| abstract |
A system can include a LED unit socket; and LED supply circuitry that includes a digital to analog converter, an operational amplifier operatively coupled to an analog output of the digital to analog converter, and a metal-oxide-semiconductor field-effect transistor that includes a gate operatively coupled to an output of the operational amplifier, a source operatively coupled to an input of the operational amplifier and a drain operatively coupled to the LED unit socket. |