CNC Engraving some kitchen floor scraps
I’ve been making trivets and wall plaques for a while. I’m almost done with my BIG machine for engraving large signs and 4×4 or 6×8 posts. I took a break…
MediaTek LinkIt ONE development platform
I was pleasantly surprised today when Fedex delivered a small package from Instructables. Inside was a MediaTek LinkIt ONE development board. This is an impressive board. Wifi Bluetooth, GSM, GPS,…
Quickie Garmin Ball Mount
I finally broke down an got my own Nuvi so I don’t have to keep borrowing my wife’s. Since it’s mine I figured why not mount it permanently in my…
CNC Pendant Code Test
I Finally got around to testing the code. I wired up a matrix keypad to a Leonardo. I used this cheat sheet of Mach3 keyboard shortcuts. I mapped the X…
MIT App Inventor in QST Amateur Radio Magazine
I just got the latest issue of QST Magazine and saw an article on making Amateur Radio Android App using the App Inventor. This seems to be turning up everywhere…
USB Coin Drop Mech for Ardiuno
I pulled this coin mech from an Asteroids cabinet I converted to Mame. it looks daunting with all these wires but its really simple. Most of that wiring is lighting…
Various Gauge Demos in AI2 App inventor
One of the first things I tried with the canvas element was a simple single needle thermometer. Next an old fashioned tube type thermometer. Then some simple side view gauges.…
Android Arduino Room Thermometer
Here’s the matching student demo for the MIT App Inventor Oven thermometer I made. This way students can test the thermometer simple by touching the sensor You’ll need some flavor…
Android Arduino Oven Thermometer
Here’s the demo for the MIT App Inventor Oven thermometer I made. You’ll need some flavor of Adruino, a Bluetooth SPP module, a max6675 thermocouple amplifier and a thermocouple to…
Heavy Duty BalUn or UnUn
First day of vacation and I wanted to tune up my Kenwood Ham Radio. Its a great working hybrid transceiver. It has 3 Vacuum Tubes. The driver and a matched…
Android OBDII Tool
After playing with AI2 for a couple of days and making simple apps to test different features I wanted to try to make a useful tool. I decided on an…
AI2 – the MIT App Inventor for Android
Last week my bus broke down on the highway. I took the time to check out whats new on instructables and I found a stereo remote control app made with…
ArduBlock – an Arduino Puzzle like Code Builder.
Another of the Scratch like interfaces. Might be another good candidate for the GRC or St. John’s Summer code school…. When you hit upload it makes a sketch in the…
Lithium Battery Holder
I have a bunch of things that use 18650 Lithium cells. Most have their own chargers but I wanted a way to use my iMax RC charger with these cells…
Arduino Based RC Thrust Dyno
It’s getting nice out and it’s time to start thinking about playing outside again. I have a few RC Airplanes. Some older ones like a nitro powered sig cadet or…
Meter Face Design Software
I picked up some nice meters and even though I don’t do much with analog I can still use these with Arduino’s and PWM. I needed an easy way to…
OBDII Breakout Board
Sometimes I need to work on a car’s PCM but dont want to go out to the garage. I made a little breakout board so I can run it on…
PT Surplus Kingston – Rhinebeck Car Show Trip
We had really great weather for our trip to P&T Surplus in Kingston and then to the Rhinebeck Car show Here’s a small sampling of what I found. More great…
74HC595 Shift Register Arduino Display
I got this display by mistake. I was buying a bunch of the MAX7219 displays and mistakenly added this one to the cart too. MAX7219 have internal multiplexing these 74HC595…
Sous Vide Update
I found an old satellite modem on the shelf in the garage. It had a nice sized display and 4 buttons so it seemed like a good box to use…
CNC Pendant
I wanted to make a small jogging pendant for my CNC machine. I saw these at the local Radio Shack closing sale. Simple matrix layout. Comes with a printable face.…
Generic LCD Bezel
I like to use salvaged LCD displays in my projects. to make them look good and easy to mount I 3D print a bezel. this covers up any irregularities in…
Generic PC Board Coaster
Not every prototype needs a case but sometimes its nice to have some protection for the bottom of the board. I usually just use a scrap of wood. Leftover laminate…
Simple Plating or Etching Power Supply
I threw together this simple power supply for electroplating, anodizing, or etching metal. There’s really not much to it so I used a cheapie electrical box from Home Depot A…
Component Tester
I picked up this little component tester off eBay for $15. Its a quick way to test parts as I assemble boards. I found a coaster for it on the…