2 layers224 × 78 mm
VFD Clock
AronASzucs/IV-11-VFD-Clock
6-digit Soviet IV-11 VFD tube clock — custom PCB, mixed 25V/1.5V power system, 7-state FSM firmware
41 parts43
2 layers225 × 80 mm
This repository contains a design for an IV-11 based Vacuum Fluorescent Display (VFD) display unit.
- Size
- 225 × 80 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 72
- Nets
- 171
- Pads
- 516
- Tracks, vias
- 2,112, 206
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 5 Jun 2018
- Updated
- 28 Jan 2025
Overview
VFD is an open-source printed circuit board by davidmpye, from the davidmpye/VFD repository on GitHub. It is a 2-layer board of 225 × 80 mm with 72 parts on 171 nets, routed with 2,112 tracks and 206 vias.
It is built around the UDN2981A-T, 74HC595 and WS2812B. Its parts include 20 ICs, 9 diodes, 8 capacitors, 8 resistors and 4 switches. It belongs with the lEDs and displays boards of this library.
Main components
3
UDN2981A-T
DIP18-3008-Channel Source DriversALLEGRO MICROSYSTEMUncategorised
74HC595
SOP-16-40℃~+85℃ 1 100ns@5V,50pF 10MHz 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOP-16 Shift Registers ROHSGRShift Registers
WS2812B
5mm X 5mm Surface Mount RGB LED with Intelligent ControlWorldsemiUncategorised
README
README.mdThis repository contains a design for an IV-11 based Vacuum Fluorescent Display (VFD) display unit.
Key points of the design:
- Support for 8 tubes (can install only 6 if you want the traditional 2-2-2 clock display)
- Can daisy chain boards to make longer displays
- Wifi capable (MQTT etc? - firmware doesn't yet enable this)
- Runs off a 5V 2A supply (USB B socket)
- Four buttons for setting time/other functions
Parts count/prices kept down by using 'generic' ebay modules to provide:
- DS3231 Real Time Clock (battery backed)
- Boost converter module to provide the ~25VDC to power the VFD
- Buck converter module to provide 1.5v to heat the cathodes
- Wemos D1 Mini board to provide the brains
- 5mm encapsulated addressable RGB LEDs to provide the colour effects.
Please see the project wiki for more details.
Parts
72| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 100nF | Capacitor_THT:C_Disc_D7.0mm_W2.5mm_P5.00mm | C1, C2, C3, C4, C5, C6, C7, C8 |
| 8 | 74HC595 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U1, U2, U3, U7, U8, U9, U14, U15 |
| 8 | IV-11 | VFD:IV-11 | VFD1, VFD2, VFD3, VFD4, VFD5, VFD6, VFD7, VFD8 |
| 8 | UDN2981 | Package_DIP:DIP-18_W7.62mm_Socket_LongPads | U4, U5, U6, U10, U11, U12, U16, U17 |
| 8 | WS2812B | 5mm-neopixel-wide:LED_D5.0mm-4-Wide | D1, D2, D3, D4, D5, D6, D7, D8 |
| 4 | switch | Button_Switch_THT:SW_Tactile_SKHH_Angled | SW1, SW2, SW3, SW4 |
| 3 | 10k | Resistor_THT:R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | R1, R2, R4 |
| 2 | , | ||
| 2 | 4k7 | Resistor_THT:R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | R7, R8 |
| 1 | 22k | Resistor_THT:R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | R5 |
| 1 | BoostBoard | GenericModules:MT3608BoostConverterModule | U19 |
| 1 | D | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D9 |
| 1 | DATA_IN_CONN | Connector_PinSocket_2.54mm:PinSocket_1x06_P2.54mm_Horizontal | DATA_IN1 |
| 1 | DATA_OUT_CONN | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Horizontal | DATA_OUT1 |
| 1 | DS3231RTCModule | GenericModules:DS3121RTCModule | U20 |
| 1 | I2C_CONN | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Horizontal | J2 |
| 1 | LDR03 | OptoDevice:R_LDR_10x8.5mm_P7.6mm_Vertical | R6 |
| 1 | LM2596BuckConverterModule | GenericModules:LM2596BuckConverterModule | U18 |
| 1 | MountingHole_4.3mm_M4 | MountingHole:MountingHole_4.3mm_M4 | |
| 1 | PWR_IN_CONN | Connector_PinSocket_2.54mm:PinSocket_1x05_P2.54mm_Horizontal | PWR_IN1 |
| 1 | PWR_OUT_CONN | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Horizontal | PWR_OUT1 |
| 1 | Polyfuse | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P15.24mm_Horizontal | F1 |
| 1 | R | Resistor_THT:R_Axial_DIN0411_L9.9mm_D3.6mm_P12.70mm_Horizontal | R3 |
| 1 | USB_B | Connector_USB:USB_B_OST_USB-B1HSxx_Horizontal | J1 |
| 1 | WeMos_mini | wemos_d1_mini:D1_mini_board | U13 |
The 67 most common of 72 parts.
Questions
How big is the VFD PCB?
It measures 225 × 80 mm and has 2 copper layers, 1.6 mm thick.
What parts does the VFD use?
72 parts, built around the UDN2981A-T, 74HC595 and WS2812B. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the VFD KiCad files?
From the davidmpye/VFD repository on GitHub, at the commit this page was made from: the board is IV11/VFD.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the VFD design in my own project?
Its repository states no licence, so its author keeps all rights: ask davidmpye before reusing the design.
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