2 layers165.2 × 114.6 mm
Web controlled relay board v2.0
ambadran/Free-Lance-Projects
repo for holding my free lance work
71 parts
2 layers93.7 × 103.5 mm
Led sign
ambadran/Free-Lance-Projectsrepo for holding my free lance work
- Size
- 93.7 × 103.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 89
- Nets
- 83
- Pads
- 250
- Tracks, vias
- 613, 0
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 29 Jun 2024
- Updated
- 13 Aug 2026
Overview
Led sign is an open-source printed circuit board by ambadran, from the ambadran/Free-Lance-Projects repository on GitHub. It is a 2-layer board of 93.7 × 103.5 mm with 89 parts on 83 nets, routed with 613 tracks and 0 vias.
It is built around the 74HC595, 74LS279P-E and NE555P, with the S8050 among its other parts. Its parts include 32 resistors, 19 transistors, 17 connectors, 7 capacitors and 5 ICs.
Main components
4
74HC595
SOP-16-40℃~+85℃ 1 100ns@5V,50pF 10MHz 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOP-16 Shift Registers ROHSGRShift Registers
74LS279P-E
DIP-16DIP-16 Latches ROHSRenesas ElectronicsLatches
NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters
S8050
SOT-23-55℃~+150℃ 1 NPN 100MHz 100nA 120 25V 300mW 500mA 5V 600mV NPN SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)
Parts
89| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8, R12, R13, R14, R15, R17, R18, R19, R20 +1 |
| 16 | JST2P | Connector_JST:JST_EH_B2B-EH-A_1x02_P2.50mm_Vertical | J1, J2, J3, J4, J5, J6, J7, J8, J9, J10, J11, J12, J13, J14, J15, J16 |
| 16 | Q_NPN_Darlington_BCE | Package_TO_SOT_THT:TO-126-3_Vertical | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13, Q14, Q15, Q16 |
| 8 | 5k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R22, R23, R24, R25, R26, R27, R28, R31 |
| 5 | 100uF | Capacitor_THT:CP_Radial_D5.0mm_P2.00mm | C1, C3, C4, C6, C7 |
| 4 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10, R11, R16, R29 |
| 3 | 1N5817 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D2, D3, D4 |
| 3 | MountingHole | MountingHole:MountingHole_3mm_Pad_TopBottom | H1, H3, H4 |
| 3 | S8050 | Package_TO_SOT_THT:TO-92_Inline_Wide | Q17, Q18, Q19 |
| 2 | 270 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R21, R33 |
| 1 | 0 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | Bridge1 |
| 1 | 10k | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | RV1 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R32 |
| 1 | 10nF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C5 |
| 1 | 220uF | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C2 |
| 1 | 74HC595 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U4 |
| 1 | 74HC595 | Package_DIP:DIP-16_W7.62mm_LongPads | U1 |
| 1 | 74LS279 | Package_DIP:DIP-16_W7.62mm_Socket_LongPads | U5 |
| 1 | LED | LED_THT:LED_D5.0mm | D1 |
| 1 | LM7805_TO220 | Package_TO_SOT_THT:TO-220-3_Vertical | U3 |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm | U2 |
| 1 | Power12V | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J17 |
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Questions
How big is the Led sign PCB?
It measures 93.7 × 103.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Led sign use?
89 parts, built around the 74HC595, 74LS279P-E, NE555P and S8050. 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 sign KiCad files?
From the ambadran/Free-Lance-Projects repository on GitHub, at the commit this page was made from: the board is led_sign/V1/circuit.kicad_pcb and its schematic distress_call_robot/Circuit/Circuit.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Led sign design in my own project?
Its repository states no licence, so its author keeps all rights: ask ambadran before reusing the design.