all fun projects at Olimex Ltd
30 Apr 2020 Leave a comment
in new product, open source, OSHW, PCB, sensor Tags: 32-bit, ADC, ads1262, ecg, eeg, ekg, sensor, thermocouple
BB-ADS1262 is breakboard for ADS1262 low-noise, low-drift 38.4-kSPS, delta-sigma (ΔΣ) ADCs with an integrated PGA, reference, and internal fault monitors.
Possible applications are sensor reading, small signals (ECG/EEG), weigh scales, strain-gauge sensors, thermocouples, and resistance temperature devices (RTD).
08 Apr 2020 2 Comments
in arduino, Learning, sensor Tags: arduino, covid-19, distance, eduardu, infrared, meter, projects, thermometer
Keep social distance while drinking with friends 🙂
No this is not an eduArdu project, but it is still fun to implement.
The eduArdu Social Distance project is using the onboard Ultra sound distance meter and beeps with its buzzer when someone comes closer than 1.5 meters from you.
The eduArdu Infrared Thermometer project uses MOD-IR-TEMP and scans surface temperature from a distance of few centimeters. If the read temperature is above 38 C it will beep with the buzzer to warn you.
Both projects are easy to implement together with your children.
21 Jun 2019 1 Comment
in arduino, IoT, sensor Tags: air, co2, digital, humidity, pressure, sensor, temperature
Analog gas and air quality sensors have quite negligent readings. They need special calibration to measure correctly.
This is why CCS811B digital air quality sensor by AMS is so interesting. It can measure indoor air quality and CO2 content with digital readings from 400 up to 29206 ppm.
MOD-ENV has CCS811B and BME280 digital precise temperature, humidity and air pressure sensor assembled together. Both operate through I2C and are low power with sleep modes which makes them perfect for enviroment monitoring and IoT.
ESP32-POE, ESP32-POE-ISO, ESP32-EVB has UEXT connectors and can directly connect to MOD-ENV.
The price of MOD-ENV is between EUR 14.36 and 15.95 depend on quantity.
07 Sep 2018 Leave a comment
in arduino, IoT, new product, sensor Tags: aquarium, arduino, automation, level, pump, switch, water
SNS-WATER-LEVEL is floating magnet with reed contact sensor with travel length of 50 mm. It allow you to switch on off small pump which to keep the fluid level constant and to refill it. You can directly connect to Arduino or ESP32 IoT boards GPIO.
IMM-WATER-PUMP is silent submersible water pump which can help you to filter the aquarium water or to watering your flowers at home. It works with 3VDC and consume 0.12A.
06 Sep 2018 9 Comments
in esp32, IoT, KiCAD, new product, open source, OSHW, sensor, wifi Tags: board, development, esp32, iot, poe, wifi
ESP32-POE board is now in stock. The prices start from EUR 14.36 for 50 pcs order.
This board offers Open Source Hardware / FOSS solution and building block for distributed sensor network with power over existing LAN infrastructure.
Possible use cases are Home automation, Industrial machine logging, remote environmental monitoring, access control, remote displays etc.
The board contains ESP32-WROOM-32 module with WiFi/BLE and Ethernet connectivity , RESET and USER buttons, micro SD card, LiPo battery charger and LiPo connector which allow board to work even with power supply drops.
The UEXT connector on the board can be used to connect many different sensors like:
Si3402-B chipset takes care for the power over ethernet, it’s IEEE 802.3 compliant, including pre-standard (legacy).
Important notice, to keep board compact and as it’s main purpose is to connect to cloud different remote sensors there is no galvanic isolation between board and the power delivered by the LAN switch or router.
ESP32-POE has internal programming interface and you can program it with Espressif SDK or Arduino via USB cable. As the board is not galvanic isolated from the Ethernet power supply, before you connect the USB cable to your computer you should remove the Ethernet cable or you should use USB-ISO between your computer the ESP32-POE!
03 May 2018 Leave a comment
in sensor Tags: arduino, board, linux, pir, sensor
PIR-SB312 is small low power PIR sensor with digital output. Very easy to connect to Arduino and OLinuXino linux boards as can be powered from 2.7 to 12V.
It can sense objects from 3-5 meters and due to it’s small size it’s easy to hide.
27 Mar 2018 2 Comments
in arduino, IoT, KiCAD, open source, OSHW, sensor Tags: bme280, humidity, iot, pressure, temperature
BME280 is digital humidity, temperature and pressure sensor with I2C and SPI interface.
You can see on this link comparison of different Humidity sensors
The operating conditions are:
The sensor works on 3.3V and is with very low power consumption 0,1..3,6 uA.
The easiest way to connect MOD-BME280 is with UEXT connector to any board with UEXT connector as shown on the picture above.
For boards which has no UEXT connector MOD-BME280 can be connected via four jumper wires on breadboard:
The KiCad files are uploaded on GitHub.
The demo software use Adafruit BME280 libraries with two small modifications. The default address in MOD-BME280 is 0x76 while Adafruit library is set to 0x77.
UEXT connector requires D8 to be set LOW to power and 10 ms delay to settle the power before addressing the sensor. The code is at GitHub.
When you run it you will see this:
The sensor is very precise, if you move board up and down you can see altitude changes. The 171 meter is the altitude of Olimex building.
MOD-BME280 is perfect for IoT application for environmental conditions logging due to the low power consumption and precise measurements. It can be used both for indoor and outdoor applications.
olimex 
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