![]() ![]() ![]() First connect pin #1 (3v3) to the positive rail on the breadboard.In the following steps I am referring to the physical numbers of the pins (Logical order). To get the light sensor circuit built correctly follow the steps below or check out the circuit diagram right underneath the steps. Using this in series with the LDR we can work out how much resistance the LDR is giving out thus whether it is light or dark. A capacitor essentially acts like a battery charging up whilst receiving power and then discharging when no longer receiving power. ![]() The capacitor in our circuit is there so we’re able to measure the resistance of the LDR sensor. In the light this sensor will have a resistance of only a few hundred ohms whilst in the dark it can have a resistance of several megohms. Without it we wouldn’t able to detect whether it is dark or light. The light dependent resistor or also known as the LDR sensor is the most important piece of equipment in our circuit (obviously). The circuit we are going to make for this tutorial is super simple and is great for anyone who is just starting out with circuitry. ![]()
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