2 layers75 × 40 mm
Lcddriver
ansemjo/chronovfd
hardware project for a clock around a russian ivl2-5/7 vfd and an esp32-wroom module
25 parts13CERN-OHL-P-2.0
2 layers66 × 45.1 mm
A 4-digit 7-segment display module based on the NXP PCF8562 driver IC
- Size
- 66 × 45.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 21
- Nets
- 57
- Pads
- 177
- Tracks, vias
- 661, 155
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 24 Jan 2021
- Updated
- 26 Oct 2023
Overview
Lcd-7seg is an open-source printed circuit board by SomeInterestingUserName, from the SomeInterestingUserName/lcd-7seg repository on GitHub, published under the MIT licence. It is a 2-layer board of 66 × 45.1 mm with 21 parts on 57 nets, routed with 661 tracks and 155 vias.
It is built around the PCF8562TT/2 and LCD-S401C52TR. Its parts include 4 capacitors, 2 resistors, 1 IC and 1 connector. It belongs with the lEDs and displays boards of this library.
Main components
2README
README.mdlcd-7seg
A 4-digit 7-segment display module based on the NXP PCF8562 driver IC. The PCB fits a Lumex LCD-S401C52TR display. With the exception of Backplanes 2-4, all other pins of the PCF8562 are broken out to headers or jumpers to allow for evaluation of advanced features.
Note: The NXP datasheet currently lists the PCF8562 as "Not Recommended for New Designs". The PCF85162 (note the additional "1") is a drop-in replacement for this part. However, the PCF8562 (without the "1") is still widely available, and in fact appears to be available in larger quantities at the moment (as of January 2021).
Hardware Notes
- The PCB was designed to fit JLCPCB's design rules. Although a quick cross-check shows these rules are compatible with some other PCB fabs, please check that they meet your preferred PCB fab's specs.
- If PCBs are manufactured using the HASL (Hot-Air Solder Leveling) surface finish, small solder bumps may be left on the TSSOP footprint's pins. It is recommended to clean these with some solder wick to make IC alignment easier. This is only necessary for the PCF8562 (U1).
- This board can be hand-soldered, although some practice is recommended. All passives are 0805 size, and the PCF8562 can be quickly "drag-soldered" using plenty of flux. Be sure to closely inspect the PCF8562 pins for solder bridges and touch-up with solder wick as necessary.
- All 3-way jumpers must have one option selected for the module to function correctly. The default values are:
A0:0A1:0A2:0I2C ADDR:0x70OSC:INTVLCD:VDD
Datasheets (from mouser.com)
- PCF8562 (Driver IC)
- LCD-S401C52TR (LCD)
Parts
21| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | SolderJumper_3_Open | Jumper:SolderJumper-3_P2.0mm_Open_TrianglePad1.0x1.5mm | JP3, JP4, JP5, JP6, JP7, JP8 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_Pad_Via | H1, H2, H3, H4 |
| 2 | 0.1u | Capacitor_SMD:C_0805_2012Metric | C2, C4 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric | C1, C3 |
| 2 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP1, JP2 |
| 1 | Conn_01x07 | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J1 |
| 1 | LCD-S401C52TR | custom_components:S401C52TR | DISP1 |
| 1 | PCF8562 | Package_SO:TSSOP-48_6.1x12.5mm_P0.5mm | U1 |
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Questions
How big is the Lcd-7seg PCB?
It measures 66 × 45.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Lcd-7seg use?
21 parts, built around the PCF8562TT/2 and LCD-S401C52TR. 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 Lcd-7seg KiCad files?
From the SomeInterestingUserName/lcd-7seg repository on GitHub, at the commit this page was made from: the board is hw/LCD7Seg.kicad_pcb and its schematic hw/LCD7Seg.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Lcd-7seg design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).