Ds3231
risejohan·2Bit·module RTC/ds3231/ds3231.kicad_pcb
About the Ds3231 PCB
Ds3231 is an open source PCB design by risejohan, published on GitHub. It is a 2-layer board measuring 38 × 28.6 mm, with 13 components from 11 distinct parts.
Other key parts include the AT24CS32-SSHM and DS3231M. By type, the board carries 4 resistors, 2 ICs, 2 connectors, 2 diodes, 2 capacitors and 1 battery holder.
From the project
In this repo we can see some designs with free use for the community, 2 Bit electronic
Be able to use the designs of the common modules to have available and apply to electronic designs.
The RTC (Real Time Clock) or Real Time clock are the ideal solution when we need to integrate time measurements to our projects. The RTCs are very low consumption so they can be powered by batteries and thus not lose synchronization. While microcontrollers have internal counters, these are not as accurate as a dedicated RTC

Main components on the Ds3231
Ds3231 bill of materials (BOM)
13 components, 11 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AT24CS32-SSHM | SOIC-8_3.9x4.9mm_P1.27mm | U1 |
| 1 | DS3231M | SOIC-16W_7.5x10.3mm_P1.27mm | U2 |
| 1 | Conn_01x06_Male | PinSocket_1x06_P2.54mm_Vertical | J1 |
| 1 | Conn_01x04_Male | PinSocket_1x04_P2.54mm_Vertical | J2 |
| 1 | 2032 | BatteryHolder_Keystone_107_1x23mm | BT1 |
| 1 | 1N4148W | D_SOD-123 | D1 |
| 1 | LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D2 |
| 2 | 100nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 1 | 220R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 330R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 2 | Rarray | R_Array_Convex_4x0603 | R3, R4 |
Ds3231 design files
The KiCad project lives in the risejohan/2Bit repository on GitHub; these links point at the commit this page was built from.
Ds3231: common questions
How big is the Ds3231 PCB?
The Ds3231 measures 38 × 28.6 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Ds3231?
13 components, from 11 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 Ds3231 design files?
From the risejohan/2Bit repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Ds3231 design in my own project?
The repository has no license, so all rights stay with risejohan. Use it as a reference, and ask the author before reusing the design.