These 2.8″ 240×320 pixel color TFT displays for $8-10 can be found on ALiExpress. There’s also an equivalent-looking one offered by AdaFruit for $30 if you want one fast – the pins are quite differently label, but I’m willing to … Continue reading
I recently ordered a set of 10 new ESP-01’s from China. After the usual few weeks, they arrived. I pulled one out, plugged it into the socket on my little interface board – which has buttons for RST and GPIO0, … Continue reading
In a previous post, I described how I replaced the highly-proprietary power supply on min wine refrigerator with an off-the-shelf supply and a Monster Moto shield to drive the fans and termoelectric peltier heat sinks based on the PWM (pulse-width … Continue reading
I’m just going to blog about this one briefly, in case their are any other enterprising Wine Cooler owners out there who find that, two years into owning their cheapo wine cooler, the power supply craps out. I didn’t take … Continue reading
The ESP8266 family of boards still amaze me with their size and cost-effectiveness, but I will confess; the dearth of official information for some of the more esoteric features can be annoying. For my remote garage-door sensor, I wanted to … Continue reading
I’ve got a bunch of z-wave light switches and plugs in my house and I use OpenHab as my centralized home automation system. I have a detached garage and neighbors have experienced occasional break-ins in similar garages where people stole tools and … Continue reading
OK, just a quick blurb in case anyone else runs into this incredibly frustrating experience: I’m playing with some sensors where I’m interested in really low power consumption. Basically, I want to go into deep sleep, which only draws <100uA, … Continue reading
I blogged briefly about building a security camera back in a previous post. It worked so well I decided to build another, but with a few improvements based on past experience… I used this WiFi adapter (from Aazon): TRENDnet Wireless N 150 … Continue reading
One thing that’s been pretty annoying playing with the ESp-01 variant of the ESP8266 modules is the pinout form factor. The 2×4 pin configuration does not plug into a prototyping breadboard conveniently, and also doesn’t lend itself to connectors you … Continue reading
This post describes a project I undertook to build a home-grown, Arduino-based, WiFi-enabled lawn sprinkler controller. I don’t know about you, but I’m never happy with my lawn sprinkler schedule. In Austin, it can rain till my garage floods one week, … Continue reading
