Hi,
Power line fluctuation is very common in my country, so was looking to build a Hi/low cutoff circuit for my power inverter which do not have one.
I hv found this circuit that looks nice,
http://www.free-circuits.com/circui.../high-and-low-voltage-cut-off-with-time-delay
or
http://www.elecpod.com/powerinverter/2010/06243261.html
I hv built some circuit before and can breadboard one if needed. But the one I'm interested in uses LM741 op-amp, but I got one LM393(comparator) available with me, so can someone please help me convert above circuit to use LM393(Comparator) Instead of LM741 op-amp.
I have already got the linear supply as was in above circuit detail. I was hoping to simplify the circuit with a single ic LM393 Instead of two 741's.
Also, I cannot find SL100 NPN transistor, But got some 2n2222a and BC547's, will they work instead of sl100 ?
Please help me build this circuit, as I need the inverter and hi/low protection for it, in fact writing this without line power i.e. backup power from the inverter.
My power line 230VAC 50 Hz
I have got one more question, How to protect the power supply circuit and transformer when the power line goes beyond 270(some times it does) any ideas ?? ....
I have also got some quad comparators HA17339, which I believe are equivalent to LM339. hOPE can someone help me in this regard...
Power line fluctuation is very common in my country, so was looking to build a Hi/low cutoff circuit for my power inverter which do not have one.
I hv found this circuit that looks nice,
http://www.free-circuits.com/circui.../high-and-low-voltage-cut-off-with-time-delay
or
http://www.elecpod.com/powerinverter/2010/06243261.html
I hv built some circuit before and can breadboard one if needed. But the one I'm interested in uses LM741 op-amp, but I got one LM393(comparator) available with me, so can someone please help me convert above circuit to use LM393(Comparator) Instead of LM741 op-amp.
I have already got the linear supply as was in above circuit detail. I was hoping to simplify the circuit with a single ic LM393 Instead of two 741's.
Also, I cannot find SL100 NPN transistor, But got some 2n2222a and BC547's, will they work instead of sl100 ?
Please help me build this circuit, as I need the inverter and hi/low protection for it, in fact writing this without line power i.e. backup power from the inverter.
My power line 230VAC 50 Hz
I have got one more question, How to protect the power supply circuit and transformer when the power line goes beyond 270(some times it does) any ideas ?? ....
I have also got some quad comparators HA17339, which I believe are equivalent to LM339. hOPE can someone help me in this regard...