Category: Electronics
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Cats and Lasers
I finally am a full member of the internet – I am the proud servant of two cats! To keep them entertained when me and my wife are at work, I built a web-controlled laser-turret: At its heart is an ESP2866 on an nodemcu amica v2, a cheap servo pan/tilt kit with small 9g servos and…
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Control a RaspberryPi Robot using Python and a mobile browser
Usually I use some physical buttons or joystick attached to my electronics in order to quickly test or control components like motors, relais or LEDs. I was searching for a better way, but could not really find one. In this article, I describe how I built a RESTful webserver with websockets, and a javascript-based based…
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Measuring voltage on a Raspberry Pi and displaying it in style
After I completed the circuitry to power my raspberry pi from a battery pack, I wanted a way to display the voltage of the battery pack, and be able to access the voltage level from the raspberry pi, so it can shutdown automatically when critical voltage levels are reached to prevent damage to the filesystem…
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Powering a raspberry pi from battery
The raspberry pi will be the main processing unit of my pypibot. I want to power 6v-motors, so I decided on going with a 7.2v battery-pack. I had one lying around with 2600mAh, which should be enough for testing the setup right now. I originally planned on going the easy way and ordered a converter…
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Neato XV Laser scanner (LIDAR)
So today my Neat XV LIDAR module arrived, and I had to test it directly with the Raspberry Pi. For everyone that does not know this wonderful piece of hardware yet: It is a low-cost 360-degree spinning laserscanner that is usually scavenged from the Neato XV vacuum-robots. In Germany it is quite hard to get…