Analog Nightlight
A no-code nightlight: an LED noodle switched by a photoresistor and a 2N2222 transistor on perfboard, powered by a USB wall adapter.
Analog Nightlight
Key Features
- Uses the 10K Potentiometer
- Uses the LDR Photoresistor
Key Benefits
- Free, open lessons. The Moving Rainbow textbook has the kit page, wiring, and MicroPython code.
- Classroom friendly. Built on a solderless breadboard or no-solder connectors.
- Try before you build. An interactive MicroSim on the kit page runs in the browser.
- Real-world data. Students read sensors and turn measurements into decisions.
- Budget. About $4–$6 (sum of the listed parts).
Parts
| Part (price) | Role |
| 10K Potentiometer | Input knob |
| LDR Photoresistor | Sensor |
| 830-Point Breadboard ($1.10) | Breadboard |
Microcontroller listed first. Prices shown only where known; see the source book for quantities, wiring, and current prices.
About this kit: From the Moving Rainbow collection.
Source: Moving Rainbow
Source: Moving Rainbow