LCD Clock w/ RTC and Temp

LCD Clock with Real Time Clock (Date and Time) and Temperature Display.


  • Bright two row, 16 character LCD display with contrast control
  • Display date and time (12hr or 24hr) utilizing DS1307
  • Displays temperature (Celsius and Fahrenheit) utilizing DS18B20
  • Cycle mode between time and temperature
  • Plays Westminster chime on the hour and chimes the hour count (night time quiet mode or may be disabled)
  • 24hr reoccurring alarm (pulsating or continuous) with 10 min snooze alarm
  • External relay output control
  • Real Time Clock (RTC) saves date and time when powered off
  • Port for RS232 output for display/setup on terminal (requires RS232 mini-board)
  • Mode and three setup switches
  • All mode settings stored in non-volatile EEPROM (restored on power-up)
  • 16F886 PIC based project electronic kit
  • Double sided silkscreened and solder masked high quality PCB
  • Available in kit or fully assembled and tested

Mode Switch (S6): normal mode cycle between time and temperature displays
      In time display mode, press and hold Mode+SelectA (S7) = set date/time via RS232
      In time display mode, press and hold Mode+SelectB (S8) = toggle 12hr/24hr display
      In time display mode, press and hold Mode+SelectC (S9) = toggle cycle mode

While in time display mode:
      SelectA (S7) enters Set Date mode
      SelectB (S8) enters Set Time mode
      SelectC (S9) enters Set Alarm mode

While in any of these set modes:
      Mode switch exits back to normal mode
      SelectA changes month or hour
      SelectB changes day or minute
      SelectC changes year or sec

While in Set Alarm mode:
      Press and hold Mode+SelectA to toggle Alarm enable on/off
      Press and hold Mode+SelectB to toggle Relay control enable on/off
      Press and hold Mode+SelectC to toggle Alarm mode between pulse/continuous

When alarm is sounding:
      SelectA will cancel (silence) alarm
      SelectB will cancel (turn off) relay control output
      SelectC will snooze for 10 minutes