Following the same way that we did with the previous articles, we now have to design the component AT24C64, which is an EEPROM memory. This time, I didn’t find any component like that on Sparkfun’s or Adafruit’s library. This time you really might need to draw the component!
Continue reading “Designing The Parts V – AT24C64”
Last article, I wrote about how to use our own homemade Arduino Pro Mini bare bones along with an OLED display and how to make both of them consume as little power as possible. In fact, we managed to achieve a small 1.1 uA current with both of them sleeping. Also in our circuit there were a PCF8563 real-time clock module and one AT24C64 EEPROM memory. Now, to proceed with our smartwatch project we need to add sensors, such as an accelerometer, compass and pressure sensor. This article is about how to add them, read the variables and keep saving power.
Continue reading “Arduino Power-down Mode With Accelerometer, Compass and Pressure Sensor”
On the previous article I wrote about how to use the real-time clock module with the EEPROM non-volatile memory. Now it is time to get something working that resembles a watch. Make something that matters. How about adding a display? Last post it was possible to achieve a power consumption of only
16 uA (improved) 0.7uA on the smartwatch prototype. Now we can see how much power the watch will consume. In this case, it is an application that needs to consume the smallest current possible but also needs a display, then one can use a OLED display, which is the abbreviation of “Organic Light-Emitting Diode”, which is a much more economic display in terms of current than the regular LED displays. An overview about OLEDs, first.
Continue reading “OLED Display and Arduino With Power-Save Mode”
There are numerous EEPROM memories, but one I used was the AT24C64 from Atmel. Atmel is the same company behind the Atmega 328p which is the brain of the Arduino Pro Mini. You would be surprised to see how they interact with people/makers/consumers on Twitter and Google Plus. This memory is non-volatile, which means it wont lose its data went our watch, or your device runs out of power.
Continue reading “Adding EEPROM to your Arduino Pro Mini Smartwatch”