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.
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.