2 layers88 × 32 mm
Display board
n1kdo/BandSelector
IOT BandSelector (also known as a Band Decoder) works with Antenna Switch Controller to perform automated antenna selection on band change
14 parts3
2 layers105.5 × 77.6 mm
BandSelector
n1kdo/BandSelector3IOT BandSelector (also known as a Band Decoder) works with Antenna Switch Controller to perform automated antenna selection on band change
- Size
- 105.5 × 77.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 63
- Nets
- 65
- Pads
- 226
- Tracks, vias
- 216, 1
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 15 Sep 2024
- Updated
- 30 Oct 2026
Overview
BandSelector is an open-source printed circuit board by n1kdo, from the n1kdo/BandSelector repository on GitHub. It is a 2-layer board of 105.5 × 77.6 mm with 63 parts on 65 nets, routed with 216 tracks and 1 via.
It is built around the L7805 and BAT43. Its parts include 11 resistors, 10 capacitors, 10 diodes, 7 inductors and 3 connectors. It belongs with the radio and wireless boards and the RP2040 boards of this library.
Main components
2
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BAT43
DO-204AH-65℃~+125℃ 1 Independent 1V@0.2A 200mA 30V 4A 500nA@25V DO-204AH Schottky Diodes ROHSSTMicroelectronicsSchottky Diodes
README
kicad/DisplayBoard/README.mddisplay-board
This is a carrier for a 2x20 LCD display. It has 4 pushbuttons that are pull-to-ground.
The module is intended to mount in the front part of the cover of a Hammond 1591XXSFLBK enclosure. Note that I have not actually tried this yet.
The board has a cut-out for the visible part of the display, and holes marking all the pushbutton actuators. The intent is that a bare board can be used as a template to mark the enclosure for drilling.
3d mockup from Kicad:
Prototype 1:
Design PDFs
- cad_models contains the downloaded vendor assets for symbols, footprints, 3-d models
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | TestPoint | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP1, TP3, TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11, TP12 |
| 7 | .1uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C1, C2, C3, C4, C5, C6, C7 |
| 7 | 100uH | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | L1, L2, L3, L4, L5, L6, L7 |
| 7 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2, R3, R4, R5, R6, R7, R9 |
| 6 | BAT43 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D6, D7 |
| 4 | MountingHole | MountingHole:MountingHole_3.5mm | H1, H2, H3, H4 |
| 2 | 100 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R8 |
| 2 | 2.2 | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C9, C10 |
| 2 | 2N7000 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2 |
| 1 | 1N4002 | Diode_THT:D_DO-15_P10.16mm_Horizontal | D8 |
| 1 | 1N5819 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D5 |
| 1 | 220 | Capacitor_THT:CP_Radial_D8.0mm_P3.50mm | C8 |
| 1 | 330 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10 |
| 1 | 470 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R11 |
| 1 | 75915416LF | Library:75915416LF | J3 |
| 1 | DE15_Plug_HighDensity_MountingHoles | Library:AMPHENOL_10090926-P154XLF_N1KDO | J1 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
| 1 | LED | LED_THT:LED_D3.0mm | D9 |
| 1 | POWER | Library:SWITCHCRAFT_RAPC722X | J2 |
| 1 | PicoW | Library:RPi_PicoW_SMD_TH | U1 |
| 1 | Polyfuse | Library:RUEF090 | F1 |
| 1 | RED LED | LED_THT:LED_D3.0mm | D10 |
| 1 | ~ | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP2 |
The 62 most common of 63 parts.
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Questions
How big is the BandSelector PCB?
It measures 105.5 × 77.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BandSelector use?
63 parts, built around the L7805 and BAT43. 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 BandSelector KiCad files?
From the n1kdo/BandSelector repository on GitHub, at the commit this page was made from: the board is kicad/BandSelector/BandSelector.kicad_pcb and its schematic kicad/BandSelector/BandSelector.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BandSelector design in my own project?
Its repository states no licence, so its author keeps all rights: ask n1kdo before reusing the design.