When it comes to a 5V negative voltage regulator, we usually choose the 7905 three-terminal negative regulator chip as the first choice because it is both easy to use and cheap. Plus, it can supply up to 1.5A when equipped with a sufficient heatsink. We can also turn it into an adjustable voltage regulator by … Read more
Learn these transformerless power supply circuits, use a capacitor instead, it smaller and lighter than transformer. There are circuits as follows. Read more
Dual DC Regulator using +12V, -12V and Ground output Read more
Multi voltage power supply circuit. There is 2 Dual output, The 12V are +12V,-12V, Ground. And also the 5V are +5V, -5V, Ground. All 1A max. Read more
See two negative Voltage Regulator circuit ideas. Do you know? we can use PNP transistor and Zener diodes in these example circuit 12V,9V at 700mA output Read more