1.5V battery powers white-LED driver

https://www.electronics-lab.com/1-5v-battery-powers-white-led-driver/

Although white LEDs are common in a variety of lighting applications, their 3 to 4 V forward-voltage drop makes low-voltage applications challenging. Charge pumps and other ICs are available for driving white LEDs, but they generally don’t work with the low supply voltage of 1.5 V in single-cell-battery applications. The low-voltage circuit of Figure 1 provides […]