2 layers32 × 76.1 mm
DPicoTracker
Mineinjava/ffellowship
Frequency Fellowship: Examining Radio Wave Propagation from a High Altitude Balloon
49 parts1
2 layers100 × 34 mm
7clock
Quard/7clockSimple budget clock using 7 segment display with cheap PIC microcontroller and RTC chip
- Size
- 100 × 34 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 59
- Nets
- 58
- Pads
- 214
- Tracks, vias
- 494, 190
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 1 Feb 2023
- Updated
- 6 Oct 2024
Overview
7clock is an open-source printed circuit board by Quard, from the Quard/7clock repository on GitHub, published under the MIT licence. It is a 2-layer board of 100 × 34 mm with 59 parts on 58 nets, routed with 494 tracks and 190 vias.
It is built around the ATTINY414-SSN, TPS61221DCK and 74HC595, with the PCF8523T, BC807 and AO3401A among its other parts. Its parts include 23 resistors, 8 transistors, 7 capacitors, 5 ICs and 3 connectors. It belongs with the lEDs and displays boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
8
ATTINY414-SSN
SOIC-14-40℃~+105℃ 1.8V~5.5V 10bit 12 128Byte 20MHz 256Byte 4KB 8 Bit 8bit AVR Built-in FLASH SOIC-14 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
TPS61221DCK
SC-70-6-40℃~+125℃@(TJ) 1 200mA 3.3V 5.5uA 700mV~5.5V Boost Boost Built-in Fixed Yes SC-70-6 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
74HC595
SOP-16-40℃~+85℃ 1 100ns@5V,50pF 10MHz 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOP-16 Shift Registers ROHSGRShift Registers
PCF8523T
SOIC8Real-Time Clock (RTC) and calendarNXP SemiconductorsUncategorised
BC807
SOT-23-65℃~+150℃ 1 PNP 100 100nA 345mW 45V 500mA 5V 700mV 80MHz PNP SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
BAT60A
SOD-323Schottky DiodesSlkorAO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
Parts
59| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R2, R4, R5, R14, R15, R16, R17, R18 |
| 8 | 220 | Resistor_SMD:R_0603_1608Metric | R6, R7, R8, R9, R10, R11, R12, R13 |
| 5 | BC807 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4, Q5 |
| 4 | 100k | Resistor_SMD:R_0603_1608Metric | R1, R21, R22, R23 |
| 4 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C3, C4, C5 |
| 4 | SA10-21SURKWA | SA10-21SURKWA:DIP3040W75P254L2400H1050Q10N | DS1, DS2, DS3, DS4 |
| 2 | 10u | Capacitor_SMD:C_0805_2012Metric | C6, C7 |
| 2 | 2k2 | Resistor_SMD:R_0603_1608Metric | R19, R20 |
| 2 | 74HC595 | Package_SO:SO-16_3.9x9.9mm_P1.27mm | U3, U4 |
| 2 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q6, Q7 |
| 2 | BAT60A | Diode_SMD:D_SOD-323 | D1, D2 |
| 1 | 32.768Hz | Crystal:Crystal_C38-LF_D3.0mm_L8.0mm_Horizontal | Y1 |
| 1 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C2 |
| 1 | 4u7 | Inductor_SMD:L_Vishay_IHLP-2525 | L1 |
| 1 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q8 |
| 1 | ATtiny414-SS | Package_SO:SOIC-14_3.9x8.7mm_P1.27mm | U1 |
| 1 | Battery | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | BT2 |
| 1 | Battery_Cell | CR1220D-011:CR1220D-011 | BT1 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | DC | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2 |
| 1 | FerriteBead | Inductor_SMD:L_0603_1608Metric | FB1 |
| 1 | PCF8523T | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | R_Photo | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | R3 |
| 1 | SW_Push | Button_Switch_SMD:SW_SPST_SKQG_WithoutStem | SW1 |
| 1 | SW_Reset | Button_Switch_SMD:SW_SPST_CK_RS282G05A3 | SW2 |
| 1 | TPS61221DCK | Package_TO_SOT_SMD:Texas_R-PDSO-G6 | U5 |
| 1 | UPDI | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J1 |
Questions
How big is the 7clock PCB?
It measures 100 × 34 mm and has 2 copper layers, 1.6 mm thick.
What parts does the 7clock use?
59 parts, built around the ATTINY414-SSN, TPS61221DCK, 74HC595 and PCF8523T. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the 7clock KiCad files?
From the Quard/7clock repository on GitHub, at the commit this page was made from: the board is hardware/7clock.kicad_pcb and its schematic hardware/7clock.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the 7clock design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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