2 layers50.9 × 65.7 mm
LAMPED
Gabouin/LAMPED
A simple, desk-friendly LED “lamp” built around the LM3914 LED driver: a 10‑LED circular array that lights up progressively based on a potentiometer input.
18 parts2MIT
2 layers100.2 × 76.8 mm
- Size
- 100.2 × 76.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 27
- Nets
- 25
- Pads
- 71
- Tracks, vias
- 93, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 12 Apr 2026
- Updated
- 12 Apr 2026
Overview
T7EA is an open-source printed circuit board by captainflorex, from the captainflorex/TP7EA repository on GitHub. It is a 2-layer board of 100.2 × 76.8 mm with 27 parts on 25 nets, routed with 93 tracks and 0 vias.
It is built around the LM3914N-1. Its parts include 13 resistors, 10 diodes, 2 ICs and 1 capacitor.
Main components
1README
README.mdT7EA
Parts
27| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 220R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R1, R2, R3, R4, R5, R6, R7, R8, R9, R10 |
| 10 | LED | LED_THT:LED_D3.0mm_Clear | D1, D2, D3, D4, D5, D6, D7, D8, D9, D10 |
| 1 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R12 |
| 1 | 1K5 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R11 |
| 1 | 1µF | Capacitor_THT:CP_Radial_D8.0mm_P2.50mm | C1 |
| 1 | 2K2 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P15.24mm_Horizontal | R13 |
| 1 | Battery | Battery:BatteryHolder_ComfortableElectronic_CH273-2450_1x2450 | BT1 |
| 1 | LM35-LP | Package_TO_SOT_THT:TO-92_Inline | U1 |
| 1 | LM3914N | Package_DIP:DIP-18_W7.62mm | U2 |
Questions
How big is the T7EA PCB?
It measures 100.2 × 76.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the T7EA use?
27 parts, built around the LM3914N-1. 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 T7EA KiCad files?
From the captainflorex/TP7EA repository on GitHub, at the commit this page was made from: the board is T7EA.kicad_pcb and its schematic T7EA.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the T7EA design in my own project?
Its repository states no licence, so its author keeps all rights: ask captainflorex before reusing the design.
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