My 3D printer broke down and since I needed a 3D printer to fix it I purchased a inexpensive DIY kit. These are a few of my first thoughts. Also a quick word about connecting to Simplify3d.Read more "Tronxy Prusa i3 P802MA – Build, Setup, and Initial Thoughts"
I aquired a car USB charger in need of repair and was inspired by a recent video from the EEVBlog to measure the power efficiency. The device become damaged when the insides flew out during insertion into the 12VDC car jack and the inductor was nearly sheared off the PCB. I was able to reinstall the inductor and slightly modified the circuit for easy measurements and connection to my DC electronic load.Read more "DC-DC Converter Effeciency"
…the thief said “Let there be light. Behold a single candle lit by the joules of a dead cell.”
There is something about LEDs and the joule thief circuit that keeps me coming back. This time around I went for something festive for the December holiday season along with a SMD transformer, no longer will I have to hand wind toroidal transformers.Read more "Single LED Joule Thief Candle"
Since June of 2016 I have been logging atmospheric pressure using a Raspberry Pi B+ and STEVAL-MKI165V1 evaluation module which features the LPS25HB atmospheric pressure sensor. The Raspberry Pi uses a small Python program I wrote to log the pressure data and time to the system SD card and also plot the past 24 hours […]Read more "Atmospheric Pressure Data Logging and DST"
My quadcopter has been grounded for over a week now. The last warm sunny day of October I went for a normal flight session only to find that the front right motor was not spinning. No spinning motor, even one, no fly. Back at the workbench I discovered that the ESC had given up on […]Read more "ZMR250 Quadcopter Upgrade – Matek HUBOSD Eco H-Type"
I transport my quadcopter and radio controller using a backpack. I have found it to be more convenient then a large aluminum hard case. I also store a few spare props, prop nuts, tools, and zip ties in it for quick repairs in the field. This arrangement works great with one minor annoyance, the radio is not protected as much as I would like and often times the switches will get bumped during transport. The FrSky Taranis came with a nice hard aluminum case but it is to large to fit in the backpack and too cumbersome to carry to the field, I prefer to carry as little extra with me. With this problem in mind I set out to solve it by making an insert to surround and protect the RC radio.Read more "RC Radio Backpack Insert"
I repair a dumpster find Fisher MC-3000 Integrated Music SystemRead more "Fisher MC-3000 Receiver Repair"