Here is a great collection of touch switch circuits. A touch switch is an electronic device that enables us to control a circuit by simply touching a sensor. Simple touch switch circuit with 4011 – ...

The circuit below shows a simple application of ldr operated switch. This circuit senses the ambience light and depending on the presence/absense of sufficient ambience light, it turnes the bulb ...

You can connect multiple LEDs to one battery in two different ways. The one in this picture is called a 'series circuit'. The other is called a 'parallel circuit'. The two LEDs in this picture are ...

Learn how to use LED circuits in your STEM projects with these four creative ideas. Make LED greeting cards, wearables, sensors, or games with simple materials and tools.

1. Gather your kit You'll need LEDs for surface-mount technology -- the small components you see on circuit boards -- to lie flat against your page. And get a power supply too: "Coin cell ...

Print News in Science Play dough circuits 2: experiment with electricity Last time, we went through the basics of how to make simple electrical circuits with play dough and light-emitting diodes ...