The figure shows the LM723 voltage regulator-based power supply, the purpose of the MOSFET is to provide a high current boost. NOTE: The gate voltage need to trigger the MOSFET is 10v with a 1A current LM723 MOSFET power supply LM723 MOSFET power supply The BC547 transistor and resistor are for protecting the short circuit. The current boosting is the duty of the MOSFET in this circuit, the resistor adjusts to the MOSFET will provide gate voltage to trigger the MOSFET. LM317 constant current source is one of the simplest design.Its really simple, you can build the circuit on a bread board or just by soldering components to each other.But that will add another voltage drop of around 0.7 V to 1 V, so I excluded it.But you cant find a 12.5 Ohm, 6.25 Ohm or 1.25 Ohm resistor for 100 mA, 200 mA and 1 Amp current respectively. The circuit shows the power supply using LM317 and MOSFET, the LM317 is the most popular voltage regulator IC which can have a voltage range of (0 to 24v) and a current limit of (1.5A). LM317 MOSFET power supply LM317 MOSFET power supply Multiple conversion circuit sections are been used mostly on the switched-mode power supplies and at Arduino projects, so the power generation from the pulsed signal is the main purpose of the MOSFET power supply. The PWM MOSFET power supply setup is used to convert the pulsed signal from the PWM section into a voltage output.
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