2 layers87.6 × 63.5 mm
2 layers226.1 × 251.5 mm
LED8x8
freesurfer-rge/pcbStore for my PCB designs
- Size
- 226.1 × 251.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 214
- Nets
- 156
- Pads
- 734
- Tracks, vias
- 1,281, 39
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 20 Mar 2021
- Updated
- 3 Jul 2026
Overview
LED8x8 is an open-source printed circuit board by freesurfer-rge, from the freesurfer-rge/pcb repository on GitHub, published under the MIT licence. It is a 2-layer board of 226.1 × 251.5 mm with 214 parts on 156 nets, routed with 1,281 tracks and 39 vias.
It is built around the 74HCT540D, 74HCT574D and 74HC164, with the 74HCT138D, NE555P and 74HC00D among its other parts. Its parts include 86 diodes, 61 resistors, 24 capacitors, 20 ICs and 17 transistors.
Main components
6
74HCT540D
SO-20-300mil-40℃~+125℃ 1 13ns@4.5V,50pF 160uA 4.5V~5.5V 6mA 6mA 74HCT 8 Tri-State Unidirectional SO-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffer/Driver/Transceiver74HCT574D
SO-20-300mil-40℃~+125℃ 1 18ns@4.5V,50pF 3.5pF 3ns 4.5V~5.5V 5ns 69MHz 6mA 6mA 74HCT Series 8 8uA D-Type Rising Edge Tri-State SOIC-20-300mil Flip Flops ROHSNexperiaFlip Flops
74HC164
SOP-140℃~+70℃ 1 24ns@5V,16pF 2V~6V 74HC 8 Serial-to-Parallel SOP-14 Shift Registers ROHSGRShift Registers
74HCT138D
SO-16-40℃~+125℃ 160uA 20ns@4.5V,50pF 3/8 4.5V~5.5V 4mA 4mA 74HCT Decoder Single Supply SOIC-16 Signal Switches, Multiplexers, Decoders ROHSNexperiaSignal Switches / Encoders & Decoders / Multiplexers
NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters74HC00D
SOP-14-40℃~+125℃ 1.5V、3.15V、4.2V 1.9V、3.7V、5.9V 100mV、400mV、400mV 2 2V~6V 4 40uA 5.2mA 5.2mA 500mV~1.8V 74HC Series 7ns@6V,50pF NAND Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates
Parts
214| Qty | Value | Footprint | References |
|---|---|---|---|
| 67 | LED | LED_THT:LED_D5.0mm | D104, D201, D202, D203, D204, D205, D206, D207, D208, D209, D210, D211, D212, D213, D214, D215 +51 |
| 24 | R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R201, R202, R203, R204, R205, R206, R207, R208, R209, R210, R211, R212, R213, R214, R215, R216 +8 |
| 23 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R101, R102, R103, R104, R303, R305, R309, R401, R402, R403, R404, R405, R406, R407, R408, R409 +7 |
| 19 | LED | LED_THT:LED_D3.0mm | D101, D102, D103, D401, D402, D403, D404, D405, D406, D407, D408, D409, D410, D411, D412, D413 +3 |
| 11 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R304, R307, R308, R501, R502, R503, R504, R505, R506, R507, R508 |
| 10 | C | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C201, C401, C402, C403, C404, C405, C406, C407, C408, C409 |
| 9 | 2N3904 | Package_TO_SOT_THT:TO-92_Wide | Q209, Q210, Q211, Q212, Q213, Q214, Q215, Q216, Q301 |
| 8 | 2N3906 | Package_TO_SOT_THT:TO-92_Wide | Q201, Q202, Q203, Q204, Q205, Q206, Q207, Q208 |
| 8 | 74HCT574 | Package_DIP:DIP-20_W7.62mm_Socket | U401, U402, U403, U404, U405, U406, U407, U408 |
| 4 | 0.1u | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C501, C502, C601, C602 |
| 4 | MountingHole | MountingHole:MountingHole_2.7mm_M2.5 | H101, H102, H103, H104 |
| 3 | 0.1uF | Capacitor_THT:C_Disc_D4.3mm_W1.9mm_P5.00mm | C301, C303, C305 |
| 2 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R301, R302 |
| 2 | 4024 | Package_DIP:DIP-14_W7.62mm_Socket | U101, U303 |
| 2 | 74HC164 | Package_DIP:DIP-14_W7.62mm_Socket | U601, U602 |
| 2 | 74HCT138 | Package_DIP:DIP-16_W7.62mm_Socket | U201, U409 |
| 2 | NE555P | Package_DIP:DIP-8_W7.62mm_Socket | U302, U304 |
| 1 | 0.01F | Capacitor_THT:C_Disc_D3.4mm_W2.1mm_P2.50mm | C306 |
| 1 | 0.01uF | Capacitor_THT:C_Disc_D3.8mm_W2.6mm_P2.50mm | C304 |
| 1 | 0.1u | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C103 |
| 1 | 100k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R306 |
| 1 | 100u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C101 |
| 1 | 10uF | Capacitor_THT:CP_Radial_D4.0mm_P1.50mm | C307 |
| 1 | 1uF | Capacitor_THT:CP_Radial_D4.0mm_P1.50mm | C302 |
| 1 | 4081 | Package_DIP:DIP-14_W7.62mm_Socket | U102 |
| 1 | 74HC00 | Package_DIP:DIP-14_W7.62mm_Socket | U301 |
| 1 | 74HCT540 | Package_DIP:DIP-20_W7.62mm_Socket | U502 |
| 1 | 74LS138 | Package_DIP:DIP-16_W7.62mm_Socket | U501 |
| 1 | C | Capacitor_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm | C102 |
| 1 | Conn_01x05_Male | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J101 |
| 1 | SW_SPST | Button_Switch_THT:SW_PUSH_6mm | SW301 |
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Questions
How big is the LED8x8 PCB?
It measures 226.1 × 251.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the LED8x8 use?
214 parts, built around the 74HCT540D, 74HCT574D, 74HC164 and 74HCT138D. 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 LED8x8 KiCad files?
From the freesurfer-rge/pcb repository on GitHub, at the commit this page was made from: the board is LED 8x8/LED8x8.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the LED8x8 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).