A weblog focused on interesting circuits, ideas, schematics and other information about microelectronics and microcontrollers.
Simple negative power supply
This stuff is really small, use some common parts and can be reuse across different needs.
Sometimes you need a simple negative power supply. The best example is the contrast PSU for common small LCD device. Building -5V from a battery or a wallmart supply isn’t really easy. Here is a simple design small device that is able to provide -5V, -12V, -15V using the MAX 764/765/766 series.