This is a power-saving lighting that uses solar energy storage lighting to convert solar energy into electrical energy and store it in the battery. The lamp can be used in an energy efficient manner, which is beneficial to the full utilization of solar energy.
The circuit is shown in Figure 27.9. Ep is a solar cell. Es is a battery pack. K is the lighting power switch. 555 constitutes a multi-resonant swash circuit, generating alternating current for efficient energy-saving lamp lighting. YU is a high-efficiency energy-saving lamp.
When there is sunlight in the daytime, Ep turns the illuminating sun into a photocurrent, and charges the E5 through the diode 1N4002 to store energy.
When illumination is required, the switch K is closed and the 555 is continuously oscillated. The oscillating signal is boosted by the transformer, and the secondary high frequency current is applied to cause the lamp to illuminate.
The step-up transformer can adopt GH26 can core, the primary is wrapped with an enameled wire of 0.5mm or more and wound around 15åŒ, and the secondary is wound with an enamelled wire of about 0.3mm.
Power tube BG requires a withstand voltage greater than 50V and a current rating of 3A or higher. For example, BDX94 or CDX94 (90V, 12A), CD77-1B (100V, 5V).
The circuit is shown in Figure 27.9. Ep is a solar cell. Es is a battery pack. K is the lighting power switch. 555 constitutes a multi-resonant swash circuit, generating alternating current for efficient energy-saving lamp lighting. YU is a high-efficiency energy-saving lamp.
When there is sunlight in the daytime, Ep turns the illuminating sun into a photocurrent, and charges the E5 through the diode 1N4002 to store energy.
When illumination is required, the switch K is closed and the 555 is continuously oscillated. The oscillating signal is boosted by the transformer, and the secondary high frequency current is applied to cause the lamp to illuminate.
The step-up transformer can adopt GH26 can core, the primary is wrapped with an enameled wire of 0.5mm or more and wound around 15åŒ, and the secondary is wound with an enamelled wire of about 0.3mm.
Power tube BG requires a withstand voltage greater than 50V and a current rating of 3A or higher. For example, BDX94 or CDX94 (90V, 12A), CD77-1B (100V, 5V).
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