fish2005 Posted October 21, 2005 Report Share Posted October 21, 2005 Thank you guys for your answers. From youre debate I understand some important things.1. A DC power supply is fine for this job. This is verry good because I can use my 12VAC transformer whith a voltage regulator and a NPN current booster. If i use a ajustable voltage regulator, the problem of dimming is resolved. Please corect me if I am wrong.Question: In my knowlege, 24VDC is not equivalent whith 24VAC. What is the equivalent DC power for my iron specification.2. This thread is a backup solution because I dont know if my project for a temperature controller will be a succes. This is my first major project. I orderred (today or tomorrow is delivery)this iron. This tipe of iron (24VAC, 48W, 2A) is sell as a spare part for a astronomical priced soldering station and have an integrated thermocouple. I intend to make a controller whith UAA1016 and a triac for this iron and save money.In UAA2016 datasheet is a simple circuit for this, but this circuit is designed for NTC tipe sensor. http://www.onsemi.com/pub/Collateral/UAA2016-D.PDFI find on net this circuits related to a homemade soldering station:This is the tested schematic for a NTC tipe sensor:http://tinypic.com/view/?pic=ekm6mvAnd this is the adaptation for a K thermocouple tipe iron made by same person and tested whith succes by others:http://tinypic.com/view/?pic=ekm6o4My schematic is the combination of these...but I'm not sure if everything is correct conected. If you guys wiew any errors please corect me. I repeat: this is my first major electronic project.I dont know the wattage for resistors. This iron comes in 2 diferent models, whith 2 specification for K thermocouple (7-8 mV at soldering themperature and 20-25 mV) , so require an adaptation of opamp resistors.So guys, if enybody is interested or want to help a novice.... Quote Link to comment Share on other sites More sharing options...
Guest Alun Posted October 21, 2005 Report Share Posted October 21, 2005 Don't double post, it won't increase your chances of a response, it'll only confuse and possibly annoy people thus reducing your chances of a helpful reply. Quote Link to comment Share on other sites More sharing options...
fish2005 Posted October 21, 2005 Author Report Share Posted October 21, 2005 Sorry!I double post because the subject was changed. Quote Link to comment Share on other sites More sharing options...
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