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CONTROLLING A 100W HEATER using AT89C51.
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Arpit
Wed Nov 15 2006, 08:26AM

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Please check the circuit for CONTROLLING A 100W HEATER using AT89C51.
its a 100 watt heater i want to controll using pwm of AT89C51 (pins T0, T1).
the SCRs used are 2P4M.
check out it and reply please.

the circuits are attached.
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Ajay
Thu Nov 16 2006, 03:07AM
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do u want just the switching or something else too?
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Arpit
Thu Nov 16 2006, 03:12AM

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i wanna have just switching on & off the heater using these thyristors.
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Ajay
Thu Nov 16 2006, 03:29AM
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u can do that with a relay will be easy.. i think...
connect the heater plug to the relay. and switch using controller. that easier i think.
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Ritesh
Wed Jun 20 2007, 06:47AM
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yes this can be done by using a single relay only ..no need to use SCR
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Ajay
Wed Jun 20 2007, 10:30AM
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well.. i got a better idea.. you need not to switch on/off the SCR, better is.. simply control the gate voltage and the o/p voltage automatically gets controlled. and for this purpose use an optocoupler to connect the SCR. this is the easiest way..
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