Category Archive: Power Supply

Jul 11

New Bethany version firmware for Weather Stations

July 11, 2017 It has been gratifying to hear from the weather station builders. I took a break from hardware development while on a beach vacation in June but made some important firmware upgrades between taking the sun and eating blue crabs. A few of the changes improve the reliability of the solar power supply, …

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Permanent link to this article: http://w4krl.com/new-bethany-version-firmware-for-weather-stations/

May 21

Power supply measurements

Most electronic projects operate on low voltage direct current. This is often provided by a USB connection or a battery. There are several possibilities to power a project from the 120 Vac power line. A common way is to use a wall adapter¬†(wall wart) and feed low voltage direct current to your project through a …

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Permanent link to this article: http://w4krl.com/power-supply-measurements/

Dec 11

Sleep Mode for the Wemos D1 Mini

The key to using solar power in an Internet of Things project is to put the microcontroller unit into sleep modeafter the sensors are read and the data posted to your IoT server. The NodeMCU and the Wemos D1 WiFi, a larger profile that mimics the Arduino UNO form, reliably woke from deep sleep. So …

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Permanent link to this article: http://w4krl.com/sleep-mode-for-the-wemos-d1-mini/

Nov 24

Solar Power Supply

A solar power supply would be a really neat addition to any Internet of Things project. The ultimate goal would be to have a self-sufficient IoT device that could be remotely reprogrammed¬†with the Other The Air (OTA) feature. A key to using solar power is to reduce the average power requirement of the IoT device. …

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Permanent link to this article: http://w4krl.com/solar-power-supply/