light
2 pages across tutorials, modules, pinouts and guides.
beginnerModuleUpdated
Ambient Light Sensor
A phototransistor and a 4.7 kΩ resistor on a TinkerBlock board: light makes a current, the resistor turns it into a voltage, and SIGNAL rises with the light. A lit room reads low on the scale, bright light flattens just under VCC, and it sees near infrared best.
beginnerModuleUpdated
Infrared Receiver
An infrared light sensor on a TinkerBlock board: an Everlight PT334-6B phototransistor in a black 5 mm package and a 10 kΩ load, so SIGNAL is an analog voltage that rises with how much infrared arrives, steady or flashing. The partner of the TK63 for a break-beam. It is not the TK15 IR Receiver: it decodes no remote, and the TK15 ignores steady light.