2 layers60 × 50 mm
Discrete PLL
adasbl/Discrete-PLL-pcb
Discrete PLL (Phase-Locked Loop) design implemented in KiCad
59 parts
2 layers57 × 57.3 mm
- Size
- 57 × 57.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 59
- Nets
- 34
- Pads
- 159
- Tracks, vias
- 330, 52
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 14 May 2025
- Updated
- 26 Apr 2026
Overview
PLL is an open-source printed circuit board by codecherr, from the codecherr/PLL_PCB repository on GitHub. It is a 2-layer board of 57 × 57.3 mm with 59 parts on 34 nets, routed with 330 tracks and 52 vias.
It is built around the CD4030BE, CD4148WTP and BC846, with the BC857 among its other parts. Its parts include 16 resistors, 15 connectors, 12 capacitors, 5 transistors and 4 diodes.
Main components
4
CD4030BE
PDIP-14-55℃~+125℃ 1.5V~4V 100ns@15V,50pF 1uA 3.4mA 3.4mA 3.5V~11V 3V~18V 4 4000B Series XOR Gate PDIP-14 Logic Gates ROHSTexas InstrumentsLogic Gates
CD4148WTP
0603Switching DiodesYONGYUTAI
BC846
SOT-23-65℃~+150℃ 1 NPN 100mA 110 15nA 250mW 400mV 65V 6V 770MHz NPN SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)BC857
SOT-231 PNP 100MHz 100mA 15nA 200mW 45V 5V 650mV 800 PNP SOT-23 Bipolar (BJT) ROHSSTMicroelectronicsBipolar (BJT)
README
README.mdPLL Loop project for CHIP
Parts
59| Qty | Value | Footprint | References |
|---|---|---|---|
| 13 | 10k | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13 |
| 6 | PIN2 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2, J4, J5, J6, J7, J8 |
| 6 | PIN4 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J10, J11, J12, J13, J14, J15 |
| 5 | 10nF | Capacitor_SMD:C_0603_1608Metric | C1, C3, C10, C11, C12 |
| 4 | 100nF | Capacitor_SMD:C_0603_1608Metric | C6, C7, C8, C9 |
| 4 | CD4148WT | Diode_SMD:D_0603_1608Metric | D1, D2, D3, D4 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3_DIN965 | H1, H2, H3, H4 |
| 3 | 1uF | Capacitor_SMD:C_0603_1608Metric | C2, C4, C5 |
| 3 | BC846 | Package_TO_SOT_SMD:SOT-23 | Q3, Q4, Q5 |
| 3 | PIN3 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1, J3, J9 |
| 2 | 33k | Resistor_SMD:R_0603_1608Metric | R14, R15 |
| 2 | BC857 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 1 | 10R | Resistor_SMD:R_0603_1608Metric | R16 |
| 1 | 47k | moje_foot:potencjo CE14 VA12.5 | RV1 |
| 1 | CD4030B | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U2 |
| 1 | TL074 | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U1 |
Questions
How big is the PLL PCB?
It measures 57 × 57.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the PLL use?
59 parts, built around the CD4030BE, CD4148WTP, BC846 and BC857. 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 PLL KiCad files?
From the codecherr/PLL_PCB repository on GitHub, at the commit this page was made from: the board is PLL.kicad_pcb and its schematic PLL.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the PLL design in my own project?
Its repository states no licence, so its author keeps all rights: ask codecherr before reusing the design.
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