LCD Driver Board
About the LCD Driver Board
LCD Driver Board is an open source PCB design by ansemjo, published on GitHub under the CERN-OHL-P-2.0 license. It is a 2-layer board measuring 75 × 40 mm, with 20 components from 16 distinct parts.
Other key parts include the AP2114H-3.3TRG1, SN74HCT245PWR and 2022. By type, the board carries 5 capacitors, 3 connectors, 3 resistors, 2 ICs, 2 switches and 2 diodes.
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
This isn't entirely my own design and is instead heavily based on David Johnson-Davies' "Low-Power LCD Clock" design on Technoblogy (archived: page, firmware). This was created shortly after the vfddriver v2 and was meant to use the same physical format and I2C protocol to be a drop-in replacement. In practice, I haven't really bothered to write a separate firmware and used it as a standalone clock with David's firmware instead.
Main components on the LCD Driver Board
LCD Driver Board bill of materials (BOM)
20 components, 16 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AP2114H-3.3TRG1 AVR32DB48 Diodes Inc. | TQFP-48_7x7mm_P0.5mm | U1 |
| 1 | SN74HCT245PWR LCD-S401C52TR Texas Instruments | DE119-XX-XX | U2 |
| 1 | 2022 | ahoi | A1 |
| 1 | ECS-.327-12.5-13FLX-C 32.768kHz 12.5pF ECS Inc. | Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | PREC040DBAN-M71RC Header Sullins | PinHeader_1x05_P2.54mm_Vertical | J1 |
| 1 | PRPC040DAAN-RC UPDI Sullins | UPDI_PogoProg | J2 |
| 1 | 20021121-00010C4LF I2C Amphenol | JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J3 |
| 1 | 1058 Coin Cell Keystone | BatteryHolder_Keystone_3034_1x20mm | BT1 |
| 2 | CKN12221-1 C&K PTS526 C&K | SW_PTS526_SM08_SMTR2_LFS | SW1, SW2 |
| 1 | VEMD1060X01 LED Vishay | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D1 |
| 1 | 150080SS75000 1N5819HW Würth | D_SOD-123 | D2 |
| 2 | CL21A475KAQNNNE 20pF Samsung | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2 |
| 2 | UMK212BBJ475KG-T 100nF Samsung | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C4 |
| 1 | UMK212BBJ475KG-T 1µF Samsung | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C5 |
| 2 | RC0805FR-0710KL 10kΩ Yageo | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2 |
| 1 | RC0805FR-0710KL 660Ω Yageo | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
LCD Driver Board design files
The KiCad project lives in the ansemjo/chronovfd repository on GitHub; these links point at the commit this page was built from.
LCD Driver Board: common questions
How big is the LCD Driver Board?
The LCD Driver Board measures 75 × 40 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the LCD Driver Board?
20 components, from 16 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 LCD Driver Board 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 LCD Driver Board design in my own project?
Yes, under the terms of its CERN-OHL-P-2.0 license, which ansemjo chose for the repository.
More boards in chronovfd
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Vfddriver
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