Overview of Digital Clock and Power Management Systems:
The digital clock power management system integrates the charging and discharging function of the lithium battery, and has the function of year, month, minute, minute and second, three keys (later changed to four-key control, plus a countdown key) control, time data can be saved, and the serial port can be saved. (or Bluetooth) adjustment, a digital clock with a brightness-adjustable high-power LED (which is actually quite simple).
Lithium battery charge and discharge digital clock specific description:
- Power supply uses 3.7V lithium battery, 430 and 1.3 inch OLED power supply uses TI's TPS62240, voltage 1.8V can work, 430 download program, the voltage should be adjusted to 2.2V or more, high-power LED power supply uses TPS61230, plus a potentiometer Adjust the output voltage size, do not need high power LED power consumption is less than 15mW, still relatively large, there is time to adjust, Nokia's screen;
- Power Charge Management TI's BQ24165;
- Discharge management DW01 + N-MOS, in fact, can not, the over-discharge voltage is too low, to string two diodes;
- The serial port does not have an interface, and the program is written;
- Store 430 internal Flash.
Note: There are more source code, and OLED is not uploaded. (See the attached content for details)
Physical picture display:
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