Lm358 Low Voltage Cutoff Circuit

O p voltage swing is large.

Lm358 low voltage cutoff circuit.

In a printed circuit board operating in a still air ambient. 3 tested 220v high and low voltage cut off circuits using ic 324 and transistors. May be i connect something wrong. The lm258 lm258aand lm158 lm158acan be derated based on a 150 c maximum junction temperature.

Hi swagatam i have made schematic in multisim and simulate it but it cannot simulate as i intend. In high and low voltage protection circuit we have used an lm358 op amp which has two outputs connected to 2 and 3 number pins of pic microcontroller. But you need to change a photo diode and the photo transistor in place. The dissipation is the total of both amplifiers use external resistors where possible to allow the amplifier to saturate or to reduce the power which is dissipated.

Sensing voltage derived through the 10 k pre set is given to the non inverting ve terminal and this sets the high level cut. When the input dc from the sensor is less than zener voltage the output of the op amp is low and vice versa. The power supply voltage and differential i p voltages are similar. When the input voltage goes high then the relay will be activated and also when the input voltage is below then required level then relay activated.

You can use both ln324 or lm358 but i have shown lm358 in the diagram. This voltage sensor circuit can be used to protects any appliance to voltage fluctuation. And a voltage divider is used to divide voltage and connects its output at 4th number pin of pic microcontroller. Over voltage and under voltage protection circuit for high and low voltage cutoff.