Martin Sivak
My shield with RTC, LCD, RFlink and temperature
My shield with RTC, LCD, RFlink and temperature measuring capability. It is aiming at low power mode so the 555 acts as interrupt generator to wake up the board (pin 2, about 180Hz). This really is the first version of the board so I expect bugs will happen.
The LCD backlight is controlable from Arduino using PWM (and filtering capacitor to smooth the transitions) on pin 11.
LCD and RTC are controlled using the two I2C expanders. Pins 7 and 8 act as write and read enable signals for RTC.
RFLink TX/RX are connected to pins 5 and 6. Pin 4 acts as chip enable for all RTC and RFLink chips.
Temperature measurement is done through pin A2.
My shield with RTC, LCD, RFlink and temperature
My shield with RTC, LCD, RFlink and temperature measuring capability. It is aiming at low power mode so the 555 acts as interrupt generator to wake up the board (pin 2, about 180Hz). This really is the first version of the board so I expect bugs will happen.
The LCD backlight is controlable from Arduino using PWM (and filtering capacitor to smooth the transitions) on pin 11.
LCD and RTC are controlled using the two I2C expanders. Pins 7 and 8 act as write and read enable signals for RTC.
RFLink TX/RX are connected to pins 5 and 6. Pin 4 acts as chip enable for all RTC and RFLink chips.
Temperature measurement is done through pin A2.