Simple Transformer less Power Supply

This is the simplest version of a transformer less power supply to power low current devices. It can give 30 to 40 milli ampere current and 12 to 15 volt DC depending on the input voltage.

Current in AC Capacitor

When a capacitor and a resistor are connected to AC lines, a constant current can be maintained through the resistor, so long as the Rectance of the capacitor is greater than the resistance of the resistor. The current flow depends on the value of the capacitor assuming that the input voltage is greater than the output voltage.