Les Henson Posted June 25, 2009 Share Posted June 25, 2009 I just bought one of those that are advertised in the For Sale section, but I'm not sure what buzzer is suitable for it. Does anyone know what/where I can get one from (Maplins?). A linky to the exact thing I need would be excellent please. Les. Quote Link to comment Share on other sites More sharing options...
errol209 Posted June 25, 2009 Share Posted June 25, 2009 I just bought one of those that are advertised in the For Sale section, but I'm not sure what buzzer is suitable for it. Does anyone know what/where I can get one from (Maplins?).A linky to the exact thing I need would be excellent please. Les. Solid state 12V buzzer (loud) Assuming the level sensor is normally open (likely), one of these will do, wired 12V (ignition switched line (green)) -> sensor -> buzzer -> earth. IF the sensor goes open circuit when activated, let us know and I'll sketch a circuit wehn I get back from site. HTH Quote Link to comment Share on other sites More sharing options...
Paul Posted June 25, 2009 Share Posted June 25, 2009 Les I'd suggest you use a small standard (normally open) relay to be triggered by the feed from the timer, just to be safe. Use the relay output to operate the buzzer and/or warning light. Something like one of these (30ASPDT): http://www.maplin.co.uk/Module.aspx?ModuleNo=37526 Paul Quote Link to comment Share on other sites More sharing options...
Les Henson Posted June 25, 2009 Author Share Posted June 25, 2009 Lovely - thanks very much chaps Off to Maplins right now. Open circuit, closed circuit ? Sketch me a circuit? no, please, this is rocket science to me Les. Quote Link to comment Share on other sites More sharing options...
Paul Posted June 25, 2009 Share Posted June 25, 2009 Actually Les, if the small buzzer in the link above is all you're going to use, or pehaps just a small LED warning light as well, you can safely dispense with the relay. The buzzer is only 35mA and the timer was built to handle 2A (we did an upgrade on the old version). Hopefully that dodgey Cordell bloke included the wiring diagram with the timer, but if he didn't, we've colour coded the wires all the same: RED - Ignition +ve BLACK - Ground BLUE - Water level switch, Other side of switch to ground WHITE - 12VDC alarm signal to connect to buzzer, light. 2 Amps Max Paul Quote Link to comment Share on other sites More sharing options...
errol209 Posted June 25, 2009 Share Posted June 25, 2009 Actually Les, if the small buzzer in the link above is all you're going to use, or pehaps just a small LED warning light as well, you can safely dispense with the relay. The buzzer is only 35mA and the timer was built to handle 2A (we did an upgrade on the old version).Hopefully that dodgey Cordell bloke included the wiring diagram with the timer, but if he didn't, we've colour coded the wires all the same: RED - Ignition +ve BLACK - Ground BLUE - Water level switch, Other side of switch to ground WHITE - 12VDC alarm signal to connect to buzzer, light. 2 Amps Max Paul Like this then ... Quote Link to comment Share on other sites More sharing options...
white90 Posted June 25, 2009 Share Posted June 25, 2009 Yes he got a diagram. Quote Link to comment Share on other sites More sharing options...
Les Henson Posted June 25, 2009 Author Share Posted June 25, 2009 Yes I got a diagram with it. You don't expect me be able to understand it though do you? Les. Quote Link to comment Share on other sites More sharing options...
errol209 Posted June 25, 2009 Share Posted June 25, 2009 Yes he got a diagram. I don't know, I spend minutes of work's time sketching it up, and he already has one. Never mind STF, RTFI would be closer to the truth ... mutter mutter Back to paid work then . Quote Link to comment Share on other sites More sharing options...
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