6 layers313 × 259.5 mm
Open8-vga motherboard
adham404/Open8-VGA
An 8-bit computer from 74HC logic: microcoded CPU, VGA, PS/2, on-board editor and assembler. Play it in your browser.
322 parts3MIT
2 layers139.8 × 88.3 mm
LED Driver
EZam1992/555_Timer_Boards_PCBAThe 555 Timer Board is a beginner-friendly electronics project designed to introduce the author to the process of designing and manufacturing printed circuit boards (PCBs).
- Size
- 139.8 × 88.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 55
- Nets
- 40
- Pads
- 158
- Tracks, vias
- 171, 1
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 6 Apr 2025
- Updated
- 3 May 2025
Overview
LED Driver is an open-source printed circuit board by EZam1992, from the EZam1992/555_Timer_Boards_PCBA repository on GitHub. It is a 2-layer board of 139.8 × 88.3 mm with 55 parts on 40 nets, routed with 171 tracks and 1 via.
It is built around the CD74HC138E, MCP1827S-3302E/AB and SN74HC393N. Its parts include 13 resistors, 9 diodes, 7 capacitors, 4 ICs and 1 connector.
Main components
3
CD74HC138E
DIP-16-55℃~+125℃ 13ns@5V,15pF 2V~6V 5.2mA 74HC 8uA Decoder Single Supply DIP-16 Signal Switches, Multiplexers, Decoders ROHSTexas InstrumentsSignal Switches, Multiplexers, Decoders
MCP1827S-3302E/AB
TO-220-40℃~+125℃ 1 1.5A 3.3V 600mV@(1.5A) 60dB@(100Hz) 6V Fixed Over Current Protection Positive TO-220 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
SN74HC393N
DIP-14-40℃~+85℃ 2 2V~6V 36MHz Asynchronous Divide-by-2 Falling Edge Up Counter DIP-14 Counters, Dividers ROHSTexas InstrumentsCounters, Dividers
README
README.md555 Timer Board
Overview
The 555 Timer Board is a beginner-friendly electronics project designed to introduce the author to the process of designing and manufacturing printed circuit boards (PCBs). Using the versatile 555 timer IC, this board provides practical experience with electronic circuit design and real-world prototyping.
Created by Erick Stanley Zamora
erickstanleyzamora.com
Parts
55| Qty | Value | Footprint | References |
|---|---|---|---|
| 14 | TestPoint | TestPoint:TestPoint_Loop_D2.50mm_Drill1.0mm_LowProfile | TP2, TP5, TP6, TP7, TP8, TP9, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17 |
| 9 | LED | LED_THT:LED_D5.0mm | D1, D2, D3, D4, D5, D6, D7, D8, D9 |
| 8 | 220 Ohms | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R7, R8, R9, R10, R11, R12, R13, R14 |
| 5 | 0.1uF | Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm | C3, C4, C5, C6, C7 |
| 4 | MountingHole | MountingHole:MountingHole_4.3mm_M4_Pad_Via | H1, H2, H3, H4 |
| 2 | 1K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R4, R6 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_2.0x2.0mm | TP1, TP3 |
| 1 | 100 Ohms | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R1 |
| 1 | 10K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R3 |
| 1 | 1825255-1 | Personal Library:SW_1825255-1 | S1 |
| 1 | 1uF | Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm | C1 |
| 1 | 220K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R2 |
| 1 | 4.7uF | Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm | C2 |
| 1 | CD74HC138E | Personal Library:CD74HC138E | U4 |
| 1 | MCP1827S-3302E/AB | Personal Library:MCP1827S-3302E | U1 |
| 1 | SN74HC393N | Personal Library:SN74HC393N | U3 |
| 1 | ~ | Package_DIP:DIP-8_W10.16mm | U2 |
| 1 | ~ | Personal Library:Keystone_2479 | J1 |
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Questions
How big is the LED Driver PCB?
It measures 139.8 × 88.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the LED Driver use?
55 parts, built around the CD74HC138E, MCP1827S-3302E/AB and SN74HC393N. 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 LED Driver KiCad files?
From the EZam1992/555_Timer_Boards_PCBA repository on GitHub, at the commit this page was made from: the board is LED-Driver.kicad_pcb and its schematic Decoder.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the LED Driver design in my own project?
Its repository states no licence, so its author keeps all rights: ask EZam1992 before reusing the design.