Buzzer: An audible buzzer provides an additional layer of feedback, alerting users to test results. – Library for Arduino ... while a red LED and buzzer signal a problem such as an open circuit ...

So he decided to change the radio over to work on the 6 meter band ... because it is easier to create an SSB signal at a fixed frequency. The Arduino drives a frequency synthesizer and an OLED ...

[Scott] wrote in to us with his simple, but well done RF signal strength meter. As he points out in his post, sometimes an Arduino is overkill, so a Picaxe 08M was used instead. Apparently this ...

Check out this Arduino-based electronic component tester. The device is intended to give a simple way to test transistors, resistors, capacitors, diodes and MOSFETs, and such like. The Arduino tester ...

Arduino has taken the product “maker” world by storm and ... The digital nature of the DDS process results in an output signal and many signal images. The images follow a sin(x)/x envelope. This ...

In this circuit, the infrared emitter IRED1 is modulated by connecting its anode (A) to ~38kHz signal yielded by D9 of the Arduino Uno (TP1) while its cathode (K) to a ~1kHz signal available at D8 of ...