Theremingenieur
Senior Member+
I'm currently working on a Teensy 3.2 project which includes a pure analog backend (fed by the DAC and a few PWM signals). The PWM signals which go from 0 to 3.3V have to be filtered, amplified and shifted, so that there will be a voltage output going from -4V to 4V.
Thus I'd need a tiny power supply circuit (similar to these which onehorse produces) which takes 8 to 12V at the input from either a battery or a wall plug adapter, and outputs +5V (up to 200mA) for the Teensy (who will then provide the digital peripherals with 3.3V through the internal voltage regulator) and the positive op-amp rail on one side and -5V (less than 50mA needed) for the negative op-amp rail.
I could naturally design corresponding buck converters, but I don't want to reinvent the wheel. I'd prefer a simple plug and play solution in the 20$ range.
Thus I'd need a tiny power supply circuit (similar to these which onehorse produces) which takes 8 to 12V at the input from either a battery or a wall plug adapter, and outputs +5V (up to 200mA) for the Teensy (who will then provide the digital peripherals with 3.3V through the internal voltage regulator) and the positive op-amp rail on one side and -5V (less than 50mA needed) for the negative op-amp rail.
I could naturally design corresponding buck converters, but I don't want to reinvent the wheel. I'd prefer a simple plug and play solution in the 20$ range.