Boards in 24 GitHub repositories, designed in KiCad, that use the CD4017BE by Texas Instruments (-55℃~+125℃ 1 135ns 3V~18V 5.5MHz 500mW Asynchronous CD4000 Divide-by-10 Reset function、Cascade counter、Static operation Rising Edge Synchronous Up Counter DIP-16 Counters, Dividers ROHS). See how each wires it, with its parts, size, README and files; the CD4017BE’s symbol, footprint and pinout are on its own page.
tebl/BulkyMIDI-32
A HW build of the MT32-PI project, allowing you to emulate a Roland MT-32 using a Raspberry Pi. Includes enough additional modules to build a MIDI-mountain as well as adapters for connecting to most things retro.
lambdaBoost/MC6205-graphical-display
graphical display on old neon plasma screen
Ismael034/ulp_daughterboard
KiCad project files for a hardware CTF challenge used during the 2026 ULP CTF. The board is meant to be used with the ch32v203-dev development board.
Bindless-Chicken/Metronome
:musical_keyboard: Tiny logic only metronome for when you are on the move
bitsoko-services/narra
This repository contains hardware designs and software for Narra, an open source, BLE advertising and control, LED signage platform. The project utilises the ESP32 and the ESP-IDF framework.
bsidestlv/bsidestlv-2026-badge
Everything for the BSidesTLV 2026 badge: two KiCad boards, the RP2040 firmware that runs on it, and the online puzzle challenge — Alice in AI Land — that the badge is used to play.
bygabrielalmeida/Sinalizador-Crepuscular
Repositório dedicado ao desenvolvimento de um sinalizador crepuscular, projetado para automatizar e aprimorar a iluminação em transições entre dia e noite.
confusedCoyote/PCB-15cm-ruler
A Printed Circuit Board ruler with some helpful hints
Darexsh/RGB-Ringlight
Discrete RGB LED chaser ring powered by an NE555 astable clock and CD4017 counter. 24 LEDs arranged in a circular RGB sequence with variable chase speed.
existedinnettw/flywire
Point-to-point wiring for hand-built KiCad boards (wire wrap, fly wires): curved, non-overlapping wires and an interactive HTML back view
Lichtwerkstatt/ElectronicTinkerStuff
A little Repository with all our small electronic projects
maheen-ahmed1/OptoTACH
Precision non-contact optical tachometer (0–9999 RPM/RPS) built entirely with discrete CMOS logic & 555 timers; no microcontroller, no firmware. Includes KiCad EDA, 3D model, Python simulation, and bench validation.
Sparkshiva007/LED-chaser-PCB
A simple LED chaser circuit using a 555 timer and CD4017 IC, designed in KiCad. It lights up LEDs in sequence like a running light effect.
