They were all powered by a score of car batteries connected to a bank of photoelectric cells the size of a door.
It worked by shining a beam of light onto a photoelectric cell, but the cell did not distinguish between light from the remote and light from other sources.
The projector used a steady light and a photoelectric cell to convert these variations back into an electrical signal which was amplified and sent to loudspeakers behind the screen.
Baird achieved this, where other inventors had failed, by obtaining a better photoelectric cell and improving the signal conditioning from the photocell and the video amplifier.
On both sides of the opening, photoelectric cells emitted infrared beams directed towards the top of the platform.
An alternative power source with functionally similar results is a photoelectric cell (solar watch).
It is a form of photoelectric cell, defined as a device whose electrical characteristicse.g. current, voltage, or resistancevary when exposed to light.
A photoelectric cell collects the light which passes through the cuvette.
