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ndgcpr Forums Junkie Location: Pine Rivers QLD Registered: April 2005	Re: Who can help with building a temp gauge? Tue, 03 May 2005 11:50 OK here we go. You can buy dual temp sensors from jaycar. the are fairly cheap too. pull it apart and there will be two sections on one end. one will have "out" written on it the other "in". these are the two senders. the "out" one will have two wires that run to the "probe". the other will most probably have a little Green thing about 1-2mm long and 1mm wide. I hope you can solder SMD. Unsolder it and solder on some wire (the better quality the less voltage drop and thus the more accuracy) then re solder the green thing on the end. pull apart the probe and you will find much the same thing. unsolder it and solder new wires on it. put the two probes in the same place and hopefully the will read around the same temp. it all depends on how accurate you want it. Now to start from scratch. i would use some NTC thermistor's. this will pretty much tell you how to use them: http://www.ecircuitcenter.com/Circuits/therm_ckt1/ therm_ckt1.htm You can run a simple resistor divider as shown but it will give a exponential response. it is best to use a constant current circuit. he is a circuit diagram you should be able to run the thermistor where the LEDs are and just measure the voltage drop across it: http://7wells.tripod.com/caving/rayovac_mod/const_ current_circuit.html i hope this is what you were after. if you want info on running LCD's i will post another long speel if you want [Updated on: Tue, 03 May 2005 11:52] [Report message to a moderator]

	Subject	Poster	Date
	Who can help with building a temp gauge?	clubagreenie	Tue, 03 May 2005 04:55
	Re: Who can help with building a temp gauge?	EnFlaMEd	Tue, 03 May 2005 10:35
	Re: Who can help with building a temp gauge?	ndgcpr	Tue, 03 May 2005 11:50
	Re: Who can help with building a temp gauge?	Toobs	Wed, 04 May 2005 04:34
	Re: Who can help with building a temp gauge?	clubagreenie	Wed, 04 May 2005 09:13
	Re: Who can help with building a temp gauge?	wilbo666	Wed, 04 May 2005 11:15
	Re: Who can help with building a temp gauge?	Cool1	Wed, 04 May 2005 10:38
	Re: Who can help with building a temp gauge?	river	Wed, 04 May 2005 11:27
	Re: Who can help with building a temp gauge?	river	Wed, 04 May 2005 11:45
	Re: Who can help with building a temp gauge?	clubagreenie	Wed, 04 May 2005 12:46
	Re: Who can help with building a temp gauge?	river	Wed, 04 May 2005 22:44
	Re: Who can help with building a temp gauge?	ndgcpr	Thu, 05 May 2005 01:49

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