At the instant of switching on, the voltage at point B is divided by the resistor to obtain VB=8.3V. Since the voltage at the C terminal of the capacitor cannot be abrupt, at this time, the voltage at point A Va=0, the output level of the operational amplifier 4a is about 12V, and the voltage is passed through the Rll pair capacitor. C is charged. When Va rises above Vg, the output of the op amp 4b is inverted from low level to high level. However, the output of the op amp 3b is still low, so the LED 6 is illuminated. At this time, the capacitor C continues to be charged. When Va rises above Vf, the operational amplifier 3b also reverses to a high level, and the light-emitting M-tube MDS is lit, but since the output terminals of the 4b and 3b are both high, Therefore, the light-emitting M-tube LED6 is turned off. The principle is analogous.
Grandwatt Solar& Hybrid Products include Solar Light Tower, Hybrid Light Tower, Mobile Surveillance Tower and Solar generator unit.
Solar light tower
is efficient and delivers high performance light tower, giving workers good
visibility while allowing sites to increase sustainability with zero COâ‚‚ emissions
and zero noise, zero operating costs (diesel fuel, maintenance, labor), it is
100% renewable energy, stronger structure can load more power solar panels and
batteries, patented rotating mechanism can adjust angle of solar panel to best
align with the sun's location to achieve maximum solar yield.
Hybrid light tower
is an advanced lighting tower, it can save 40% fuel, save maintenance, save
labor. It operates from the latest solar and battery combination, backed up by
a small fuel-efficient diesel engine. Utilizing latest, hybrid technology,
provide less consumed power than traditional towers for huge fuel savings and
reduced COâ‚‚ output.
Mobile Surveillance Tower is a solar tower with camera, with zero COâ‚‚ emissions and zero noise, zero operating costs, it is powered by 2*200 Ah Lithium battery and 2*455 W Mono, it can last above 55 hours.
Trailer Mobile Light Tower,Solar Lighting Tower
Grandwatt Electric Corp. , https://www.grandwattelectric.com