基于 PIR 传感器的安全警报电路设计 所设计的系统由 Arduino UNO、PIR 传感器、UM3561 IC、扬声器、晶体管和几个电阻器组成。 UM3516 IC 是警笛发生器 IC。

TK has combined a PIR with an Arduino to create a smart safety light for the house or workshop. Follow along as this gets built out into a more extensive project.

Arduino Uno R3 5mm LDR 10K ¼W Resistor 1K ¼W Resistor 5mm Red LED 5V Piezo-Buzzer 9V battery PIR/IR sensor (see text) Sensor Input ...

Hi, I'm Bill. I'm a software developer with a passion for making and electronics. I do a lot of things and here is where I document my learning in order to be able to inspire other people to make ...

Working from home with regular video meetings has its challenges, especially if you add kids to the mix. To help avoid embarrassing situations, [Charitha Jayaweera] created Present!, a USB device t… ...

Regular candles can be awfully boring at times. They can only produce one color and the flicker is so… predictable. They can’t even be controlled by an infrared remote control, not to m… ...

Arduino Micro has some extra leds that it is tricky to programme. Like almost all Arduinos, has a built-in led – the green one on the left in the photo. And it has a pair of yellow leds – called TX ...