Tag Archives: ESP8266

Display time on a 1950s multimeter

via Arduino Blog

Given an input and some sort of indicator, is there any device that can’t be hacked into a timepiece? With the help of an Arduino Nano and an ESP8266 module, Guilio Pons has created a unique clock out of a 1950s-era multimeter.

Pons’ project not only displays time with an indicator originally meant to reveal electrical values, but is also able to output sounds as needed using a speaker recovered from an old toy. He integrated three LEDs as well as a PIR sensor, so the unit can light up at night.

PWM control from the Arduino takes care of moving the gauge, while the ESP8266 allows the time to be synchronized via the Internet and the alarm adjusted over WiFi.

Want to retrofit a vintage tester of your own? Be sure to check out Pons’ entire log on Hackaday.io. You can find the software library that he used to play sounds here.

Wake Up! The Cat Came Back!

via hardware – Hackaday

In order to get the most out of the batteries connected to your microcontroller, you’ll probably need to put it to sleep, the deeper the better. [Rgrokett] was curious about the nighttime habits of his cat, and came up with a nice little hack to get more battery life out of the ESP8266 that he was using.

[rgrokett]’s cat enters and leaves through a cat-door. He figured a PIR sensor would let him know when there was movement around the door. He could then tell if the cat was around. Leaving the PIR sensor and the ESP8266 microcontroller (an Adafruit Huzzah) on all the time drained the batteries pretty quickly, so [rgrokett] decided to try putting the Huzzah to sleep.

The trick in this build is that the PIR sensor is used to reset the Huzzah when it triggers. The Huzzah requires the reset switch to go from high to low, but the PIR trigger goes from low to high, so a transistor is used to invert the PIR sensor’s trigger signal. When the Huzzah wakes up, it connects to the WiFi network and sends [rgrokett] an email via IFTTT ([rgrokett]’s description goes over the steps to set up a secure connection to IFTTT.)

It’s a pretty simple hack, but it increases [rgrokett] system’s battery life from a couple of days to more than a month (he’s still waiting to see how long they’ll last) and all that was needed was the microcontroller, the sensor and a couple of parts. We have a couple of older hacks about putting the ESP modules into deep sleep, such as this one, and check out this tutorial on PIR sensors.

Filed under: hardware

WiFi Power Bar!

via hardware – Hackaday

Ever wanted to access a file or run some program on your computer while away from home, but the darned thing is turned off? Finding themselves occasionally working away from home and not wanting to leave their computer on for extended periods, [robotmaker]’s solution was to hack into existence a WiFi-controlled power bar!

esp8266-powerbar-thumbInside the junction box, an eight-channel relay is connected to an ESP8266 module. The module uses MQTT to communicate with Home Assistant and is powered by a partially dismembered USB AC adapter — wrapped in kapon tape for safe-keeping. The entire bar is wired through a 10A fuse, while also using a fire resistant 4-gang electrical box. Once the outlets were wired in, closing it up finished up the power bar.

[robotmaker] controls the outlets via a cheap smartphone — running HADashboard — mounted to a wall with a 3D printed support. Don’t worry — they’ve set up the system to wait for the PCs to power down before cutting power, and the are also configured to boot up when the relay turns on.

The best part — the power bar only cost $25.

[via /r/homeautomation]

Filed under: hardware, home hacks, wireless hacks

ESP8266 LED lighting: QuinLED v2.6 PCB

via Dangerous Prototypes


Quindor designed and built an ESP8266 LED lighting QuinLED project with Dirty Board PCBs:

It’s been a long time in the making but I’ve finally put the final touches on my newest revision of QuinLED! This makes it version 2.6 rev 1.00. Let’s check it out!

This post is part of a series – The index for this series can be found here.

Full details at Intermittent Technology homepage. Boards DirtyPCB order link here.

Check out the video after the break.