NOW IN STOCK – Analog panel meter [50uA] – Analog panel meters are not a blingy as LEDs but they add a touch of elegance and are easier to read quickly. This one is fairly large and is easy to open up the front with two screws and replace the gauge. There’s a ‘zero adjust’ as well. The back has four 3mm (4-40) screws, 6.5cm apart, so its easy to attach to a box or enclosure
Size: 3.125″ (8 cm) square, 1.25″ thick (the panel is 0.5″, the coil sticks out another 0.75″)
Measures: This panel is 0-50uA which means it can be used with any kind of power supply!
To use with a digital output microcontroller (such as an Arduino or AVR), connect the black wire to ground, a resistor in series with the red wire and the other side of the resistor to a PWM output. Then sweep the output from 0 to 100% PWM to swing the meter. The resistor should be = (Power supply Voltage) * 20,000. So for a 5V supply, 100Kohm. For a 3.3V supply, 66Kohm.
Adafruit publishes a wide range of writing and video content, including interviews and reporting on the maker market and the wider technology world. Our standards page is intended as a guide to best practices that Adafruit uses, as well as an outline of the ethical standards Adafruit aspires to. While Adafruit is not an independent journalistic institution, Adafruit strives to be a fair, informative, and positive voice within the community – check it out here: adafruit.com/editorialstandards
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.
Have an amazing project to share? The Electronics Show and Tell is every Wednesday at 7pm ET! To join, head over to YouTube and check out the show’s live chat – we’ll post the link there.
Python for Microcontrollers — Python on Microcontrollers Newsletter: 100 CircuitPython Community Libraries, a New Arduino UNO and much more! #CircuitPython #Python #micropython @ThePSF @Raspberry_Pi
Looks great! Can you post the demo arduino sketch you used in ask an engineer? Thanks!
its called “Sweep”, its one of the example sketches in the Arduino IDE