As much as you may want to change that old pull-chain ceiling light into a switch-activated unit ... Before touching the wires, ensure the circuit is off at the breaker. If you can't identify ...

[Vadim] chose an ATtiny2313 to handle the RC-5 IR protocol and switch the light. The circuit still has a switch to manually control the lights, preserving the original functionality of the light ...

"By revealing how a light-activated switch can reshape cells in real time, we're uncovering basic design principles for how living systems self-organize and evolve shape," says the study's senior ...

"A very tiny light-activated switch on the opposite side from the battery allows us to turn the device from its 'off' state to an 'on' state upon delivery of light that passes through the patient ...

The pacemaker also has a light-activated switch, and this is paired with a small heart rate sensor that the patient wears on their chest. When the latter detects the patient's heart slowing below ...

“A very tiny light-activated switch on the opposite side from the battery allows us to turn the device from its ‘off’ state to an ‘on’ state upon delivery of light that passes through the patient’s ...