Make a large homebrew LED display for Network Caller ID
B Tod Cox writes in, “My wife wanted to be able to know who was calling without having a phone nearby or going to look at a tiny caller id box. So, I started with John Chmielewski’s NCID (Network Caller ID) project on sourceforge and ported it to the Raspberry Pi. This was not a necessary development step, but the process got me well acquainted with debugging and testing new stuff with NCID. I had tinkered with Arduinos and stumbled across the red LED matrix panels sold by Adafruit; combining them with NCID led to the creation of NCID Display. I would be remiss to not mention that John Chmielewski was a huge help on both the porting NCID to the Raspberry Pi and the development of NCID Display.
16×24 Red LED Matrix Panel – Chainable HT1632C Driver: These LED panels take care of all the work of making a big matrix display. Each panel has six 8×8 red matrix modules, for a 16×24 matrix. The panel has a HT1632C chip on the back with does all the multiplexing work for you and has a 3-pin SPI-like serial interface to talk to it and set LEDs on or off (you cannot set the LED to be individually dimmed, as in ‘grayscale’). There’s a few extras as well, such as being able to change the brightness of the entire display, or blink the entire display at 1 Hz. Read more.
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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.