These diodes are widely used in SMPSs, reverse battery protection, converters, and more. A very basic rectifier circuit consists of four diodes here we will be using MBR20100 Schottky diodes. So, our rectifier circuit converts our 40V AC to DC to get us close to the format of output we need. ![]() Designing the Rectifier CircuitĪ rectifier circuit converts AC voltage to DC. So we will use a transformer with a primary-to-secondary turns ratio of 4.107, which will be able to supply 40V AC and max 15A to each of the secondary control circuits. Our power supply output is 30V DC and -30V DC symmetrically, max 10A both. Our very first step to building this power supply is choosing a transformer. Transformer (Primary to Secondary turns ratio 4.107).Required Hardware Transformer and Rectifier Circuit Further voltage adjustments require additional voltage regulators and potentiometers.įirst, we will begin by stepping down voltage from mains and converting it to DC voltage via a rectifier circuit. The output of the circuit will be +30VDC and -30VDC. On the Arduino UNO board, digital pins 3, 5, 6, 9, 10, and 11 are PWM pins. Most importantly they are used to provide an analog output, providing an analog voltage between 0% and 100% if the digital output is filtered. PWM pins are used in many applications, including dimming an LED, providing variable speed control for motors, and more. ![]() ![]() Pulse width modulation (PWM) is a common technique used to vary the width of pulses in a train of pulses. In order to use an Arduino in this task, we can use PWM outputs of the board to control the output voltage.
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