2 layers152 × 88 mm
RFBitBangSMT
profdc9/RFBitBanger
A QRP digital transceiver created from readily available parts for off-the-grid maintenance
271 parts222
2 layers100 × 70 mm
Radio
eccnil/radiofmRaw fm receiver radio. (electronics)
- Size
- 100 × 70 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 39
- Nets
- 25
- Pads
- 91
- Tracks, vias
- 245, 0
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 10 Jun 2025
- Updated
- 12 Jun 2025
Overview
Radio is an open-source printed circuit board by eccnil, from the eccnil/radiofm repository on GitHub. It is a 2-layer board of 100 × 70 mm with 39 parts on 25 nets, routed with 245 tracks and 0 vias.
It is built around the LM386. Its parts include 12 capacitors, 9 resistors, 4 transistors, 3 inductors and 1 IC. It belongs with the radio and wireless boards of this library.
Main components
1Parts
39| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | BF324 | Package_TO_SOT_THT:TO-92L_HandSolder | Q1, Q2, Q3, Q4 |
| 3 | 18k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2, R8, R9 |
| 2 | 10uf | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C9, C10 |
| 1 | 0.2v | TestPoint:TestPoint_Keystone_5019_Miniature | TP2 |
| 1 | 0.66v | TestPoint:TestPoint_Keystone_5019_Miniature | TP3 |
| 1 | 1.8k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 1 | 10 turns / 0.5mm SWG25 d = 3mm | Inductor_THT:L_Axial_L11.0mm_D4.5mm_P15.24mm_Horizontal_Fastron_MECC | L1 |
| 1 | 100nf | Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm | C11 |
| 1 | 100pf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C5 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
| 1 | 10k | Potentiometer_THT:Potentiometer_Runtron_RM-065_Vertical | RV1 |
| 1 | 12 turns / 0.5mm SWG25 d=5mm | Inductor_THT:L_Axial_L9.5mm_D4.0mm_P12.70mm_Horizontal_Fastron_SMCC | L3 |
| 1 | 12 turns / 0.5mm SWG25 d=5mm | Inductor_THT:L_Axial_L13.0mm_D4.5mm_P15.24mm_Horizontal_Fastron_HCCC | L2 |
| 1 | 1k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P5.08mm_Vertical | R6 |
| 1 | 1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5 |
| 1 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3 |
| 1 | 220nf | Capacitor_THT:C_Disc_D7.5mm_W4.4mm_P5.00mm | C7 |
| 1 | 22k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10 |
| 1 | 3.4v | TestPoint:TestPoint_Pad_D2.0mm | TP1 |
| 1 | 4.7nf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2 |
| 1 | 4.7nf | Capacitor_THT:C_Disc_D7.5mm_W4.4mm_P5.00mm | C99 |
| 1 | 4.7pf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C3 |
| 1 | 470uf | Capacitor_THT:CP_Radial_D8.0mm_P3.80mm | C12 |
| 1 | 6.8nf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C6 |
| 1 | 68pf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1 |
| 1 | 6v | Connector_Wire:SolderWire-0.25sqmm_1x02_P4.5mm_D0.65mm_OD2mm_Relief | BT1 |
| 1 | <14pf | Capacitor_SMD:CP_Elec_6.3x4.5 | C4 |
| 1 | Antenna | Connector:Banana_Jack_1Pin | AE1 |
| 1 | LM386 | Package_DIP:DIP-8_W7.62mm_LongPads | U1 |
| 1 | SW_Slide_DPDT | Button_Switch_THT:SW_Push_2P2T_Toggle_CK_PVA2OAH5xxxxxxV2 | SW1 |
| 1 | Speaker | Connector_Wire:SolderWire-0.25sqmm_1x02_P4.5mm_D0.65mm_OD2mm_Relief | LS1 |
| 1 | preamp | TestPoint:TestPoint_Keystone_5019_Miniature | TP5 |
| 1 | sound | TestPoint:TestPoint_Keystone_5019_Miniature | TP4 |
Questions
How big is the Radio PCB?
It measures 100 × 70 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Radio use?
39 parts, built around the LM386. 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 Radio KiCad files?
From the eccnil/radiofm repository on GitHub, at the commit this page was made from: the board is Radio.kicad_pcb and its schematic Radio.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Radio design in my own project?
Its repository states no licence, so its author keeps all rights: ask eccnil before reusing the design.
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