bme280_small

MoteinoUSB

MoteinoUSB

Autolight-board

Auto light

Attiny10 & APDS-9930 based automatic light/switch

https://github.com/N-Storm/autolight

https://easyeda.com/NStorm/autolight-board

This project utilizes small ATtiny10 mcu to work with APDS-9930 ambient light (AL) and proximity I2C sensor.
This is used for automatic "smart" light in a drawer. Once the drawer are open the APDS-9930 will notice proximity change
and trigger a preset interrupt and MCU will come from sleep to check if AL level are below set (i.e. it's dark around).
If the set condition for AL level will be met, it will enable HIGH level on PB3 pin. Which is connected to a MOSFET or any other switch to enable LED light.

Reset shares same PB3 pin so it must be disabled via fuses. You will have to apply +12V to PB3/RESET pin to reprogram attiny10 after flashing RSTDISBL fuse.

The PB2 port are used as INT0 for sensor interrupts to wake MCU from sleep on proximity change event.

Building

Fetch the latest trunk:

git clone https://github.com/N-Storm/autolight && cd autolight

Then tweak some settings in autolight.h if required. They are commented. After that do a:

make && make flash && make fuse.

:warning: After you do a make fuse step, you won’t be able to program MCU again without applying +12V to RESET pin (make sure it’s not connected to your programmer hardware :warning:

Alternatively you can use pre-built binaries with the default settings from releases section.

Connecting

PB0 ↔ SCL

PB1 ↔ SDA

PB2 ↔ INT

PB3 are the module digital output, with logic LOW when light should be turned off and HIGH when it should be on. Suited for connecting to an N-channel FET driving the LED light.

Please be aware that the APDS-9930 module requires 2.5 – 3.6 V for it’s operation on Vdd+Vbatt (IR LED power). I recommend to use a 3.3V LDO for powering both MCU & APDS-9930.

Schematics & board are available on EasyEDA: https://easyeda.com/NStorm/autolight-board

:warning: This board has two places for LDOs - U3 & U4. Solder only one of them! :warning:

They replace each other. The board are made so they could replace each other. Alternatively edit board/schematics to replace them with your favorite LDO.

This project utilizes software I2C library by eXtreme Electronics, India.
www.eXtremeElectronics.co.in

Gerber_adcd_20190527235933

Raspberry Pi gateway interface

Discrete 4-way 8-bit bus selector

4-input bus selector/multiplexer built from discrete transistors and resistors.

MySensors - DS18B20 temperature sensor

This is a bare minimum DS18B20 based temperature sensor node.

It is intended to be as small as possible, with really long battery life. The ATmega328P is powered directly from the battery, but the nRF24L01+ and DS18B20(s) are powered through an efficient XC6206 3.3v LDO regulator (U2). The battery can be 3x AA/AAA, or a LiPo/Li-ion cell (i.e. 18650).

This uses the SMD version of the nRF24L01+ module.

All resistors/capacitors are 0805 sized with the following values:

• R1 - 4.7kOhm
• C1,C2 - 4.7uF - 10uF
• C3,C4 - 100nF

The ATmega328P MCU needs to be programmed before being soldered, so the MYSBootloader is recommended.

MYSNodeRS485 rev001

MySensors Node RS485
ATmega328 + MAX485

D7 pin used for control RS485 DE/RE input.

On long side of board present 11-pin header include:

D2, D3, D4, D5
A0, A1, A4/SDA, A5/SCL
GND, 5V

On short side of board present two pin header include:

5V, GND, D2, D3 (for simple connect sensors like DS18B20, DHT22)
RES, TX, RX (for connect UART)

Present place to solder pull-up resistors for RES, D2, D3, SDA, SCL signals.
It is also possible to install LED connected between D6 pin and 5V through 510Ohm resistor.

Adafruit ItsyBitsy M4 Express featuring ATSAMD51

https://www.adafruit.com/product/3800

Gerber_[pnbhjok_20190424173310

nrfmicro

Arduino Pro Micro-sized Bluetooth board with Li-Po charger and USB Type-C support

LM399 Basic Board

Basic LM399 Board. Please see for more info:

https://github.com/pepaslabs/basic-lm399

Voltage Reference

Dual Synchronous Step-Up DC/DC Converter Breakout Board

Dual Synchronous Step-Up DC/DC Converter Breakout Board
Rev. 1
Initial revision
Tested, works fine

AP2112M 3.3V-regulator with TXB0104 logic level shifter

AP2112M 3.3V-regulator with TXB0104 logic level shifter.
Breadboard-compatible pin headers.

Minimum components:

• AP2112M (4-SOIC) and TXB0104 (14-SOIC)
• 4 capacitors (2 x 1uF in 1206, and 2 x 0.1uF in 805)
• one pull-down resistor (in 805)

See https://github.com/vladbelous/ap2112m-txb0104-module for full schematic and details.

USB-C FTDI Programmer

USB-C FTDI Programmer
Rev. 1.2
Improved version. Additional LED added to the schematic, indicating the availability of power supply provided to the module.
Tested, works fine.

current_probe

Power Supply Adapter

Power Supply Adapter
Rev. 1
Tested, works fine.

TVL61225 Breakout Board

TVL61225 Breakout Board
Rev. 1
Not tested yet, waiting for delivery

RPi3B+ RAK833 PoE HAT Rev.1.3

RPi3B+ RAK833 PoE HAT
Rev.1.3
Not tested yet, waiting for delivery

SHT35-D High Accuracy Humidity and Temperature Sensor Breakout Board

SHT35-D High Accuracy Humidity and Temperature Sensor Breakout Board
Rev. 1.2
Rearranged pin header to meet better the accepted standards (thank you @wijnand)
Not tested yet, waiting for delivery

USB-C FTDI Programmer

USB-C FTDI Programmer
Rev. 1.1
Initial revision
Tested, works fine.
One more LED will be added to the next revision, which will indicate availability of power supply, provided to the module. In the current revision, only two LED's are available, blinking when the module is in the data transfer mode.

USB dual rail power supply

A little dual rail (±12 volt) power supply board powered from USB

SHT35-D High Accuracy Humidity and Temperature Sensor Breakout Board

SHT35-D High Accuracy Humidity and Temperature Sensor Breakout Board
Rev. 1.1
Initial revision
Not tested yet, waiting for delivery

TQFP-32 Breakout Board

TQFP-32 Breakout Board
rev.1.1
Initial revision
Tested, works fine.