Photo Transistor Light Sensor

Sale price £0.83
incl. VAT
excl. VAT
In stock

Awesome Extras

The Pi HutMini Breadboard - Clear
Sale price £1.25 incl. VAT excl. VAT
The Pi HutResistor Packs (1/4 Watt, ±1%)
Sale price £0.83 incl. VAT excl. VAT

A Photo Transistor is a sensor that detects ambient light, a bit like an LDR (and works in a similar way). We prefer these sensors as the package is a little more robust than your traditional LDRs.

When light enters the chip on top, it creates a flow of current from the long to the short pin. When there's no light there's almost no current going across the pins at all. It manages to detect light in a similar way to your own eyes, so it's great for projects that require human-level light monitoring!

To use these with your microcontroller, connect the long leg to 3-15V (DC) and the short leg via a 1-10k resistor to your GND pin, then code to read the analogue voltage via your analogue IN pin. Works great on the Raspberry Pi Pico - just switch it around if you don't get any readings!

Breadboard pictured but not included.


    Payment & Accreditations

    Payment methods
    Amazon American Express Maestro Mastercard PayPal Visa

    Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.