The Morse Riddler is a circuit I designed to be simple and cheap enough for kids and adults to use as a first soldering project, but powerful enough that they could have fun with it. In fifteen minutes, it can be soldered together and programmed to send riddles and their answers in Morse Code. Each press of the button will play one Morse Code message, which is either a new riddle or the answer to the last riddle. After a message, the chip goes into deep sleep to save power, not “waking” until the button is pressed again.
It’s a very basic circuit, just giving power from a coin cell battery to a microcontroller, and connecting the microcontroller to an LED and a piezo buzzer. The microcontroller is an Atmel ATtiny85 programmed using the Arduino development environment. A momentary switch grounds the reset pin when pressed. The firmware sends a message upon waking and then goes into low-power sleep.
I designed the circuit boards myself, and had them manufactured by OSH Park. You can order more of them through the link above. Like the other links, though, I’m not making money from this, I’m just sharing my work and sources to help other folks make stuff.
You can find my code on GitHub. You will see the functions for making dots, dashes, spaces between letters, and spaces between words. The code also contains a bunch of power-saving stuff that might be scary to a beginner, but it’s just there to let the circuit sleep between riddles. I’ll keep tweaking the code for clarity and power consumption.
When doing the workshop with kids, I give them this handout to take home.
My son wanted to learn to use a lasso, so I built us a Steve the Steer to play with. I have no desire to rope a live animal, this is just something fun to fiddle with in the backyard.
I was cleaning out the garage when I realized I had the parts on hand to make a dummy. The head was a scrap of 6×6 that I sculpted with a SawZall, bandsaw, and sanders. The horns were Hoppium IPA. The yellow strap on the head is a bit of climbing webbing, used to stabilize the horns. The body and legs are just 2×4, but I ran out, so he only has a single leg in the back. The next step is to add skis so one of us can drag him around while others try to catch him.
After I got the idea for the Mission Control Desk, it almost immediately occurred to me that we should have a spaceship of some kind to go with it. My son really did need a desk for school, though, and I had to finish that before starting on the spaceship.
This spacecraft is my favorite project ever. Not only was it challenging and educational for me, it will be great fun for the boys, while also encouraging them to work a lot of teamwork into their play.
Each Christmas, I like to participate in Cheerlights, an Internet of Things system for synchronizing the colors of multicolor Christmas tree lighting. To command the trees of the Cheerlights service, all you have to do is send a tweet with “@Cheerlights” and the name of a color. In the past, I built and modified a tiny desktop tree display. This year, I went all out, not only outfitting my big Christmas tree with color-changing lights, but also building a robot to roam the house and hunt for colors.
Meditation strikes a special chord with me as a maker because it is said to foster creativity, intuition, imagination, and fantasy. I can’t think of traits better suited to making. I’ve tried meditation in the past, but it didn’t seem to stick. When I saw that NeuroSky’s Mindwave headsets had dropped to $100, I couldn’t resist trying meditation again, this time with feedback. These headsets measure electrical signals from your brain and determine two main metrics: attention and meditation. The charts and graphs in the headset’s app worked well enough for measuring attention, but the very nature of meditation is that you can’t focus on charts and graphs while doing it. I set out to build a more peaceful and serene visual output for my headset, one that would actually serve to calm me even further as it displayed the depth of my meditation.
Part of what makes me a maker is that I prefer to do things myself when I can. I even cut my own hair. Nothing fancy, mind you, just a quick buzz cut with a trimmer. The tricky part, though, is cutting a good line across the back of the neck. It’s not only hard to trim, even using multiple mirrors, but it’s quite obvious when I haven’t been keeping up. Usually I ask my wife to help me, but I like to be self-reliant, and decided to see if there was a fun and educational way to trim it myself.
Pondering this problem, the two things that came to my mind were computer vision and automated heavy equipment. I figured I could use computer vision to track my head and the trimmer, and besides, I have long been looking for an excuse to learn about computer vision. I thought of construction equipment as a model because some control systems for bulldozers use GPS to locate the machine, and then adjust the blade according to the requirements of the site plan. In theory, the bulldozer operator could just drive back and forth over the site many times, and the control system would handle the height of the blade to result in a perfectly sculpted site. I set out to build a trimmer that I could blindly run up and down the back of my neck, and have it automatically turn on or off in accordance with its position.
Faced with a wiggly-toothed toddler, I realized that we’d be starting the old Tooth Fairy routine soon. Being a bit of a non-conformist, I began to dream up non-conventional ways that we might carry out the Tooth Fairy tradition in our house. I decided that the Tooth Fairy was probably getting overwhelmed by the increasing world population, and would appreciate it if we could send the teeth directly to her. I installed a pneumatic transport system in my house to make it happen.
In my latest “Making Fun With Jeff Highsmith” video, I demonstrate the building and use of a self-contained alarm system designed around the Raspberry Pi computer. The idea for the project occurred to me when my older son asked for help keeping his little brother out of his room. We had some great father-and-son time working on it. You can find a more detailed writeup, along with diagrams, flowcharts, and links to the code at the Make Magazine website. Here is the video:
For the second video in my Making Fun with Jeff Highsmith series on Make, I built Dr. Seuss’s Sneetches as well as the Star On and Star Off machines. You can find the post with links to materials on Make. Here is the video:
Let me know if you think of another Dr. Seuss contraption I should bring to life.
I love to make things. The medium isn't important, and I enjoy scrounging for materials and making do with what's at hand.