Clock Addon
About the Clock Addon PCB
Clock Addon is an open source PCB design by Robert-Mones, published on GitHub. It is a 6-layer board measuring 16.5 × 21.6 mm, with 7 components from 7 distinct parts.
Other key parts include the 74HC541. By type, the board carries 2 capacitors, 2 resistors, 1 IC, 1 connector and 1 diode.
It belongs with the displays & leds and retro computing designs in this gallery.
From the project
A reverse Polish notation calculator with added features such as comparisons, branching, and custom recursive operators taken from the Clac project from the 15-122 course at Carnegie Mellon University. The project is built around a 6502 microprocessor with a custom architecture to reduce CPU load by making peripherals operate asyncronously.
Main components on the Clock Addon
Clock Addon bill of materials (BOM)
7 components, 7 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74HC541 NE555P | DIP-8_W7.62mm | U1 |
| 1 | CONN_01X10_PIN Conn_01x06_Pin | PinHeader_2x03_P2.54mm_Vertical | J2 |
| 1 | D_Zener | D_A-405_P7.62mm_Horizontal | D1 |
| 1 | 10UF C | C_Disc_D5.0mm_W2.5mm_P2.50mm | C1 |
| 1 | 1UF C | C_Disc_D5.0mm_W2.5mm_P2.50mm | C2 |
| 1 | 10K R | R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1 |
| 1 | R | R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R2 |
Clock Addon design files
The KiCad project lives in the Robert-Mones/Claculator repository on GitHub; these links point at the commit this page was built from.
Clock Addon: common questions
How big is the Clock Addon PCB?
The Clock Addon measures 16.5 × 21.6 mm, has 6 copper layers and is 1.6 mm thick.
How many components are on the Clock Addon?
7 components, from 7 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 Clock Addon design files?
From the Robert-Mones/Claculator 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 Clock Addon design in my own project?
The repository has no license, so all rights stay with Robert-Mones. Use it as a reference, and ask the author before reusing the design.
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