Ricoh SP C250DN Laser printer Toner cartridge Hack

Some days ago my printer stopped working with the well known message "toner empty" showing on the display. But wait, the cartridges are heavy. Hmm...Are the toners really empty ...

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The lack of motivation, interest, ...whatever of fellow students

A week ago the second semester started here at the University of Bradford. My initial courses I wanted to take this semester are not available (Web Technologies and Humand Computer ...

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[Update] How to drive 8192 RGB LEDs (each 24Bit RGB brightness) with one STM32 Microcontroller (without much CPU load)

First of all I suggest to read my post about the 4096 RGB LEDs solution (link: http://esdblog.org/how-to-drive-4096-rgb-leds-each-24bit-rgb-brightness-with-one-stm32-microcontroller-without-much-cpu-load/ ). I noticed some time a strange behaviour of the 4096 ...

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Metabo E150 welding machine repair (failure caused by bad solder joint)

Note: This is a guest post by David, a friend of the blog owners Today I got in a Metabo E150 for repair. This machine is a 150A STICK/TIG ...

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How to drive 4096 RGB LEDs (each 24Bit RGB brightness) with one STM32 Microcontroller (without much CPU load)

A while ago I ordered some chinese LED modules (the very cheap ones) on Aliexpress and now they arrived very quickly. I ordered also a cheap chinese LED controller but ...

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