Cpy Freq Reference
About the Cpy Freq Reference PCB
Cpy Freq Reference is an open source PCB design by molendijk, published on GitHub. It is a 2-layer board measuring 85 × 115 mm, with 91 components from 68 distinct parts.
Other key parts include the LT1085-ADJ, ERA-1SM+, ERA-5SM+, 74LVC74 and 551MLFT. By type, the board carries 33 resistors, 25 capacitors, 13 connectors, 7 ICs, 4 test points and 2 transistors.
It belongs with the rf & radio and dev boards & breakouts designs in this gallery.
From the project
KiCad Design of a 10MHz Frequency reference distributor and derived 25MHz distributor.
This hardware project is intended for people posessing a 10MHz sinusoidal reference oscillator (GPS DO / Rubidium Source) but require a 25MHz reference for use with an SDR (Adalm-Pluto), ADF4351 (Evaluation board) or a LNB (modified Bulls-Eye).
https://www.analog.com/en/resources/evaluation-hardware-and-software/evaluation-boards-kits/adalm-pluto.html https://github.com/molendijk/QO100LOADF4351_Loader https://3b8mars.org/wp-content/uploads/2023/10/Bulleye-LNB-modification-for-external-clocking-updated-Oct2023.pdf
Main components on the Cpy Freq Reference
Cpy Freq Reference bill of materials (BOM)
91 components, 68 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LT1085-ADJ 74LVC74 | SSOP-8_2.95x2.8mm_P0.65mm | U3 |
| 1 | ERA-1SM+ LT1085-ADJ | TO-220-3_Vertical | U4 |
| 1 | ERA-5SM+ 551MLFT | SOIC-8_5.3x6.2mm_P1.27mm | U5 |
| 1 | LT1085-ADJ 551MLFT | SOIC-8_5.3x6.2mm_P1.27mm | U6 |
| 1 | 74LVC74 LT1085-ADJ | TO-220-3_Vertical | U7 |
| 1 | 551MLFT LT1085-ADJ | TO-220-3_Vertical | U8 |
| 1 | 551MLFT | SOIC-8_5.3x6.2mm_P1.27mm | U9 |
| 2 | 2N2222 | TO-92_Inline | Q1, Q2 |
| 1 | MHz 50 LPF | SMA_Amphenol_132289_EdgeMount | J1 |
| 4 | MHz 25 | SMA_Amphenol_132289_EdgeMount | J2, J4, J7, J9 |
| 1 | MHz 10 LPF | SMA_Amphenol_132289_EdgeMount | J3 |
| 1 | Jack-DC | BarrelJack_Horizontal | J5 |
| 1 | CONN_02X07_ODD_EVEN MHz 50 | SMA_Amphenol_132289_EdgeMount | J6 |
| 1 | Conn_02x07_Odd_Even | PinHeader_2x07_P2.54mm_Vertical | J8 |
| 3 | MHz 10 | SMA_Amphenol_132289_EdgeMount | J10, J11, J12 |
| 1 | MHz 10 Source | SMA_Amphenol_132289_EdgeMount | J13 |
| 1 | MHZ50_A | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP5 |
| 1 | MHZ50_B | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP6 |
| 2 | Gnd | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP7, TP8 |
| 1 | Gnd | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP_GND1 |
Show 48 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | +3.3V | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP_P3V3 |
| 1 | +5V | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP_P5V1 |
| 1 | +15V | TestPoint_THTPad_1.5x1.5mm_Drill0.7mm | TP_P15V1 |
| 1 | LED | LED_D3.0mm | D1 |
| 2 | TCCH-80+ | Minicircuits_GU1604 | L1, L2 |
| 1 | 10NF 10nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | 100NF 10nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2 |
| 1 | 39NF 10nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3 |
| 2 | 39NF 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C4, C5 |
| 1 | 47UF 10nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C6 |
| 1 | 22UF 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C7 |
| 1 | 39NF 10uF | CP_EIA-7343-31_Kemet-D_HandSolder | C8 |
| 2 | 22UF 47uF | CP_EIA-7343-31_Kemet-D_HandSolder | C9, C10 |
| 1 | 47UF 47uF | CP_EIA-7343-31_Kemet-D_HandSolder | C11 |
| 1 | 39NF 22uF | CP_EIA-7343-31_Kemet-D_HandSolder | C12 |
| 1 | 1UF 22uF | CP_EIA-7343-31_Kemet-D_HandSolder | C13 |
| 1 | 10NF 22uF | CP_EIA-7343-31_Kemet-D_HandSolder | C14 |
| 1 | 10NF 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C15 |
| 1 | 10NF 39nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C16 |
| 1 | 1UF 1uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C17 |
| 2 | 39NF 39nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C18, C22 |
| 3 | 100NF 39nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C19, C21, C23 |
| 1 | 39NF 1uF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C20 |
| 1 | 47UF 39nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C24 |
| 1 | 10UF 39nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C25 |
| 1 | 220R 300 | R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R1 |
| 1 | 330R 160 | R_2512_6332Metric_Pad1.40x3.35mm_HandSolder | R2 |
| 1 | 100 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R3 |
| 3 | 100 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R4, R22, R23 |
| 6 | 30 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R5, R7, R8, R25, R26, R27 |
| 1 | 100 30 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6 |
| 2 | 5K1 30 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R9, R24 |
| 2 | 5k1 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R10, R28 |
| 1 | 2k | Potentiometer_Bourns_3299W_Vertical | R11 |
| 1 | 500R 120R | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R12 |
| 1 | 120R 500R | Potentiometer_Bourns_3299W_Vertical | R13 |
| 1 | 120R | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R14 |
| 1 | 500R | Potentiometer_Bourns_3299W_Vertical | R15 |
| 1 | 120R | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R16 |
| 1 | 500R 30 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R17 |
| 1 | 120R 30 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R18 |
| 1 | 300 30 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R19 |
| 1 | 160 30 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R20 |
| 1 | 100 5k | Potentiometer_Bourns_3299W_Vertical | R21 |
| 1 | 5k | Potentiometer_Bourns_3299W_Vertical | R29 |
| 1 | 100 00 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R30 |
| 2 | 00 | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R31, R32 |
| 1 | 330R | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R33 |
Cpy Freq Reference design files
The KiCad project lives in the molendijk/Frequency-Reference repository on GitHub; these links point at the commit this page was built from.
Cpy Freq Reference: common questions
How big is the Cpy Freq Reference PCB?
The Cpy Freq Reference measures 85 × 115 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Cpy Freq Reference?
91 components, from 68 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Cpy Freq Reference design files?
From the molendijk/Frequency-Reference repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Cpy Freq Reference design in my own project?
The repository has no license, so all rights stay with molendijk. Use it as a reference, and ask the author before reusing the design.
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