Category Archives: adc

Using a 555 timer and ADC as a random seed

Most toolchains for embedded system include support for random number generation. But if you’ve read the manual you’ll know that this is really just¬†pseudo random number generation (PRNG). When calling this function the same numbers will always return in the same order unless a different random number seed is supplied in advance. [Gardner] put together […]

A truly professional Raspi analog input

Much to the chagrin of hardware tinkerers, the Raspberry Pi doesn’t have analog inputs on its GPIO pins. Sure, you can blink a LED with just a few console commands, but reading sensors with a bone-stock Raspi requires a little additional hardware. [Brian Dorey] just released a board that allows for 8 analog inputs on […]