This is a complete circuit of power supply that is produces a 5 VDC voltage. This circuit is rechargeable battery using solar panel. The solar panel charges the battery when sunlight is bright enough to produce a voltage above 1.9v. A diode is required between the panel and the battery as it leaks about 1mA from the battery when it is not illuminated. This is the figure of the circuit.
How is the power supply work? The regulator transistor is designed to limit the output voltage to 5v. This voltage will be maintained over the capability of the circuit, which is about 10mA. The oscillator transistor must be a high-current type as is turned on for a very short period of time to saturate the core of the transformer. This energy is then released as a high-voltage pulse. The circuit operates at approx 50 KHz and the pulses quickly charge the electrolytic.
How is the power supply work? The regulator transistor is designed to limit the output voltage to 5v. This voltage will be maintained over the capability of the circuit, which is about 10mA. The oscillator transistor must be a high-current type as is turned on for a very short period of time to saturate the core of the transformer. This energy is then released as a high-voltage pulse. The circuit operates at approx 50 KHz and the pulses quickly charge the electrolytic.
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