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I turn NE555 based soldering practice kits from Aliexpress into gifts for children.
I've upgraded the portable stereo again
3D printed catapult that used stepper motors for reloading and launching bullets. Uses ESP-NOW to communicate with remote control unit.
A unique Stylophone-type keyboard that I designed for my electronic musical adventures.
Make a refused error prone frigerator into a modern brewmasters lager box
An in wall subwoofer to add bass in 2 rooms
Among the stuff we removed from our late son's apartment were two subwoofers without the rest of the systems they belong to. I could have bought complete systems for less than the original parts to go with these but they were too good to throw out...
I've had this decade box for about half a century and it wasn't new when I got it. When I used it recently I realized that the resistors in it had drifted out of spec so it's time to rebuild it.
It's just a panel of randomly flashing LEDs that mimics props from old Sci-Fi movies & TV.
I'm revisiting a project I made a couple of years ago to improve the housing (& probably make it sound a bit better too).
My ancient Heathkit bench supply died a while ago so I bought one of the 30V 3A variable power supply kits like the link below that are all over eBay to replace/upgrade the insides of it with.
In our family we exchange homemade Xmas cards instead of gifts (much easier to get the right size &c).
A few years ago I saw this video and shortly after I came across low voltage strings of LED Xmas lights in a January clearance and the cards my wife & I make haven't been the same since :D
My part of the project starts with spray painting some of the folders we make the cards from and then waiting for instructions on where to put the lights. While I'm waiting I cut up a string or 2 of...
Thermal printers are very common in our daily life, and there are examples of thermal printers in restaurants, parking lots and shopping. This article will focus on the application of thermal printers in parking systems.
What we need to do here is such an application, select different modes through STONE Touch Screen, realize the control of MCU through serial port communication, and then realize the speed and rotation time control of stepping motor.