Twice in the last couple of years I have needed a probe to diagnose problems with a non-isolated power supply that connected directly with the 125VAC mains voltage here in the USA. I have been able to work around it by using less than satisfying methods....
I cut a sheet of plexiglass to use for a backplane. The Pi, hub, breakout, etc were all mounted with standoffs and 4-40 hardware. The backplane was then mounted to the cabinet in the same way. This looks like it'll be a really nice way to keep everything...
The lion kingdom added a 2mm puddle of perfume on the bottom of the gatorade bottle & filled it with water. $1.25 store perfume in the swamp cooler is quite pungent, but it didn't clog it. It already handled tap water without getting clogged. ...
Build a default GH60 layer from http://www.keyboard-layout-editor.com/ (more information on https://dionmunk.com/posts/2017/05/10/gh60-satan.html)The space key value should be "SPACE", not "" like on the default GH60 presetHere's my current setup : Layer...
The power supply can be divided in 3 main parts:- Current sense- Voltage regulator- Voltage adjustment and inputsThe current sense consists in a 1Ohm resistor on the high-side and an amplifier. The output of the amplifier is 1mV/mA. This value will then...
I simply used an 8 foot closet pole, the kind normally used in a closet to hang hangers on. It's a good diameter at 1.25 inch, relatively lightweight and quite stiff as it's thin steel. They do make a heavy duty version that is much heavier,...
We'll be creating the Lou portion of the project. If anyone is interested in building the occupancy detector (using the magnetic door switch and light sensor) let me know!A few more parts: All the major components are listed in the component section,...
STEP 5: COMPLETE THE TOP BUILD - With the Bottle Cutter, along with the Head and Blower Fan...These Parts can now be mounted onto the base frame along the 2 - 2040 Rails. Attach the Cutter Plate towards the right side of the frame. Set the Screws and...
previously the steering column was 0.5” tube, sealed ball bearings, and a 1.25” OD as a housing. I worried that the 0.5” tube, extended about 11” to the handlebar, could easily bend or break.Using the same seats for the ball...
The first version of the firmware is now really complete. There were a couple of bugs discovered since the last time I said that:all calls to msc_xfer_blocks() results in a callback to the xfer_done() method, including the call after a write with block...
Updated designAfter the first successful (success == not flying apart) rotor test last week, the design was tweaked to change the orientation of the servos so that the centrifugal force held the internal gears in place instead of tearing them out. The...
I re-designed the programmable voltage source used in the analyzer; the new version could easily find use as a general-purpose computer-controlled lab supply. Here's a simulation of the back-end, ignoring the DAC and voltage reference for the moment:The...
After the first failure, I learned how to design my own instrumentation amplifier from the internet and got to know that you just need 3 operational amplifiers and 3 pairs of closely matched resistors to make it work. At first, I designed it on...