Part number : YX801
Functions : Solar LED drive
Package information : TO-94 4Pin Type
YX801 : The two 1.25V charge current or one Lights in a stable manner LED in the pond. Light of the sun Saw And to charge the rechargeable battery and a battery hit the error, The point the LED in the charging battery is charged to at night Light, automatic switching.
Pin 1 attached to the solar panel +ve
Pin 2 attached to the solar panel -ve
Pin 3 attached to battery -ve and one leg of the LED
Pin 4 attahed to battery +ve via the other leg of the LED and a resistor.
YX801 datasheet refer to YX8018 datasheet