I recently got a Nikon 1 J1 mirroless exchangable lens camera at a great price 🙂 Well actually the price was low because the kit lens (10-30mm) it came with were broken, displaying an error… The annoying lens error “popup” …

Nikon 1 J1 10-30mm lens error Read more »

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I just got a Nikon ML-3 equivalent IR remote for remote controlling my Nikon D3300 camera. I recently also wrote the Arduino Nikon IR remote sketch and I figured why not do some reverse engineering on the “original” remote. I …

Measuring Nikon DSLR IR remote signal Read more »

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I am currently using BeagleBoneBlack for logging some data. The system is designed to work autonomously so normally no wired or wireless connection is available. For testing purposes however diagnostic data can be output to the serial port of the …

Accessing Beaglebone serial port while using a cape – DIY low profile pin header connector Read more »

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So we usually want to have a battery indicator circuit in many of our devices. The indicator warns us if we have left the device powered and also indicates if the device battery is reaching its end of life. The …

Simplest battery / power indicator circuit Read more »

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Sometimes you want an arduino application to be controlled either by a potentiometer (eg. joystick) or by a keypad. Here is a simple resistor circuit that uses two keys and mimicks a potentiometer in three different states – middle position, …

Replacing potentiometer with up-down buttons on arduino Read more »

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I recently cut out a capacitive sensor on my old CNC machine for a friend working at the university. They plan to connect the sensor to Raspberry PI and try to make a virtual friction drum. The sensor is pretty …

Arduino capacitive sensor and the friction drum Read more »

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Step up converters

You ever wanted to supply the 5V voltage to your arduino / electronics project, but didn’t have enough space for 4 or even 6 batteries that are needed to get the correct input voltage? With those cheap (USD 1-2) ebay …

Cheap ebay boost module comparison and performances – 5V from one or two batteries Read more »

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