Author: Maker

Big Rob – Raspberry Pi robot Peak Power Pack power supply

Big Rob is a very hungry robot. As you see with his big mouth he needs a lot of energy. To fulfill his need for energy I had to find a good solution for the robot. At the end I decided to buy a “Victron Energy – Peak Power Pack”. The power pack has 384 Wh, 12V and 30 Ah. I would say that is enough power for a ride in the garden. Heavy lead acid batteries as normally used in cars are too big and well too heavy. I decided to buy solution with Lithium-Ionen technology which could...

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Raspberry Pi – MCP23017 bi-directional 16-Bit I/O Expander with I2C Bus

For a long time I was searching for a cheap and easy to use module to expand the I/O interface of the Raspberry Pi. Important for me is that the module is supported by a Python library which makes the usage very comfortable and easy. The MCP23017 chip supports the I2C interface which could be used by the Raspberry Pi for communication. Adafruit developed a Python library which could be used together with MCP23017 chip. This library makes it very easy to use the additional I/O ports from the MCP23017. This library makes the MCP23017 chip soldered on a...

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Big Rob – Raspberry Pi robot with nice teeth

The idea was to build a big robot for outdoor usage. The robot uses a Raspberry Pi Computer as brain. The design of the robot is modular. This design concepts makes it possible to add for example some boxes on top of the robot. This additional boxes could be used as cases for additional electronic components like a NVIDIA Jetson TX1 board and sensors. But this post is about the teeth I build for my robot as a show case. The next chapter is about how I build the moth and teeth for my robot. I cut pieces out...

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Big Rob – Raspberry Pi Roboter with differential GPS

The Big Rob robot is not yet finished. I have to work on the look of the robot. But the electronic components are already installed in the robot. The brain of the robot is a Raspberry Pi 2 Model B. The Raspberry Pi is connected to a RasPiGNSS module to receive the raw GPS data stream. To control the robot via WIFI the Raspberry Pi is connected via a RJ45 cable to a Linksys router which is built into the body of the robot. The robot could navigate autonomously and could be manually controlled via a web interface with...

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Big Rob – Raspberry Pi outdoor camera case

The Raspberry Pi camera was mounted without a case on my robot car. But the robot is designed to operate in the field and this is the reason why the camera needs a case to protect the module from weather influences. I had the idea to by a surface box which costs only a few cents. The hardware store has a wide selection of surface boxes and I bought the smallest one which is made from very soft plastic. I was cutting into the cover of the surface box a small hole for the camera lens. I always recommend...

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