Seven segments clock
About the Seven segments clock PCB
Seven segments clock is an open source ESP8266 PCB design by erickpires, published on GitHub. It is a 2-layer board measuring 337 × 76.1 mm, with 125 components from 31 distinct parts.
Its main chip is the ESP8266, from the ESP8266 family. Other key parts include the 4511, 4504, 4042, 74HC138 and 4082. By type, the board carries 62 resistors, 27 capacitors, 15 ICs, 7 transistors, 4 diodes and 2 connectors.
Main components on the Seven segments clock
Seven segments clock bill of materials (BOM)
125 components, 31 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 6 | 4511 | SOIC-16_3.9x9.9mm_P1.27mm | U1, U3, U5, U8, U11, U12 |
| 2 | 4504 | SOIC-16_3.9x9.9mm_P1.27mm | U2, U6 |
| 2 | 4042 | DIP-16_W7.62mm_Socket_LongPads | U4, U10 |
| 1 | 74HC138 | SOIC-16_3.9x9.9mm_P1.27mm | U7 |
| 1 | 4082 | DIP-14_W7.62mm_Socket_LongPads | U9 |
| 1 | ESP8266 | ESP8266 (NodeMCU_12-E) | U13 |
| 1 | DHT11 | Aosong_DHT11_5.5x12.0_P2.54mm | U14 |
| 1 | LM2596 | LM2596 | U15 |
| 6 | PN2222A | TO-92_Inline | Q1, Q2, Q3, Q4, Q5, Q6 |
| 1 | 13N50F | TO-220-3_Vertical | Q7 |
| 1 | 12V | PinHeader_1x01_P2.54mm_Vertical | J1 |
| 1 | GND | PinHeader_1x01_P2.54mm_Vertical | J2 |
| 1 | SEC_UNITS | LSD230A | SSD1 |
| 1 | SEC_TENS | LSD230A | SSD2 |
| 1 | MIN_UNITS | LSD230A | SSD3 |
| 1 | MIN_TENS | LSD230A | SSD4 |
| 1 | HOU_UNITS | LSD230A | SSD5 |
| 1 | HOU_TENS | LSD230A | SSD7 |
| 1 | Degree | 7SegmentLED_LTS6760_LTS6780 | SSD6 |
| 1 | Percent | 7SegmentLED_LTS6760_LTS6780 | SSD8 |
Show 11 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | LED | LED_D5.0mm | D1, D2, D3, D4 |
| 18 | 100nF | C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C8 +10 |
| 4 | 4.7uF | CP_Radial_D6.3mm_P2.50mm | C15, C21, C23, C25 |
| 3 | 47uF | CP_Radial_D6.3mm_P2.50mm | C18, C20, C24 |
| 2 | 470uF | CP_Radial_D10.0mm_P5.00mm | C26, C27 |
| 44 | 160R | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R8 +36 |
| 7 | 1k | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R15, R18, R35, R38, R53, R58, R62 |
| 4 | 560R | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R16, R19, R36, R39 |
| 5 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R17, R20, R37, R40, R59 |
| 1 | R_Photo | R_LDR_4.9x4.2mm_P2.54mm_Vertical | R60 |
| 1 | 2.2M | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R61 |
Seven segments clock design files
The KiCad project lives in the erickpires/seven-segments-clock repository on GitHub; these links point at the commit this page was built from.
Seven segments clock: common questions
What microcontroller does the Seven segments clock use?
The Seven segments clock is built around the ESP8266, from the ESP8266 family.
How big is the Seven segments clock PCB?
The Seven segments clock measures 337 × 76.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Seven segments clock?
125 components, from 31 distinct parts. The full bill of materials is listed on this page.
Where can I download the Seven segments clock design files?
From the erickpires/seven-segments-clock repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Seven segments clock design in my own project?
The repository has no license, so all rights stay with erickpires. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Seven segments clock without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.
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