1 year warranty and iv had it for over 20 years. --- End quote --- What's so special about this siren? Have you looked into replacing it with a third party one? It's likely that's the most economical solution. --- End quote --- Surprised they weren't more amicable. Good luck with the repair, if all else fails you could DIY or get a better unit. |
| slybunda:
--- Quote from: NiHaoMike on February 10, 2024, 07:27:37 pm ---I would fit a pair of SPDT relays to the existing car horns, wired so that by default, the horns operate as usual and activating the relay activates each horn individually. Then use a classic 2 transistor oscillator to alternately operate the relays when the alarm is sounding to give a high/low cycling rather than the usual car horn sound that often gets ignored. --- End quote --- The alarm doesnt use the car horn it uses its own speaker |
| AVGresponding:
I think NiHaoMike is suggesting you use the alarm output to switch the car horn via an oscillator/relays. This of course will only work if the alarm active output still works as it should. If you need replacement sirens I have any number of old fire alarm sounders, a sample of which you could have for the cost of postage. There are some fully potted piezo types which would probably work best. |
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