Build a DIY Lap Timer for a Backyard Race Track
Build a DIY timer to perfect your motorized trike lap-times around your backyard.
timer
Prison Door System Built Using Only Timers and Relays
When the trustees of a southern prison insist that no microprocessors or transistors be used to create a new door and gate locking system, a young engineer springs into action with relays and timers.
Swim Timer for Late Night Laps
Doug had a problem to solve: when he swims early in the morning, there’s not enough light to see the pool’s pace clock at the end of the lane. Like any good maker, he devised his own solution. He built a waterproof swim timer that uses an LED display to show your time.
DIY Hardware-Based Freelance Time Tracker
Our friend Raphael Abrams from NYC Resistor needs to track the hours he works as a freelancer but none of the solutions out there work very well for him. He therefore decided to make his own hardware-based detonator-style time tracker which he calls “Puncher.” The source code and schematics are available to download if you’d […]
Wake up your fish feeder
Cheap automatic aquarium feeder on the go. – More DIY How To Projects Zach, one of my 9th grade students showed me this last week. Hey, maybe you should really mess with your fish by modifying this idea to feed them every time you download files to your thumb drive. It really could be feast […]
555 timer cake
From the MAKE Flickr photo pool For InterAccess’ “555 Timer Night” at Open Studio, they made this 555 IC cake, inspired by EMS Labs’ circuitry snacks. Nice to have the data sheet handy so you know what you’re eating. Those 23 transistors, 2 diodes, and 16 resistors may look hidden inside that tiny DIP, but […]
Simple night-light timer
What do you do about a night-light that has to stay on while your child falls asleep, and you don’t want to have to go in and turn it off every night? Buy a timer? No, that’s not fun. The solution: teach her something! So we repurposed an old broken desk lamp carcass, I taught […]
