70x70mm Square Solar Panel L7805CD2T IC 5V These are Carbon Film Resistor

These are Carbon Film Resistor with a value of 68k ohm 1/2W and tolerance of ±5%

without relay or solid state relay

It's a 8x4 Inches General Purpose Printed Circuit Zero Board

This is a unidirectional electret microphone with high sensitivity

70x70mm Square Solar Panel L7805CD2T IC 5V These are Carbon Film ResistorIt's a Square Solar Panel. Solar technologies convert sunlight into electrical energy either through photovoltaic (PV) panels or through mirrors that concentrate solar radiation. This energy can be used to generate electricity or be stored in batteries or thermal storage. This is a compact Mini Solar panel. You can use this mini solar panel in your DIY projects for charging batteries and portable electronic devices. Features : It's a Rectangle solar