Discussion in "Project Addition or Changes" started by    Arpit    Nov 15, 2006.
Wed Nov 15 2006, 04:26 PM
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.

 tienduhieu like this.
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Thu Nov 16 2006, 11:07 AM
do u want just the switching or something else too?
 tienduhieu like this.
Thu Nov 16 2006, 11:12 AM
i wanna have just switching on & off the heater using these thyristors.

 tienduhieu like this.
Thu Nov 16 2006, 11:29 AM
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.
 tienduhieu like this.
Wed Jun 20 2007, 01:47 PM
yes this can be done by using a single relay only ..no need to use SCR
 tienduhieu like this.
Wed Jun 20 2007, 05:30 PM
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..
 tienduhieu like this.

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