OCXO Clock N
About the OCXO Clock N PCB
OCXO Clock N is an open source AVR/Arduino PCB design by Gavin-Watkins, published on GitHub. It is a 2-layer board measuring 165.1 × 114.3 mm, with 43 components from 16 distinct parts.
Its main chip is the 102010268, from the AVR/Arduino family. Other key parts include the 497-1492-5, 296-49590, 1528-1699 and 1528-1363. By type, the board carries 12 capacitors, 10 resistors, 8 modules, 4 connectors, 4 diodes and 3 ICs.
From the project
Circuits, details and code for an Arduino based clock that uses a 10 MHz OCXO as a reference.
Main components on the OCXO Clock N
OCXO Clock N bill of materials (BOM)
43 components, 16 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | 497-1492-5 LD1117V33C Digikey | TO-220-3_Vertical | U1, U2 |
| 1 | 296-49590 74HC191 Digikey | DIP-16_W7.62mm_LongPads | U3 |
| 1 | 102010268 Arduino_Nano_v2.x Digikey | Arduino_Nano | A1 |
| 6 | 1528-1699 Adafruit_Feather_Generic Digikey | Adafruit_Feather | A2, A3, A4, A5, A6, A7 |
| 1 | 1528-1363 9548_Module_N Digikey | 9548_Module_N | A8 |
| 1 | 2151-OX4120A-D3-5-10.000-3.3 OCXO-14 Digikey | Oscillator_DIP-14 | X1 |
| 1 | 1212-1114 Conn_01x07_Female Digikey | PinHeader_1x07_P2.54mm_Vertical | J1 |
| 1 | 350-80-164-00-001101 Conn_01x07_Male Digikey | PinSocket_1x07_P2.54mm_Vertical | J2 |
| 1 | 1212-1114 Conn_01x14_Female Digikey | Molex_KK-254_AE-6410-14A_1x14_P2.54mm_Vertical | J3 |
| 1 | 350-80-164-00-001101 Conn_01x14_Male Digikey | Molex_KK-254_AE-6410-14A_1x14_P2.54mm_Vertical | J4 |
| 1 | PEC12R-4215F-S0024 RotaryEncoder_Switch Digikey | RotaryEncoder_Bourns_Vertical_PEC12R-3xxxF-Sxxxx | SW1 |
| 4 | 160-1704 LED Digikey | LED_D3.0mm | D1, D2, D3, D4 |
| 5 | ESY107M025AE3AA 100u Digikey | CP_Radial_D7.5mm_P2.50mm | C1, C5, C6, C9, C11 |
| 7 | R82DC3100DQ50J 100n Digikey | C_Rect_L7.0mm_W2.5mm_P5.00mm | C2, C3, C4, C7, C8, C10, C12 |
| 2 | 13-MF0207FRE52-470R 470R Digikey | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2 |
| 8 | 13-MF0207FTE52-10K 10k Digikey | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R3, R4, R5, R6, R7, R8, R9, R10 |
OCXO Clock N design files
The KiCad project lives in the Gavin-Watkins/OCXO_Clock repository on GitHub; these links point at the commit this page was built from.
- LayoutOCXO_Clock_N.kicad_pcb
- SchematicOCXO_Clock_N.kicad_sch
- BOMOCXO_Clock_BOM.xls
OCXO Clock N: common questions
What microcontroller does the OCXO Clock N use?
The OCXO Clock N is built around the 102010268, from the AVR/Arduino family.
How big is the OCXO Clock N PCB?
The OCXO Clock N measures 165.1 × 114.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the OCXO Clock N?
43 components, from 16 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 OCXO Clock N design files?
From the Gavin-Watkins/OCXO_Clock repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the OCXO Clock N design in my own project?
The repository has no license, so all rights stay with Gavin-Watkins. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the OCXO Clock N without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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