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Characterizing the SMD diode marked B88

A good while ago I had ordered a bunch of PMEG3050EP SMD Schottky diodes. When the parts eventually arrived from China, however, they weren't marked 'A7' on the case but 'B88'. The part still looked like a diode, but I couldn't find any data sheet or specs. So I decided to run a few measurements.


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Ersa i-CON PICO: Getting rid of Error 8

I purchased an Ersa i-CON PICO soldering station just three months ago. Now it sporadically started to show the 'Err 8' screen. After each restart, everything was back to normal, though. Here's how I solved it (at least for now) by cleaning all relevant contacts.


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Fixing the USB plug of a DAB+ receiver

I've already had to return a PMT801 DAB+/Bluetooth receiver once because the USB receptacle has come off the PCB. Last time the device was still covered by warranty. This time it wasn't. So let's crack open the case and see if this can be fixed.


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Dimming the LEDs of a FRITZ!DECT 200

The AVM FRITZ!DECT 200 is a smart plug that measures power draw, can switch the attached load remotely and features a built-in temperature sensor that can be coupled to smart thermostats. It's a really useful device, weren't it for the fact that its LEDs are way too bright to meaningfully use it in a bedroom. Here's how to reduce their brightness.