ATtiny43U is a perfect fit for these cost constrained, battery powered applications where small weight and size are important factors. With the ATtiny43U, the PCB can be made smaller because there is no need for an external DC-DC converter and the wiring it needs. Single battery and simple mechanics makes the design more cost efficient. Many of these applications have LEDs and motors that the ATtiny43U can directly drive from its 3V I/O pins. The on-chip boost converter and picoPower technology help to reduce the system power consumption and extend battery life.