Real-time clock (RTC)
clk.rtc
BOM rule hits · not reviewed — A hit means a BOM line matched this category's rules (ruleset 1.0.1+12960cbec977). It is a lead to read, not a located or reviewed circuit; several lines in one category are not several circuits.
Selection parameter template (suggestion)
What one usually states when choosing a circuit of this kind — not the parameters of any design or module listed here, and never a filter.
| Parameter | Suggested range or common values | Where it comes from |
|---|---|---|
| Accuracy (ppm)Decisive | 2 to 20 ppm | This category's own |
| InterfaceImportant | I2CSPI | This category's own |
| Built-in crystalImportant | Yes / no | This category's own |
| Backup current (nA)Important | 40 to 3,000 nA | This category's own |
| Alarm / interruptFor reference | Yes / no | This category's own |
In the parent's template, not in this one: Frequency, Frequency accuracy, Output type, Operating voltage
Template version 1.0.1+3e52bcb40ed6 (separate from the rules)
Design files with a hit (157)
- tinta - inki
BOM014222 · inki-a895cb86
BOM · 22 lineskicad39 starsProject type: 接口转换及调试器
Key parts: DS3231M, BMP581, RV-3028-C7
Function hits: Real-time clock (RTC), E-paper display, Touch keys / touchscreen / gesture
Why it matched Real-time clock (RTC): U1,U3Licence Apache — as the catalogue declares it, not verified
- NTP based digital clock panel
BOM001209 · 1
BOM · 46 lineskicadKey parts: ENC28J60, ULN2803A, ATmega328-AU
Function hits: Real-time clock (RTC), 8-bit MCU (AVR / PIC / 8051 / STM8), Relay / load driver (ULN2003 / MOSFET driver)
Why it matched Real-time clock (RTC): U3,U4Licence not stated in the catalogue
- tinta
BOM006482 · legacy
BOM · 22 lineskicadProject type: 智能硬件
Key parts: DS3231M, BMP581, RV-3028-C7
Function hits: Real-time clock (RTC), E-paper display, Touch keys / touchscreen / gesture
Why it matched Real-time clock (RTC): U1,U3Licence not stated in the catalogue
- dacha - pi-rack-addon
BOM013310 · pi-rack-addon-4d42179
BOM · 20 lineskicad398 starsProject type: 接口转换及调试器
Key parts: AG5300, DS3231MZ, SLS32AIA010MSUSON10XTMA2
Function hits: Real-time clock (RTC), Addressable RGB LED (WS2812 etc.), Secure element / crypto chip / TPM
Why it matched Real-time clock (RTC): U2Licence CERN-OHL-P-2.0 — as the catalogue declares it, not verified
- sportiduino - sportiduino-base
BOM014530 · sportiduino-base-0f9e4795
BOM · 30 lineskicad78 starsProject type: 接口转换及调试器
Function hits: Real-time clock (RTC), 8-bit MCU (AVR / PIC / 8051 / STM8), EEPROM
Why it matched Real-time clock (RTC): D3,D3Licence GNU — as the catalogue declares it, not verified
- tinta - inki-l2
BOM014414 · inki-l2-a895cb86
BOM · 28 lineskicad39 starsProject type: 接口转换及调试器
Key parts: BMP581, RV-3028, ST25
Function hits: Real-time clock (RTC), E-paper display, Barometric / pressure measurement
Why it matched Real-time clock (RTC): U4Licence Apache — as the catalogue declares it, not verified
- project_oak - project-oak-main-brd-v0
BOM014759 · project-oak-main-brd-v0-9e24250c
BOM · 18 lineskicad29 starsProject type: Microchip
Key parts: ATmega328PB-MU, RX8130CE
Function hits: Real-time clock (RTC), 8-bit MCU (AVR / PIC / 8051 / STM8), Buttons / switches
Why it matched Real-time clock (RTC): U2Licence MIT — as the catalogue declares it, not verified
- project_oak - project-oak-main-brd-v0-1
BOM014760 · project-oak-main-brd-v0-1-9e24250c
BOM · 19 lineskicad29 starsProject type: Microchip
Key parts: ATmega328PB-MU, RV-8263-C7-32.768KHZ-20PPM-TA-QC
Function hits: Real-time clock (RTC), 8-bit MCU (AVR / PIC / 8051 / STM8), Buttons / switches
Why it matched Real-time clock (RTC): U2Licence MIT — as the catalogue declares it, not verified
- zxuno1010-board - zxuno1010
BOM014887 · zxuno1010-52e999df
BOM · 69 lineskicad23 starsProject type: 接口转换及调试器
Key parts: ESP-12F, IS61WV20488BLL-10, XC6SLX9-TQG144
Function hits: Operational amplifier, Audio decode / playback / audio DSP, Real-time clock (RTC)
Why it matched Real-time clock (RTC): U12Licence MIT — as the catalogue declares it, not verified
- esp32-gps-ntp - esp-gps-ntp
BOM014923 · esp-gps-ntp-42643aa6
BOM · 15 lineskicad22 starsProject type: ESP
Key parts: MCP1825-3302E, ESP32-WROOM-32D, DS3231M
Function hits: Real-time clock (RTC), Wireless SoC / wireless module, Low-dropout regulator (LDO)
Why it matched Real-time clock (RTC): U3Licence MIT — as the catalogue declares it, not verified
- open-vapors - reflow-control-board-rev-2
BOM014937 · reflow-control-board-rev-2-4b80a4a7
BOM · 37 lineskicad20 starsProject type: Microchip
Key parts: ATMEGA32U4-AU, DS3231MZ, MCP2300X_SO
Function hits: Real-time clock (RTC), 8-bit MCU (AVR / PIC / 8051 / STM8), AC-DC conversion
Why it matched Real-time clock (RTC): U2Licence MIT — as the catalogue declares it, not verified
- epd_watch - epd-watch
BOM014983 · epd-watch-83d77e27
BOM · 32 lineskicad18 starsProject type: Nordic
Key parts: TP4057, DS3231MZ
Function hits: Real-time clock (RTC), Arm Cortex-M MCU, Wireless SoC / wireless module
Why it matched Real-time clock (RTC): U4Licence MIT — as the catalogue declares it, not verified
- kicad_projects - ds3231-plus
BOM015053 · ds3231-plus-fd5fcc31
BOM · 8 lineskicad16 starsProject type: 接口转换及调试器
Key parts: DS3231M
Function hits: Real-time clock (RTC), Buttons / switches
Why it matched Real-time clock (RTC): U1Licence Apache — as the catalogue declares it, not verified
- kicad - rpishield
BOM015119 · rpishield-62403126
BOM · 14 lineskicad15 starsProject type: 接口转换及调试器
Key parts: DS1338, MCP1702
Function hits: Real-time clock (RTC), Core board / dev board module, Low-dropout regulator (LDO)
Why it matched Real-time clock (RTC): U2Licence GPL-2.0（原仓库 — as the catalogue declares it, not verified
- chronovfd - clockcore
BOM015340 · clockcore-b1dde65f
BOM · 39 lineskicad13 starsProject type: ESP
Key parts: AP2114H-3_3TRG1, SN74HCT245PWR, ESP32-WROOM-32
Function hits: Real-time clock (RTC), Bus buffer / transceiver, Wireless SoC / wireless module
Why it matched Real-time clock (RTC): U4Licence CERN-OHL-P-2.0（原仓库 — as the catalogue declares it, not verified
- chronovfd - radiocore
BOM015342 · radiocore-b1dde65f
BOM · 29 lineskicad13 starsProject type: ESP
Key parts: Si4706-D50-GM, TLV75733PDBV, DS1338Z-33+
Function hits: Real-time clock (RTC), Addressable RGB LED (WS2812 etc.), RISC-V MCU
Why it matched Real-time clock (RTC): U4Licence CERN-OHL-P-2.0（原仓库 — as the catalogue declares it, not verified
- tlnixie - nixie-proj
BOM014086 · nixie-proj-9644a3b9
BOM · 47 lineskicad11 starsProject type: 接口转换及调试器
Key parts: HV5530, LM1117-3.3, MAX1771
Function hits: Real-time clock (RTC), Addressable RGB LED (WS2812 etc.), Wireless SoC / wireless module
Why it matched Real-time clock (RTC): U404Licence GNU — as the catalogue declares it, not verified
- mutif09project - ioexpansion
BOM015481 · ioexpansion-8bc8d34c
BOM · 36 lineskicad10 starsProject type: 接口转换及调试器
Key parts: MCP810-450, MCP809-315, SG-8002DC
Function hits: Real-time clock (RTC), Digital isolator, Isolated interface (CAN / RS-485 / USB / I2C)
Why it matched Real-time clock (RTC): U9Licence MIT — as the catalogue declares it, not verified
- nixie-clock - ds1307-board
BOM015524 · ds1307-board-85358b9c
BOM · 6 lineskicad9 starsProject type: 接口转换及调试器
Key parts: DS1307
Function hits: Real-time clock (RTC), Crystal / oscillator, Power input connector
Why it matched Real-time clock (RTC): U1Licence MIT — as the catalogue declares it, not verified
- retro_calc - mk2090-peri-order
BOM015587 · mk2090-peri-order-0b7d73fa
BOM · 32 lineskicad8 starsProject type: 接口转换及调试器
Key parts: TLP3544
Function hits: Real-time clock (RTC), Optocoupler isolation, Core board / dev board module
Why it matched Real-time clock (RTC): J10Licence GNU — as the catalogue declares it, not verified
- din-rail-circuits - Modbus RTU ESP32控制侧板
BOM013896 · din-rail-esp32-5128d01
BOM · 17 lineskicad7 starsProject type: 接口转换及调试器
Key parts: ESP32-WROOM-32, TXS0108EPW, AMS1117-3.3
Function hits: Real-time clock (RTC), Wireless SoC / wireless module, FRAM / MRAM
Why it matched Real-time clock (RTC): U4Licence CC — as the catalogue declares it, not verified
- Adafruit DS3231 Precision RTC Breakout
BOM003503 · V1.0
BOM · 11 lineskicadKey parts: DS3231/SO
Function hits: Real-time clock (RTC), Qwiic / STEMMA QT / Grove
Why it matched Real-time clock (RTC): IC2Licence not stated in the catalogue
- Adafruit PCF8574 I2C GPIO Expander
BOM003785 · V1.0
BOM · 14 lineskicadProject type: 接口转换及调试器
Key parts: PCF8574RGY
Function hits: Real-time clock (RTC), I/O expander / shift-register expansion, Qwiic / STEMMA QT / Grove
Why it matched Real-time clock (RTC): IC1Licence not stated in the catalogue
- Adafruit PCF8575 I2C 16 GPIO Expander Breakout
BOM003821 · V1.0
BOM · 14 lineskicadProject type: 接口转换及调试器
Key parts: PCF8575
Function hits: Real-time clock (RTC), I/O expander / shift-register expansion, Qwiic / STEMMA QT / Grove
Why it matched Real-time clock (RTC): IC2Licence not stated in the catalogue
