Year: 2009

Striking LED clock

Ronald Dekker made this “mixed signal” LED clock. He writes: The term “mixed-signal” is usually reserved for circuits and ICs that process both analog and digital signals. In that sense the title “A mixed-signal LED clock” is perhaps misleading since this is a digital clock from beginning to end. However, the readout is analog and […]

Floppy notes

Floppy Disk Notepad – More DIY How To Projects Pocket notes are such a better way to remember than depending only on the gray matter software. Maybe you have a box or twelve of old floppy disks. If you can find the ones with software labels like Aldus Pagemaker, or the like, all the better. […]

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 […]

Limpet Shell Electronics

Hannah Perner-Wilson put a small push button, battery holder, and LED/vibrating motor inside these little limpet shell. She writes: I’ve always liked collecting seashells, and have always wanted to do something more with them than accumulate them in my parent’s garden. So now I want to see how far I can go to integrate small […]