# Make a first PCB: Random number generator circuit ## Description Welcome to your new project. Imagine what you can build here. ## Project Details - **Owner:** greg - **Created:** 3/28/2022 - **Last Updated:** 12/15/2025 - **Visibility:** Public - **Stars:** 1 ## Key Components ### D1 — 7 Segment Display - Forward Voltage: 2V - Datasheet URL: https://datasheet.octopart.com/VDMY10C0-Vishay-datasheet-78835439.pdf - Part Type: Display Device - Power: 70mW - Manufacturer Part Number: VDMY10C0 - Forward Current: 20mA - Purchase Url: https://octopart.com/vdmy10c0-vishay-30987499?r=sp#Specs - Manufacturer Name: Vishay - Color Wavelength: 589nm **Pins:** - A - B - C - CATHODE - CATHODE - D - DP - E - F - G ### IC1 — [NE555D2](https://www.flux.ai/vasyl/ne555d2~sm9.md) - Manufacturer Part Number: NE555D - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - Datasheet URL: https://rocelec.widen.net/view/pdf/giqzbewdkx/slfs022i.pdf?t.download=true&u=5oefqw **Pins:** - CV [pin 5] - DIS [pin 7] - GND [pin 1] - Q [pin 3] - R [pin 4] - THR [pin 6] - TR [pin 2] - VCC [pin 8] ### IC2 — [NE555D2](https://www.flux.ai/vasyl/ne555d2~sm9.md) - Manufacturer Part Number: NE555D - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit - Datasheet URL: https://rocelec.widen.net/view/pdf/giqzbewdkx/slfs022i.pdf?t.download=true&u=5oefqw **Pins:** - CV [pin 5] - DIS [pin 7] - GND [pin 1] - Q [pin 3] - R [pin 4] - THR [pin 6] - TR [pin 2] - VCC [pin 8] ### U1 — CD4026BE - Manufacturer Part Number: CD4026BE **Pins:** - A - B - C - CARRY_OUT - CLK - CLK_INHIBIT - D - DISPLAY_EN_IN - DISPLAY_EN_OUT - E - F - G - RESET - UNGATED_C_SEGMENT_OUT - VDD - VSS *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/greg/make-a-first-pcb-random-number-generator-circuit~62](https://www.flux.ai/greg/make-a-first-pcb-random-number-generator-circuit~62).* --- *Generated from [https://www.flux.ai/greg/make-a-first-pcb-random-number-generator-circuit~62](https://www.flux.ai/greg/make-a-first-pcb-random-number-generator-circuit~62)*