mohammed_senior Posted March 3, 2006 Report Share Posted March 3, 2006 i am working with 8051 microcontroller and i need to connect a device with it, this device is 12 volts so i need a good relay, so what type of relay i need and how can i interface it to the 8051 system Quote Link to comment Share on other sites More sharing options...
prateeksikka Posted March 5, 2006 Report Share Posted March 5, 2006 i use the ones locally made in india here as far as such components are concerned.except for the ICs and intelligent chips ,i dont think it makes much difference.... Quote Link to comment Share on other sites More sharing options...
waferstar Posted March 10, 2006 Report Share Posted March 10, 2006 We don't know what is exactly you want to know .If your 8051 system want to connect with the 12V system,you should use the 12V power supply and the low down the Voltage to 5V for 8051 system.and you the relay is used in the 8051 system,you can select the 5V relay or 12V relay ,that is depended on what you want .================================1.Extract the code for you from programed Mcu for legal use2.Specilized in the Microwave sensor,automatic door sensor,infrared sensor3.OEM PCB and design for you in Chinawww.wafersensor.com[email protected] Quote Link to comment Share on other sites More sharing options...
nikhil arora Posted March 11, 2006 Report Share Posted March 11, 2006 how much curret ur 12v device uses if it is using less current (<500mA)then u can use ULN2003 to control that deviceit is very easy to use with controller.if it is less then 1A then u can connect two or three ouput of uln2003 for more current.Solid state switch are better than relay for lesser current. Quote Link to comment Share on other sites More sharing options...
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