Fun FPV RC tank

If you have an Android phone you can download IP Webcam application and have remote IP camera where you can see video stream in web browser screen. But this stuff may become boring as you camera isn’t moving. Nikus decided to build a better solution that would allow follow things with FPV (First Person View). He took Arduino Leonardo and equipped it with robotic threaded platform.

He used H-bridge TB6612FNG circuit to control motion motors. Also he added two servos for camera pan and tilt control. He built RF remote link by using two NRF24L01 modules. On his remote control he assembled two joysticks that are interfaced to another Arduino. After assemble was complete he had great robot that can move around the house and record videos. Since video is streamed to PC, it becomes easy to control. There can be lots of funny video made while crawling around.

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How to Install GSM Repeater

Mobile technology has opened a lot of doors for communication in places that weren’t always possible. Today, you can use your cell phone just about anywhere. For this reason, it can be even more frustrating when you experience a weak signal in your home or office. The best solution for this problem is to install a GSM repeater in the area where you are experiencing low reception.

gsm-mobile-booster

What is a GSM Repeater?

Low signal can be caused by a variety of conditions, such as interference, thick walls or other obstructivestructures, or the distance from the cell tower. Since cell phones operate by transmitting radio waves from one base station to the mobile unit, the GSM repeater acts as a middle receiver, in which the signal is amplified before being sent to the cell phone. Continue reading

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Cheap Arduino brew monitor

Martin and his friends started brewing beer at home. They started with simple and manual temperature monitoring which appeared to be inconvenient. First of all you need to be in place to check fermentation temperature. So they started looking for simple system that would read temperature and plot data on the web. They found out that most of them are over budget or require significant effort in configuring. So they started their own Brewmonitor.

arduino_brew

They took cheap Arduino clone and connected DS18B20 temperature sensor. Then they used ESP8266 Wi-Fi module for internet access. By using POST method they were able to post temperature values to web-server with PHP and MySQL. AngularJS front-end graphs data and refreshed it every time page is loaded. From this point system can be further upgraded by adding freezer/heater to sustain required temperature. But again, additional features may rise overall cost. Keep an eye on project at Git.

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Simple Arduino experiments with nixie

Kevin is collecting parts for his nixie clock project. But before starting he played couple experiments on starting and controlling IN-12s and In-3s nixie indicators.

in-3s_arduino_test

In order to start IN-3s there is 90 volts needed. He had 170V step-up converter board, so he added 68k resistor in series to get to required level. Next step was to connect to Arduino. For this purpose he used MJE340 power transistors. After this successful experiment he will head straight to clock project.

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