Vfddriver
ansemjo·chronovfd·sandwich/boards/vfddriver.kicad_pcb
About the Vfddriver PCB
Vfddriver is an open source PCB design by ansemjo, published on GitHub under the CERN-OHL-P-2.0 license. It is a board measuring 75 × 40 mm, with 32 components from 23 distinct parts.
Other key parts include the IVL2-7/5, LM4871MX/NOPB, LM2733YMF/NOPB and HV5812WG-G. By type, the board carries 14 resistors, 10 capacitors, 4 ICs, 2 diodes, 1 connector and 1 inductor.
It belongs with the displays & leds designs in this gallery.
From the project
hardware project for a clock around a russian ivl2-5/7 vfd and an esp32-wroom module
~~ a vacuum-flourescent display clock project ~~
The first prototype of this clock was built completely on protoboard and can be seen on my Twitter.
This has become my first somewhat complex hardware project and as of now I have assembled multiple printed circuit boards for the "display driver" and the "clock core". After fiddling with Espressif's development framework for a while the assembled hardware now actually works as a clock with internet time synchronization. :)

Main components on the Vfddriver
Vfddriver bill of materials (BOM)
32 components, 23 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | IVL2-7/5 IVL2-5_7 Diodes Inc. | IVL2-7_5 | U1 |
| 1 | LM4871MX/NOPB LM4871MX_NOPB Texas Instruments | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | LM2733YMF/NOPB LM2733YMF Espressif | SOT-23-5 | U3 |
| 1 | HV5812WG-G HV5812WG Maxim | SOIC-28W_7.5x17.9mm_P1.27mm | U4 |
| 1 | PREC040DBAN-M71RC Connection Header Sullins | PinHeader_1x08_P2.54mm_Vertical | J1 |
| 1 | 1N5819HW-7-F Vishay | D_SOD-123 | D1 |
| 1 | MMSZ4684T1G 3.3V Würth | D_SOD-123 | D2 |
| 1 | LBC3225T100MR 10µH | L_1210_3225Metric_Pad1.42x2.65mm_HandSolder | L1 |
| 1 | UMK212BBJ475KG-T 2.2µF Samsung | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C1 |
| 1 | UMK212BBJ475KG-T 4.7µF Samsung | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C2 |
| 1 | CC0805JRNPO9BN820 82pF Samsung | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C3 |
| 1 | CC0805KRX7R9BB103 10nF Samsung | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C4 |
| 2 | CL21B105KAFNNNG 1µF Yageo | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C5, C10 |
| 1 | UWX1C100MCL1GB 10µF Samsung | CP_Elec_4x5.4 | C6 |
| 2 | UCD1E470MCL1GS 47µF Samsung | CP_Elec_6.3x5.9 | C7, C8 |
| 1 | CL21B104KACNNNC 100nF Samsung | C_0805_2012Metric_Pad1.15x1.40mm_HandSolder | C9 |
| 2 | RC0805FR-0747KL 47kΩ Yageo | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R1, R14 |
| 1 | RC0805FR-0713KL 13kΩ Yageo | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R2 |
| 1 | RC0805FR-07240KL 240kΩ Yageo | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R3 |
| 5 | RC0805FR-0710KL 10kΩ Yageo | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R4, R5, R6, R7, R9 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RC0805FR-072K2L 2.2kΩ Yageo | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R8 |
| 2 | RC1206FR-0710RL 10Ω Yageo | R_1206_3216Metric_Pad1.42x1.75mm_HandSolder | R10, R11 |
| 2 | RC0805FR-07220RL 220Ω Yageo | R_0805_2012Metric_Pad1.15x1.40mm_HandSolder | R12, R13 |
Vfddriver design files
The KiCad project lives in the ansemjo/chronovfd repository on GitHub; these links point at the commit this page was built from.
Vfddriver: common questions
How big is the Vfddriver PCB?
The Vfddriver measures 75 × 40 mm and is 1.6002 mm thick.
How many components are on the Vfddriver?
32 components, from 23 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Vfddriver design files?
From the ansemjo/chronovfd repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Vfddriver design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which ansemjo chose for the repository.
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