Today we will as push button switch as toggle switch. When we press the button “on” it will store status “on” hold, although, we will release. Then, we press it again it will “off” and store status “off” as well. How it works and building We want to control LED ON-OFF by button (as toggle switch). So we use schematic as Figure 1 Figure 1 Schematic diagram of The Button become Toggle Switch using Arduino Parts will you needs •Arduino UNO R3 •Normally open pushbutton •one LED •10K resistor •470 ohns resistor •jumper wires •Breadboard Then, we connect parts on …
This is first tiny emergency light of my son. It is very small, use LED display when power outage,use transistor instead relay use AA battery charger. How it works As Figure 1; Tiny emergency Light circuit use a few parts include the two AA nickel-metal hydride batteries, for store enough energy to drive a small lamp. Figure 1 The tiny emergency light circuit It works like the general emergency light; it fixtures are used to automatically provide lighting in the event of a power outage. 1. The charger section electrical energy storage in normal conditions. 2. The controller to drive …