Current limiter – Safety lamp

WARNING! BEFORE READING, BULDING & USING!! BE CAREFULL WITH 230V/110V AC POWER! ONLY BULD THIS DEVICE IF YOU KNOW WHAT YOU ARE DOING. ONLY USE THIS DEVICE IF YOU ARE A TRAINED ELECTRICIAN. The current limiter This “lamp device” protects the device you are working on, we call it Current limiter. If there is a […]

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Device (adaptor) voltage/power/polarity

Device Connector Volt Power Polarity Acorn Acorn Atom – Unexpanded with non bridged regulators 5×2.5 mm DC jack 8-10V 1.8A positive center Acorn Atom – Expanded with bridged regulators 5×2.5 mm DC jack 5V 3A positive center Sega Sega Game Gear 5.5mm x 2.1mm / 2.5mm 9V 3W Negative Center  

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Compact Flash LED not working

Some Compact Flash (CF) to IDE adaptors fail to light up the drive activity LED, I was wondering why… I took a board and removed some components and did some measurements, and I  discovered that the BOTH base pins of the NPN transistors are connected to ground. Huh?! That means that the transistors won’t switch […]

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Arduino Leonardo – Micro Pro bootloader flash

Bootloader upload / fix If the Arduino Micro Pro isn’t working/detected by your OS anymore, you have to fix the bootloader. To do this you can use an USBASP device.     Wiring Signal USBASP Arduino Micro Pro MOSI 1 D16 VCC 2 VCC RESET 5 RST SCK 7 D15 MISO 9 D14 GND 10 […]

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