DS1307 Real-time Clock

Using DS1307 Real-time clock is discussed. A module in AliExpress costs only about $1. It even consists of a 32k EEPROM called AT24C32.

Figure. Setup.

DRV2700 Piezo Driver

DRV2700 is a single chip Piezo driver which is 4 mm x 4 mm x 0.9 mm in size. It can be used in 100 V boost or 1 kV flyback configuration. Supply voltage is 3 V - 5.5 V. In this article, evaluation of DRV2700EVM module is discussed.

Figure. Testing DRV2700.