Battery Powered Arduino DS18B20 Temperature Sensor

18650 battery powered Arduino DS18B20 temperature sensor would lost many years without to re-charge or replace the battery, for temperature sensors its best to use 3.3v Arduino Pro Mini with lower clock speed to conserve battery. To optimize further i have removed power LED and status led connected to Arduino mini pin 13, then feed power to Arduino mini through raw pin with 18650 battery. i have these sensors running over 16 months now and battery is still 96%. It…

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Connect Arduino with nRF24L01 Radio

The nRF24L01+ transceiver module uses the 2.4GHz band and it can operate with baud rates from 250kbps up-to 2Mbps true ultra low power and low cost transceiver. nRF24L01+ communicate with Arduino via SPI interface and it consumes around 12mA with operating voltage from 1.9v to 3.3v. nRF24L01+ can communicate with other nRF transceiver modules and it can reach 100m in clear line of sight with lower baud rate. In this article I will explain you how to connect nRF24L01 with…

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