PolaPi: A Pi Zero based instant point, shoot, and print camera

PolaPi Zero: A Raspberry Pi Zero powered instant camera

Even in today’s age of smartphones, polaroid cameras are still very popular because it not only allows you to capture the moments instantly, but also let you hold the printed picture immediately after taking the shot. Muth’s PolaPi is a Raspberry Pi Zero powered DIY instant camera that can point, shoot, and print the pictures on thermal papers. It uses a Sharp memory LCD for ‘live-view’ (and for review after taking shots) and the Nano thermal printer from Adafruit for printing monochrome images. Camera demo is shown in the following video.

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Arduino powered mini conveyor belt for training purpose

Arduino powered mini conveyor belt

Belt conveyors are key components of industrial automation systems. This modular mini conveyor belt is designed to replicate a miniature version of an industrial automation process that can be used in educational environments for industrial automation illustration using microcontrollers. It consists of a speed controller to drive a stepper motor with up to 2 Amps, and an Arduino board for automating tasks. The speed can be varied from 0 to 300 RPM, and is displayed on a 3-digit seven segment display module. The design was conceived to have the least amount of complex mechanical elements as possible, however, two special non trivial steps

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Automatic candy sorter

Arduino candy sorter

Built by Willem Pennings from the Netherlands, this color candy sorting machine is robust and beautifully designed. It uses an Arduino controller, stepper motors, an RGB color sensor and several 3D-printed parts to perform sorting of colorful candies like M&M and Skittles. It can sort a 300 gram bag of mixed M&M in approximately 2-3 minutes. Posted below is a video showing the machine in action. The machine is able to sort M&M’s and Skittles by colour by performing optical measurements using the RGB sensor. It can be modified to sort any type of coloured object, as long as the individual pieces

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Tutorial 8: ESP8266 Internet clock

ESP8266 Internet Clock

The National Institute of Standards and Technology (NIST) provides official time in the United States. NIST disseminates the time using several methods, including radio broadcasting over short-wave and long-wave frequencies, telephone dial-in services (ACTS), and Network Time Service (NTS) over the internet. This tutorial describes how to build an ESP8266-based internet clock that uses NIST’s NTS service to retrieve accurate time information. The time is displayed on a colorful TFT LCD (ILI9341 driven) in both analog clock dial and digital formats. The time is synchronized to the NIST server in every 2-minute interval. Hardware This project uses an ESP8266 module to connect to

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Tutorial 7: ESP8266 and ILI9341 TFT LCD

Rainbow colors demo

In tutorial 3, we discussed how to use an SSD1306-driven I2C OLED screen with EasyESP-1 for displaying basic text and graphics. We used a 0.96″ (along the diagonal) 128×64 monochrome pixels OLED display for illustration. Despite its small size, the readability was pretty good due to its high contrast, which makes it a very good, compact size display for general applications. The excitement of having a display screen in an ESP8266 project can be further enhanced by upgrading the choice of display to colorful TFT LCD. One such screen that is readily available in the market at affordable price is ILI9341

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