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project update: a TTL/CMOS computer

Exactly one month later – our electronics course at Uppsala University just approaches its end – and I got the next shipment for my new project: 1.1 km of equipment wire.

Top deal of the week?

Today I received a newsletter from the publisher Elektor. I am offered a special deal on a Peltier power generator which can power an LED light from a small candle. And this for an astonishing price of €99.95 instead of the normal price of €119.95.

Great offer from Elektor.

I’ll have to buy […]

Continue reading Top deal of the week?

240×320 TFT with touch on an ATmega328

It’s been a while since I purchased some TFT modules on eBay. These modules come in different sizes and two varieties – with and without integrated touch controller XPT2046. The controller in the TFT display itself is an ILI9341 wired up to be controlled by SPI.

240×320 pixel TFT display with integrated resistive […]

Continue reading 240×320 TFT with touch on an ATmega328

Replacing three remotes

You know the problem – with every new gadget comes a new remote control, and while there are programmable and universal remote controls out there, they will never just do what you want.

The three main remotes in my living room.

For controlling my tv, my digital box and one of the wall […]

Continue reading Replacing three remotes

Fakes from China

Inspired by a Youtube video from Bigclive I ordered some Solar Power Rechargeable Flash lights. I knew the risk but I thought it would be a possible way to get hold of some small amorphous silicon solar cell modules for some own projects.

yeah – a bang good solar flash light

Today I […]

Continue reading Fakes from China

Hacking an AVR programmer II

This is a follow-up of my most popular post, Hacking an AVR programmer.

MX USBasp v3.02

Recently there have been quite a few comments about a new version 3.02 layout of the USBasp programmer available from many Chinese ebay sellers, which appears to be incompatible with my previous hack. The problem is still that […]

Continue reading Hacking an AVR programmer II

Assembling an USBasp

…at eight times timelapse it only takes 4 ½ minutes…

http://www.sciencetronics.com/greenphotons/wp-content/uploads/2016/11/20161102_usbasp_480.webm

An USBasp in a new design II

Most of the time I design and debug my AVR projects on solderless breadboards nowadays. And for that I have been using some different types of programmers by now: starting with the good old STK500, to different versions of USBasp clones from Chinese sellers on eBay.

In order to connect the programmers to the […]

Continue reading An USBasp in a new design II

An USBasp in a new design

Just a small teaser: today I received my circuit boards from PCBgogo – a layout which I just had sent to the Chinese manufacturer last Sunday.

The finished circuit board from China.

It is a USBasp, which can be placed on a breadboard and at the same time supplies the power rails on […]

Continue reading An USBasp in a new design

OctoPrint – a new attempt

It was not so simple to set up a Raspberry Pi as a 3D-print server as I had hoped. It started with issues with the WiFi-dongle, continued to a complete black out on all of my USB web cams and finally I gave up…

I reflashed the SD-card with the latest full Raspbian Jessie […]

Continue reading OctoPrint – a new attempt