LDRs or Light Dependent Resistors are very useful especially in light/dark sensor circuits. Normally the resistance of an LDR is very high, sometimes as high as 1000 000 ohms, but when they are ...

The switch is a semiconductor relay S202DS2 and the oscillator is 4060. Sensor Light Switch Schematic. From the moment that T4 and T5 are opened, relay’s LED start to light and powers the lamp. As ...

This is a good project - building a whistle-activated light switch. Hold a note to turn it on, and whistle again to turn it off! Check out the website of Luke Allen, a US Navy officer, where he ...

The technique employs light-activated proteins to stimulate particular brain cells and positron emission tomography (PET) scans to trace the effects of that site-specific stimulation throughout ...

The agent promises to shed new light on the phenomenology of learning, memory and neurodegeneration. A German-French team has developed a light-sensitive switch that regulates a protein implicated ...

When a weaker light beam courses through the second optical line, the ring heats up and swells, interfering with the main beam and switching off the transistor. This switch can flip on and off up ...

A team of researchers has developed a light-activated switch that can turn genes on and off in mammalian cells. This is the most efficient so-called "optogenetic switch" activated by red and far ...