npn

Inside Intel’s first product: the 3101 RAM chip held just 64 bits

Intel’s first product was not a processor, but a memory chip: the 31011 RAM chip, released in April 1969. This chip held just 64 bits of data (equivalent to 8 letters or 16 digits) and had the steep price tag of $99.50.2 The chip’s capacity was way too small to replace core memory, the dominant …

Inside Intel’s first product: the 3101 RAM chip held just 64 bits Read More »

Simple way to control 12V DC Motor using Raspberry Pi’s GPIO port and NPN transistor

I needed to control a DC motor from my Raspberry Pi’s GPIO port as part of my time-lapse dolly project. I had to be able to turn the motor on for approximately 150ms which would in turn move the dolly along by 3mm. Parts 12VDC Mini High Torque Motor – Max 50mA at full load …

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