So the previously posted code was working well on the breadboarded version of my project, so I started soldering it into a more permanent form. All was working well until I tried to add a volume knob to the audio output, and now all I get is a loud hum in the speaker when powered […]

New project, new code….

/* Rotary encoder: Connect the middle pin of the three to ground. The outside two pins of the three are connected to digital pins 2 and 3 Encoder button on pin 4 with a pulldown resistor DFPlayer module connected to digital pins 10 and 11 OLED connected to i2c SCL/SDA */ #include #include #include “SoftwareSerial.h” […]

Arduino ethernet gizmo

Ordered an Arduino Nano a while back along with an ethernet shield that plugs right on to it. Finally got around to messing with it last night, and built a prototype tester: What I’m aiming for here is a small handheld device I can use at work to test data jacks to see if they […]

Hall Sensor test.

The Hall Sensor finally showed up from China, and I wasted no time in rigging up a redneck gizmo out of cardboard to test it: The Arduino is now reading the pulses from the Hall Sensor (rather than the pushbutton I was using before), and converting to MPH. All other values on the display are […]


Gah. Shipping from China is so hit or miss. I ordered some various Arduino parts from China, all around the same time. Some got here in a week, some got here in two. Some I still haven’t gotten, so my project is stalled. That’s ok, I’m thinking about messing around with some hydroponics in the […]

ATX Breakout Box

Working on these Arduino projects has left me wanting/needing a bench power supply, but I'm finding those things to be fairly pricey. Watching YouTube one day, I ran across a bunch of people that were hacking apart old ATX power supplies salvaged from discarded PCs, and breaking out the various voltages that are produced. “Brilliant!” […]

Cleanup on aisle 5…

Spent the morning cleaning up the code, changing all the “button” references to “sensor” for that eventual day when I get an actual sensor, and started fiddling about with the other three values that are going to show up on the display, namely system voltage, water temperature and oil pressure. It was in doing these […]

Learning to talk to the display

Figuring out how to talk to the display, and get the MPH to actually display where I want it to. This is try number three or four, and it’s starting to look good. I couldn’t push the button quite fast enough this time to get a two digit MPH, but I did figure out how […]

Solder time!

My cheap little display came without the headers attached, so it’s time to get soldering. My Grandpa would be so proud. And… It’s alive!!!

More goodies

Got a package from China in the mail yesterday. No sensors yet, just the second Arduino and more LEDs, switches and wires and such. Also included in this package was a 16 x 2 LCD display, so this weekend I get to figure out how to send text to it rather than to the serial […]