There was an intention to use the Cuk configuration circuit again, like the old circuit in EDN, but with an output voltage of about -1 V only and a low—less than 2 mA—output current. While exploring ...

Sisah 220 Volt Auto Day/Night On/Off Photocell, LDR Sensor Switch is best for use in an outdoor environment where managing the frequent turning on and off of the light source is not possible.