May, 2016 | Code Bank

WS2811, WS2812, NeoPixel RGB Pixels/LEDs and Arduino

WS2811 or WS2812 based LEDs / RGB pixels are cheap and easily available on the online stores. They run off 5 volts and can be addressed individually. Waterproof versions are also available. On Ebay/Aliexpress/Alibaba they are sold as a set of 25 leds / RGB pixels connected together. Multiple such strips/chains can be connected together… Continue reading WS2811, WS2812, NeoPixel RGB Pixels/LEDs and Arduino

LM35 Precision Cheap Temperature Sensor

The LM35 from Texas Instruments is a cheap but very good temperature sensor. It is available in various packages. Please refer to the LM35 Temperature Sensor for package and other details. It can be powered directly from the 5v supply of Arduino. The chip outputs 10.0 mV per °C. Below is a small snippet of… Continue reading LM35 Precision Cheap Temperature Sensor

Logic voltage levels

Technology L voltage H voltage Notes CMOS 0 V to 1/3 VDD 2/3 VDD to VDD VDD = supply voltage TTL 0 V to 0.8 V 2 V to VCC VCC = 5 V ±10%