Texas Instruments TL494 Pulse-Width-Modulation Controller IC 4.8mm Green Color LED It's a 3v 560mAh Lithium

It's a 3v 560mAh Lithium coin cell Battery

Spring action

This switch is designed to be conveniently mounted on printed circuit boards to provide various ranges of input to the electronic device

surface mount SOIC8 package

Texas Instruments TL494 Pulse-Width-Modulation Controller IC 4.8mm Green Color LED It's a 3v 560mAh LithiumThe TL494 incorporates on a single monolithic chip all the functions required in the construction of a pulse width modulation control circuit The TL494 has an on chip 5 volt regulator, two error amplifiers, an adjustable oscillator, a dead time control comparator, a pulse steering flip flop, and output control circuitry. It was primarily created for power supply regulation. Either a common emitter or an emitter follower output capability is offered by