As long as you have 12V power supply, do not install the battery after the circuit is connected, adjust the adjustable resistor in the lower right corner to make the battery output terminal 4.2V, and then adjust the adjustable resistor in the lower left corner to make the LM358 third pin 0.16V. It can be, the charging current is 380mA, super fast, three parallel diodes are step-down, to prevent LM317 overheating, and the LM317 must be equipped with a heat sink. The triode in the figure can be any type.
The figure below shows another charging circuit diagram:
Ultra Plantâ„¢ Grow Light offers One Chip Technology aimed to meet your indoor growing expectation such as improve plants' quality, increase yield, or better the margin, etc., all for helping you realize a higher return on your crops.
Ultra Plantâ„¢ Grow Light is combined our advanced All-In-One technology with patented optical design and customized light full spectrum supported from our experienced LED engineers, plant specialists and other partners working on horticulture.
From Ultra Plantâ„¢ APP, you are able to schedule the growing process including photoperiod, brightness and spectral in advance. The lighting system will help you grow smarter, easier and better.
Ultra Plantâ„¢ is the most versatile horticultural grow lighting fixture for indoor plants with flexible full spectrum, brightness control and uniform, wider light distribution, suitable for top lighting of all types of crops. No matter it applies to anywhere for any crop, Ultra Plantâ„¢ can do perfect work for you.
Grow Light On Fruiting,Grow Light Fruiting,Fruiting Grow Lights,Bset Grow Light On Fruiting
Feton Corporation , https://www.fetonledlight.com