This usually takes not less than 30 seconds. So a 30 seconds delay is intentionally included in the sketch. For other type of sensors this is not necessary, thence remember to delete the line delay(30 ...

At one end is an LED and at the other the LDR, ... and with a simple divider circuit a voltage can be read by an Arduino. ... but using another LED as the light sensor. Closeup of the sensor: ...

Posted in Arduino Hacks, Holiday Hacks Tagged arduino nano, DF Player Mini, PIR sensor, power LED, raven Motion-Activated Clock Only Lights Up On Command December 16, 2022 by Lewin Day 8 Comments ...

The LDR must be soldered in a way that it can comfortably see ambient light through the Fresnel lens. The tiny microcontroller brain. To be frank, using a microcontroller is probably overkill for most ...