2 layers160 × 100 mm
2 layers52.5 × 28 mm
Kitchen timer
hggh/kitchen-timer16kitchen timer
- Size
- 52.5 × 28 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 41
- Pads
- 119
- Tracks, vias
- 268, 18
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 21 Sep 2019
- Updated
- 3 Apr 2023
Overview
Kitchen timer is an open-source printed circuit board by hggh, from the hggh/kitchen-timer repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 52.5 × 28 mm with 35 parts on 41 nets, routed with 268 tracks and 18 vias.
It is built around the ATMEGA328-PU, DW01A and FS8205A, with the TP4056, BC817 and BC807 among its other parts. Its parts include 10 resistors, 7 connectors, 5 capacitors, 4 ICs and 3 transistors. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
6
ATMEGA328-PU
PDIP-28-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH PDIP-28 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
DW01A
SOT-23-6L-40℃~+85℃ 1 2.5V 300mV~10V 3uA 4.3V Protection IC Support SOT-23-6L Battery Management ROHSPUOLOPBattery ManagementFS8205A
SOT-23-6-55℃~+150℃ 1.2V 1.5W 2 N-Channel 20V 31.5mΩ@2.5V 466pF 5.7nC@4.5V 58pF 65pF 6A SOT-23-6 MOSFETs ROHSTECH PUBLICMOSFETs
TP4056
ESOP-8-40℃~+85℃ 1 1A 35uA 4.2V 4V~6.5V Charging IC Lithium Battery Support Support 恒流充电、恒压充电、涓流充电、自动再充电、充电终止、可编程充电电流、软启动、欠压锁定 ESOP-8 Battery Management ROHSUMWBattery Management
BC817
SOT-231 NPN 100nA 150MHz 300mW 40 45V 500mA 5V 700mV NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)BC807
SOT-23-65℃~+150℃ 1 PNP 100 100nA 345mW 45V 500mA 5V 700mV 80MHz PNP SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
README
README.mdkitchen-timer
parts
- Atmel 328p (1Mhz, BOD disabled)
- 32 khz crystal (timer2, async)
- TM1637 – 4 Digit 7 Segment Display
- Rotary encoder KY-040
- TP4056 with DW01-P
- LiPo 18650
- buzzer
BOM
| Qty | typ |
|---|---|
| 3 | 100nf smd 0805 |
| 2 | 10µF smd 0805 |
| 1 | TP4056 |
| 2 | BC817 |
| 1 | BC807 |
| 2 | 10k smd 0805 |
| 3 | 2.6k smd 0805 |
| 1 | 0.4 smd 1206 |
| 1 | 20k smd 0805 |
| 1 | 2k smd 0805 |
| 1 | 100 smd 0805 |
| 1 | 1k smd 0805 |
| 2 | 4.7k smd 0805 |
| 1 | ATmega 328-PU |
| 1 | FS8025A |
| 1 | DW01A |
| 1 | 32khz crystal |
| 1 | KY-040 |
| 1 | battery holder 18650 |
| 1 | lipo 18650 |
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 2.6k | Resistor_SMD:R_0805_2012Metric | R2, R3, R4 |
| 2 | 100nf | Capacitor_SMD:C_0805_2012Metric | C2, C3 |
| 2 | 10µF | Capacitor_SMD:C_0805_2012Metric | C4, C5 |
| 2 | 4,7k | Resistor_SMD:R_0805_2012Metric | R10, R11 |
| 2 | BC817 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2 |
| 2 | R | Resistor_SMD:R_0805_2012Metric | 10k1, 20k1 |
| 1 | 0.4 | Resistor_SMD:R_1206_3216Metric | R5 |
| 1 | 1.5k | Resistor_SMD:R_0805_2012Metric | R7 |
| 1 | 100 | Resistor_SMD:R_0805_2012Metric | R8 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric | C6 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric | R1 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric | R9 |
| 1 | 32khz | Crystal:Crystal_DS15_D1.5mm_L5.0mm_Vertical | Y1 |
| 1 | ATmega328-PU | Package_DIP:DIP-28_W7.62mm | U1 |
| 1 | BATT | Connector_JST:JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J1 |
| 1 | BC807 | Package_TO_SOT_SMD:SOT-23 | Q3 |
| 1 | Buzzer | Connector_PinHeader_2.00mm:PinHeader_1x02_P2.00mm_Vertical | BZ1 |
| 1 | Conn_01x02_Male | Connector_PinHeader_2.00mm:PinHeader_1x02_P2.00mm_Vertical | J7 |
| 1 | DW01A | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | FS8205A | Package_SO:TSSOP-8_4.4x3mm_P0.65mm | U2 |
| 1 | LCD | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | RT | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J3 |
| 1 | RTC | Connector_PinHeader_2.00mm:PinHeader_1x02_P2.00mm_Vertical | J5 |
| 1 | SW2 | Connector_PinHeader_2.00mm:PinHeader_1x02_P2.00mm_Vertical | J2 |
| 1 | TP4056 | tp4056:TP4056_SOP-8-PP | IC1 |
| 1 | USB IN | Connector_PinHeader_2.00mm:PinHeader_1x02_P2.00mm_Vertical | J6 |
Questions
How big is the Kitchen timer PCB?
It measures 52.5 × 28 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Kitchen timer use?
35 parts, built around the ATMEGA328-PU, DW01A, FS8205A and TP4056. 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 Kitchen timer KiCad files?
From the hggh/kitchen-timer repository on GitHub, at the commit this page was made from: the board is pcb2/kitchen-timer.kicad_pcb and its schematic pcb2/kitchen-timer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Kitchen timer design in my own project?
Its repository publishes it under the GPL-3.0 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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