2 layers185.4 × 160 mm
8088-mainboard
i-melnichenko/8088-homebrew-computer
An open-source modular computer built around the Intel 8088 CPU.
104 parts12MIT
2 layers75.4 × 23.7 mm
Esp door sensor
danielchiaradia/ReedSwitch1ESP8266 Reed Switch/Door/Window contact
- Size
- 75.4 × 23.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 13
- Nets
- 12
- Pads
- 33
- Tracks, vias
- 64, 6
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 28 Nov 2021
- Updated
- 5 Jan 2023
Overview
Esp door sensor is an open-source printed circuit board by danielchiaradia, from the danielchiaradia/ReedSwitch repository on GitHub. It is a 2-layer board of 75.4 × 23.7 mm with 13 parts on 12 nets, routed with 64 tracks and 6 vias.
It is built around the ATTINY85-20PU and NDP6020P. Its parts include 3 connectors, 2 resistors, 2 ICs, 1 capacitor and 1 transistor. It belongs with the sensors and measurement boards and the ESP8266 and AVR (ATmega, ATtiny) boards of this library.
Main components
2
ATTINY85-20PU
PDIP-8-40℃~+85℃ 10bit 2.7V~5.5V 20MHz 512Byte 512Byte 6 8 Bit 8KB AVR Built-in FLASH PDIP-8 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
NDP6020P
TO-220-3-65℃~+175℃@(Tj) 1 P-Channel 1.59nF@10V 1V@250uA 20V 24A 35nC@5V 50mΩ@12A,4.5V 60W TO-220-3 MOSFETs ROHSonsemiMOSFETs
README
README.mdReedSwitch
Simple Door/Window contact with low quiescence current of around 5µA (according to my cheap multimeter ...). There is quite some power loss on the ESP development board caused by the regulator, serial converter and other components. However, it will only be powered for a short amount time, so it's not worth going the hard naked ESP way here.
BOM
- ESP01
- Attiny85
- LiFePO4 Battery
- 2 x 3K3 Ohm resistor
- 410 µF capacitor
- Reed Switch with two terminals or alternatively a normally closed reed switch.
- 1xP-Channel MOSFET (e.g.NDP6020P)
How it works
The attiny will be turned on by the reed switch and then turns the ESP via the MOSFET on. The ESP sends the current state of the reed switch to a REST service. After sending the data, the ESP signals to the attiny to turn of the power.
Quiescence current
Around 5-10 µA with closed reed switch. Open switch will cause around 20-30 µA current (probably the closed terminal draws some current)
Parts
13| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 3.3 k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | Conn_01x01 | Connector_Wire:SolderWire-0.75sqmm_1x01_D1.25mm_OD2.3mm | J1, J3 |
| 1 | ATtiny85-20P | Package_DIP:DIP-8_W7.62mm | U2 |
| 1 | C_Polarized | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C1 |
| 1 | Conn_01x02 | Connector_Wire:SolderWire-0.75sqmm_1x02_P7mm_D1.25mm_OD3.5mm | J2 |
| 1 | ESP-01v090 | ESP:ESP-01 | U1 |
| 1 | NDP6020P | Package_TO_SOT_THT:TO-220-3_Vertical | Q1 |
The 9 most common of 13 parts.
Questions
How big is the Esp door sensor PCB?
It measures 75.4 × 23.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Esp door sensor use?
13 parts, built around the ATTINY85-20PU and NDP6020P. 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 Esp door sensor KiCad files?
From the danielchiaradia/ReedSwitch repository on GitHub, at the commit this page was made from: the board is assets/esp-door-sensor/esp-door-sensor.kicad_pcb and its schematic assets/esp-door-sensor/esp-door-sensor.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Esp door sensor design in my own project?
Its repository states no licence, so its author keeps all rights: ask danielchiaradia before reusing the design.
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