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Monitors, HDMI and config.txt

After writing about little touchscreens for the Raspberry Pi (TinyLCD, AliExpress LCD), the official Raspberry Pi Touchscreen, now a post about HDMI monitors. I have several now and each has it pros and cons. As usual, the one you use will be dependent on the project and it is nice to have choice. Read More

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RasPiO® Duino and GertDuino

The combination of Arduino, such as the Uno with the ATmel ATmega 328P, and the Raspberry Pi is a natural one. The RPi is an allround computer with I/O facilities and a general purpose, though not real-time, operating system. The Arduino is a programmable microcomputer with also lots of I/O including lots of digital I/O, analog inputs and PWM outputs, made for running a dedicated program with precise real-time performance. Where bitbanging I/O on the RPi is not such a good idea, on the Arduino on the contrary it is common.  Exchange data via the serial ports to let both  platforms enhance each other and work together.

I have two boards that add an Arduino experience to the Raspberry Pi: the RasPiO® Duino and the GertDuino. Both function well. The RasPiO® Duino is a simpler, better supported, better designed and cheaper solution, though you have to solder it yourself. The GertDuino is ready to run, more powerful, since it has two ATmega IC’s (a replaceable 328 in DIP and a 48) but a bit rough on details.

I prefer the RasPiO® Duino. £14 including postage worldwide..  Much better supported and designed, runs on all RPi models and on jessie. The GertDuino, €30,  is a nice, build, and powerful board, Arduino compatible, two ATmega’s, with RTC and IRda, but takes away more of the RPi GPIO like I2C, and is a bit rough to work with and with much less support, the Reset issue, the board space wasted for a non-functional and not present powersupply, and seems to have problems on RPi model 2 and on jessie. Read More

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RPi Cam Web Interface in action

This is my second test of the timelapse/video facilities of a Raspberry Pi with the camera on top.

So I did a standard RPi Cam Web Interface installation, on jessie this time since the installer is not completely finished at the moment for jessie. It went without a problem again. Only  advice I have is to configure the wireless interface before adding the RPi software, so that Apache sees both ethernet and wireless. The WLAN with long antenna operates fine in the garden! Read More

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3.5″ LCD TFT Touch Screen Display Kedei on AliExpress

When surfing for information on 3.5 ” TFT touchscreens for the Raspberry Pi, to improve the TinyLCD experience, I stumbled upon AliExpress where several shops offer a 3.5″ LCD TFT Touch Screen Display for incredible low prices.


So I ordered two for the price of $14,85, postage included. A acrylic case and stylus is also included in that price! The shop Soonics has good reviews, but you  never know if one can trust that.

Here my experiences with the screen: quite slow refresh, not too high contrast, crisp screen, touch works, software works but is already outdated, but considering the price this screen is well worth the money! If I compare it to the NeoSec screen it is a better deal for applications with a high contrast theme and no demand on smooth video.

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Timelapse on the Pi

One of the exciting projects with the Raspberry Pi and the camera used to be the timelapse video.

And it has been the main reason I bought a camera and a case fit for timelapse.


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ESP8266 gallery

The ESP8266 is one of the game changing building blocks of the Internet of Things. It can serve many purposes with its Wifi functionality and has enough I/O facilities to replace an Arduino or Raspberry. Strictly 3.3V, and a bit powerhungry for battery use. Read More

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Arduino kits, components, I/O components, sensors

To get to know the Arduino world better I have bought from ebay two kits: 37 in 1 sensor kit and an Arduino kit. Nice boxes with an interesting array of components to get me started! Read More

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Arduino R3 cases

I use several Arduino cases during my experiments, available from ebay for a couple of dollars, made of acrylic clear plastic. Here I show you two of my favorites. IMG_4483 Read More

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Raspberry Pi boxes

With all the different revisions and the two major supplier it will come as no surprise the packaging has varied quite a bit. I have kept the boxes of my Raspberry Pi’s, shown here. IMG_4481 Read More

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Cases and my Raspberry Pi’s

Starting with the announcement in 2011 and the fist available batch of B’s in 2012 my collection of Pi’s covers most revisions. I tend to case the Pi. Some protection of the bare board seems reasonable. What I look for in cases is: – low price! Some US and European vendors ask ridiculous prices for a bit of acrylic laser cut of low quality. The Chinese are good at that, see ebay! – access to all the connectors like the camera and display and the GPIO connector. – I like to see the internals of the Pi, so acrylic clear cases. – If the cover can be opened easily its a big bonus. That is rare alas. – Clam black shell looks more professional, I have one to show here and some on their way. Raspberry Pi 2011 Model B no fitting holes 256MB. First batch! IMG_4480 IMG_4477
Model B fitting holes 256MB. Gets very hot after some experiments, the ventilator helps! IMG_4479 IMG_4463 Model B fitting holes 512MB. Camera on top, can be rotated and tilted and folded in for transport . Great for time lapse or webcam/security cam purposes. Case bought from Reichelt Germany, also avaiable via Velleman.. IMG_4465 IMG_4466 Model B+, waiting for a better case! IMG_4474 RPi 2 Model B. First one is in clamshell case, second one is mounted on the back of the DSI Touchscreen 7″ display. IMG_4473 IMG_4470 IMG_2441 Model A, first batch IMG_4475 IMG_4476 Model A+ IMG_4469 IMG_4467