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IR2111 H-Bridge Inverter Circuit with Soft Start

Last Updated on September 14, 2025 by Swagatam 4 Comments

Here we see this circuit diagram which is full H-Bridge using 4 power MOSFETs and 2 IR2111 high side driver ICs. That means this circuit is for making full bridge inverter which converts DC into AC. Power Supply Part We have +600V DC at top rail, written as +600V max. And ground (0V) at bottom. […]

Filed Under: Inverter Circuits Tagged With: Bridge, Inverter, IR2111, Soft, Start

Soft-Start Power Supply for Amplifier Loudspeakers

Last Updated on May 5, 2022 by Swagatam 9 Comments

amp power supply slow start

The proposed slow-start power supply circuit is specially designed for power amplifiers to ensure that the loudspeaker connected with the amplifier do not generate the loud and unwanted “thump” sound during power switch ON. This also implies that the power supply will safeguard or protect the loudspeaker from the sudden inrush current transient from the […]

Filed Under: Power Supply Circuits Tagged With: Amplifier, Loudspeakers, Power, Soft, Start, Supply

PWM Motor Soft Start Circuit to Prevent High Consumption during Power Switch ON

Last Updated on June 30, 2026 by Swagatam 224 Comments

triacpwmdriver

In this post I have explained an effective PWM motor soft start circuit which can be used for enabling heavy motors with a soft start and thus prevent the equipment from drawing dangerous high currents. Why a Soft Start High wattage motors such pump motors or other forms of heavy industrial motors tend to draw […]

Filed Under: Motor Controller Tagged With: High, Motor, Prevent, PWM, Soft, Start

Refrigerator Motor Soft Start Circuit

Last Updated on June 30, 2026 by Swagatam 26 Comments

refrigerator soft start circuit

Refrigerators tend to draw appreciable amounts of current each time their compressor switch ON, and this could happen many times per day. A soft start circuit to the compressor motor could probably tackle this issue and help save electricity. The idea was requested by Mr. Naeem Khan. Technical Specifications I need your help regarding to […]

Filed Under: Motor Controller Tagged With: Motor, Refrigerator, Soft, Start

Adding a Soft Start to Water Pump Motors – Reducing Relay Burning Problems

Last Updated on August 8, 2026 by Swagatam 142 Comments

In this post I have explained a few innovating and simple soft start circuit examples which may be implemented with heavy duty motors so that they are able to initiate with a soft start or a slow sluggish start instead of a sudden, bumpy start Why Soft Start is Crucial for Heavy Motors When heavy […]

Filed Under: Water Controller Tagged With: Adding, Motors, Pump, Soft, Start, Water

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