Once upon a time, during a lecture about electronics, more specifically on crystal quartz oscillators, a professor said that you can break a crystal oscillator by dropping it, because the quartz inside can be broken due to the fall, even if it seems solid like a common 1/4W resistor. Let me start with a briefing … Continue reading Smoked crystals (Oscillator)
microcontroller
NTC Measurements (Part 1/2)
When dealing with low-cost, home made termometers, the choice often fall on the NTCs. These sensors are resistors which are varying their resistance in function of the temperature, with a negative trend: Negative Temperature Coefficient is their name, also known as Thermistor. That means higher the temperature, lower the resistance: We observe that this cheap … Continue reading NTC Measurements (Part 1/2)
DS1307 Real Time Clock hacking: the emulation
Maybe some of you knows well the so called GertDuino, an expansion board of the RaspberryPi. It is like an Arduino which can communicate with the Rasp, and moreover it also mount an Atmega48 which can be used to emulate an RTC. Yes, I'm going to talk about this. The challenge: proof-of-concept of commercial real … Continue reading DS1307 Real Time Clock hacking: the emulation
ALEA 