I Built a GIANT 7-Segment Display!

In this video, we are scaling up from small electronics to build a massive, custom 12-inch 4-digit 7-segment display panel! This heavy-duty display is perfect for outdoor clocks, scoreboards, and industrial counters. We break down how to design a custom driver board using an ESP8266 Wi-Fi microcontroller, daisy-chained 74HC595 shift registers, and ULN2003 Darlington transistor arrays to solve the high-voltage and high-current challenges of giant LEDs. You will also see how I prototyped the initial test sample and crafted custom plexiglass enclosures for each individual digit to make it weather-resistant and professional. Key Formula Used (Ohm's Law): Resistor = (Supply Voltage - LED Series Drop - ULN2003 Drop) / Desired Current R = (12V - 8.0V - 1.1V) / 0.02A = 145 Ohms (Used 150 Ohm standard resistors) If you enjoyed the video, please drop a LIKE, leave a comment if you have questions about the wiring, and SUBSCRIBE for more advanced DIY electronics projects! Chapters: 0:00 - Introduction & Project Reveal 0:42 - The Hardware Challenge (Why we need Transistors) 1:28 - Multiplexing vs Shift Registers (74HC595 Explained) 2:00 - Exact Electrical Math & Resistor Calculations 2:45 - Custom Plexiglass Enclosures & Final Demo HARDWARE USED IN THIS VIDEO: • ESP8266 NodeMCU https://s.click.aliexpress.com/e/_c4e... • 74HC595 https://s.click.aliexpress.com/e/_c3k... • ULN2003A https://s.click.aliexpress.com/e/_c3e... • 12" LED 7 Segments https://s.click.aliexpress.com/e/_c33... • 12V Power Supply https://s.click.aliexpress.com/e/_c2I... Useful Tools electronic tool kit https://s.click.aliexpress.com/e/_dXr... Hardware tool kit https://s.click.aliexpress.com/e/_dSI... Desktop oscilloscope https://s.click.aliexpress.com/e/_d8d... hand held oscilloscope https://s.click.aliexpress.com/e/_dXj... cordless drill + screw driver https://s.click.aliexpress.com/e/_d9n... power supply https://s.click.aliexpress.com/e/_dVM... soldering station https://s.click.aliexpress.com/e/_dXU... Drill press https://s.click.aliexpress.com/e/_d6G... 3d printer https://www.aliexpress.com/item/33009... CNC machine https://s.click.aliexpress.com/e/_d7b... My Channels: KIYANI' KI LAB    / @kiyanikilab   KIYANI TECH    / @kiyanitech   Instagram:   / kiyani676   fecebook:   / kiyanis-lab-1520512291502452   Previous videos:    • how to make mini cnc plotter      • Let's Answer Your Questions   #DIYElectronics #ESP8266 #7SegmentDisplay #ArduinoProject #CustomLED #74HC595 #ULN2003 #MakerMovement