charger electronic circuit board

electronics gadget green machine multimedia toy signage light number lighting simple voltage regulator circuit board volts adapter powered 7805 current-regulator battery-charger charger dc-line logic-assessment ac-noise drop-out-voltage energy amplifier power-supply work printed circuit-board pcb output-current transformer cable fix service component equipment industrial-electronic semiconductor fet mosfet thyristor engineer technician device background hardware engineering technology electronic five-volts 5-volt ac-dc voltage-range voltage-regulators integrated-circuit capacitor direct-current resistor bridge-diode diode transistor vintage electric