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Recent content by gaillimh

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    Monitoring of Inputs/Outputs from Heating Unit Controls

    Hi Thanks again , sorry to be a pain in the ass. 240v direct connected to opto will blow Opto piece though ? From what I've seen I need to bring the voltage down ? All mains will always be off when im working :)
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    Monitoring of Inputs/Outputs from Heating Unit Controls

    Looking at these it doesn't look like I can hook them direct to 240v? Do I need a relay circuit the far side of the opto isolator ? I've never used one and am googling ..
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    Monitoring of Inputs/Outputs from Heating Unit Controls

    Thanks for reply , could you send me a link to an opto coupler that would work, am just not 100% Thanks again !
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    Monitoring of Inputs/Outputs from Heating Unit Controls

    Will take a look at that, cheers! But how do I safely monitor the mains? Thats my core issue :)
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    Monitoring of Inputs/Outputs from Heating Unit Controls

    Hi Tpetar - good to see you again. Can you shed more light on 1-Wire? I found a 1 Wire temperature sensor Googling - One Wire Digital Temperature Sensor - DS18B20 - SparkFun Electronics but am not sure how I can use ? The sensors are already in place and info displayed on Controller on heating...
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    Beacon lights on R/C truck project

    Hi , Im no expert at all so ignore my comment if not useful... :) Depending on the size of the light bulbs you could replace with LED's ( and a resistor of proper value ) and then you would have no prob with smaller supply? Cheers Stephen
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    Monitoring of Inputs/Outputs from Heating Unit Controls

    Hi , hope this find you well. I have a Heating Unit in my Garage that is controlled electronically. There are multiple Inputs/Outputs that I would like to "piggyback" and monitor. I *obviously* want to do this safely as Mains Electricity is involved. Inputs include Temperature of various...
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    Normally Open Garage Door Sensor - Need Normally Closed. How to "convert" ?

    Re: Normally Open Garage Door Sensor - Need Normally Closed. How to "convert" ? Hi Kak , v v interesting and great graphics - I hadnt seen this post. Changing the reed might be the simplest idea completely.. Im a bit wary of diving into opto isolators etc for now :) Thanks again to Kak and...
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    Normally Open Garage Door Sensor - Need Normally Closed. How to "convert" ?

    Re: Normally Open Garage Door Sensor - Need Normally Closed. How to "convert" ? Thank you for your images , I have added my own here to further ensure I have understood your diagram , because you have 3 scenarios and want to be sure I understand. Firstly , when the door is closed , the Switch...
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    Normally Open Garage Door Sensor - Need Normally Closed. How to "convert" ?

    Re: Normally Open Garage Door Sensor - Need Normally Closed. How to "convert" ? Hi , Thank you for responses. because there is no power used with garage door Im a little confused as to how it fits together in this case kak111? Have you a suggestion on relay I could use? @tpetar - using the...
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    Normally Open Garage Door Sensor - Need Normally Closed. How to "convert" ?

    Hi I have found this thread previously which mentions the above but is a little different so please excuse mods if this seems like duplication. I have a Wireless Magnetic Switch on my Garage Door - this comms with my alarm system. The Wireless Mag can take an external input from NC sensor...
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