Tilt ball switch are small and cheap electronic sensors able to detect inclination. While not being as accurate like accelerometers, they are small, inexpensive and easy to use. For this reason tilt ball switches are popular for toys and gadgets. Tilt ball switch are usually made of an internal cavity with a free conductive mass […]
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Active buzzer is a cheap electronic component able to produce a sound when powered with a DC current. Differently from passive buzzer, this element includes a built-in oscillator. This allow user to make it working by powering on and without the need to simulate an electronic square wave. It includes 2 rear pins. The longer
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Passive buzzer is a cheap and simple DC powered element able to generate a multi tone sound if triggered with low voltage current. Passive buzzer differs from active buzzer because active one has an internal oscillator able to generate sound when simply activated with a continuous trigger. Passive buzzer, instead, needs a square wave trigger
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A photoresistor (also known as photocell) is a Light Dependent Resistor (LDR). As the name suggests, these components act just like a resistor, changing their resistance in response to how much light is falling on it. Usually, photoresistors have a very high resistance in near darkness and very low resistance in bright light. This component
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Infrared sensors are really common to devices which need to be controlled from a remote within reduced distances. Typical applications are in remoting TV, media center, robots, air conditioning systems, etc. With the growth of mass production, their prices have plummeted and can be found on e-commerce websites. Linux systems have a spread package called
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Ultrasonic Sensors are great for all kind of projects that need distance measurements, avoiding obstacles as example. The HC-SR04 is inexpensive and easy to use and can be easily connected with a Raspberry PI Ultrasonic sensor module HC-SR04 provides 2cm-400cm non-contact measurement function, the ranging accuracy can reach to 3mm. The basic principle of work:
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4 Digit 7 Segment Display is a simple electronic display, similar to Single 7 segment display, but composed of 4 digits than can show at the same time 4 chars. It also has dot leds, but in different confiurations (single for each digit, central colon, etc). 4 digit 7 segment display is widely known and
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In this tutorial, I’m going to show you how to connect and configure a 7-segment display with a Raspberry PI. If you are searching for “4 digit-7 segment display” guide, you may be interested in my 4 Digit diplay tutorial. A 7-segment display is a simple electronic display composed of 7 (surprise) LEDs. It is
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