blog :. joão costa

@ Interactive Telecommunications Program

Month: April, 2015

energy final : progress

The circuit for the final is almost done. It consists mainly of an Arduino Pro Mini 3.3V, the Real Time Clock from Sparkfun and the EasyDriver stepper controller. Connected to the Voltaic V15 battery, the driver can be powered by 5V and still provide the regulated voltage to feed the microcontroller. For the clock I […]

energy : solar challenge documentation

The solar challenge reached its end. Please refer to this link for a more in depth understanding of the components of the circuit. The final circuit is drawing 5.94 mA while in sleep mode, using the JeeLib, and when writing to the card it goes up to 22 mA. I ended up using the 6W Voltaic Systems […]