Money has to be saved everywhere these days, but should a public entity be allowed to flog the family silver? The city of Stralsund, UNESCO world heritage site, has recently silently and covertly sold off a unique library collection. An online petition was started with the aim to revoke this action: https://www.openpetition.de/petition/online/rettet-die-stralsunder-archivbibliothek
Month: 2012-11-20
buying electronics on ebay
Based on my experience buying electronic components on ebay I decided to maintain a personal white-list and black-list of ebay sellers.
The best LED bulb? – part 2
Ok, let us continue the reverse engineering of the E27 LED bulb LEDARE from IKEA. After describing the actual light emitting diode assembly in the previous post, I will today look deeper under the hood into the power supply. The power supply itself is located in a plastic cylinder which is screwed to the cast… Continue reading The best LED bulb? – part 2
The best LED bulb?
At least the best one I have seen so far. After giving a lecture on LEDs yesterday I finally unpacked and tested my latest buy – the clear E27 LED bulb LEDARE from IKEA. The specs of this LED bulb are not overly impressive, with an efficacy of a mere 50 lm/W it is about… Continue reading The best LED bulb?
DIY STK505 replacement
The Atmel STK500 development board does support many but not all of Atmels AVR controllers. As an enhancement a STK505 unit was constructed by Atmel to support the ATtiny24/44/84 series of microcontrollers, which come in a 14-pin DIP package. Other plugin-boards for other pinouts have also been made, but since the STK500 itself is considered… Continue reading DIY STK505 replacement