It’s winter and the air in my house is dry, humidity at about 30%. That’s too low to be comfortable. I’ve lived in my new place for less than one year so the low winter humidity hadn’t been a problem for me yet. Good thing there’s a whole-house humidifier on the forced-hot-air heating system. I’ll just turn that on, right? Wrong. I don’t think this system had ever worked since it was installed…. Continue reading
I admit it, I’ve left my garage door open all night… a few times. Doing so leaves all of my precious spare parts exposed for the taking! And maybe more importantly, provides access to the inside of my house…. not a good situation. I’ve been thinking about making some sort of indicator (inside the main house) for when the garage door is open. This would alert the home owner (me) that the garage is open.
After thinking about it for a while, I believe I came up with the simplest way to do this….
Some Graphics Cards for desktop PCs require a lot of juice to work, sometimes even more than the PSU Power Supply can output. And if you decide to run dual monitors with dual Graphic Cards, then one Power Supply may not be enough. There are a few options to elevate this situation. Purchasing a new hefty PSU would result in a tidy but expensive solution. A more DIY-friendly and significantly less-expensive solution is to add a second PSU (which you probably have kicking around) and delicate the 2nd PSU to your Graphic Card(s).
There is one tricky part to doing this, the PC motherboard controls when the PSU turns on and off. This post will go over how to automatically turn on/off the 2nd PSU with the PC.
A few days ago I posted how my wireless phone charging hack was a failure. I tried soldering in a Qi Receiver into my old school Samsung Galaxy Exhilarte SGH-i577 phone. While I got all the goodies crammed in the phone, the phone got waaaaay hot when charging. So much so that the phone gave a warning saying the battery is over-temp and charging was stopped!
Fast forward a couple days. I figured I could try a different charging pad. Guess what? It worked perfectly and the phone didn’t get hot! I can’t explain it. I’m not a Qi expert but I did poke around on Wikipedia to learn more about the Qi technology. From Wikipedia:
“Regulation of the output voltage is provided by a digital control loop where the power receiver communicates with the power transmitter and requests more or less power.”
I’ll be the first to admit my phone is old, very old, but it is small and fits in my pocket nicely. Majority of new phones seem to be near-tablet size. I did want an upgrade and I thought wireless charging would be the way to go… here’s my disappointing story:
You’ve most certainly seen those Qi Wireless Charger Receivers that plug into the micro-USB port on a phone and make your phone have wireless charging capability, right? They are only a few bucks on eBay. I bought one knowing it wasn’t what I wanted because it uses the USB port and it required the use of a phone case to keep it from flopping in the breeze. When I received the charger receiver, I also noticed that it would cover up the flash and part of the camera. The charger receiver was too long:
No, it’s not done yet but the iTopie project continues. As you can see, the frame is painted, the parts are printed and the assembly process is well underway. I’m very satisfied with how the frame came out. It is solid and my added handle is the bee’s knees. The handle is slightly rearward of the current CG but I will try to fix that by putting any additional components as far rearward as possible. It’s still a handy handle, though!
When starting or ending a motorcycle ride, you’re most likely putting the bike away in a garage. Like paying tolls on a bike, a simple task of opening a garage door becomes just plain inconvenient. You either have to get off the bike to manually open the door or dig around in your pocket for the garage door opener that you might have forgotten. I’ve seen some people velcro the garage door opener to the bike but that looks kinda hokey. This slick hack solves that garage door problem is definitely a DIY-friendly project. Continue reading
There’s a new TV setup at the Bremster household. Flat screen on the wall with no visible wires. There’s one problem though, my WDTV media player. It’s small but still a tad too awkward to be precariously balanced on the top of the TV. Plus, the power, ethernet and HDMI cords sticking out the back don’t let the media player stay aligned with the TV. So what’s a dude to do? Design and 3D print a sweet bracket of course. Continue reading
With the Wade-style RepRap 3D Printer extruders, the part that actually drives the filament is a ‘hobbed bolt’. A hobbed bolt has a little toothed-groove around its circumference that grips the filament and drives it into the hot-end as the bolt is turned. There’s a few ways to make a hobbed bolt. We’ll show you one way here that utilizes a Tap and Milling Machine.
For a typical Wade-style extruder, an 8mm bolt is used. Since we want to cut the toothed groove completely around the bolt we need that bolt to rotate. What better way to do that than to mount it in a pair of bearings. Regular skate bearings (608zz) have 8mm inner diameters and are actually what are used to support the bolt in the Wade extruder. I designed up a quick 3D-printed bracket to hold a pair of bearings and provide some features for easy clamping in the Milling Machine’s vise. Continue reading
I’ve had the honor of mentoring a local High School’s FIRST Robotics team. Their robot runs on a 12vdc battery. During most of the testing, the robot doesn’t need to move too far, and watching the battery charge just seems like an unnecessary item to monitor. So, the alternative is to make a cheap, dedicated power supply.
This thing started off as an old discarded laptop(or similar device) power supply. It had a plug on it, emphasis on ‘had’. It got chopped in order to add a couple of binding posts. These bad boys will accept a bare wire or banana plug. I designed up a couple ‘caps’ and 3D printed them. They are pretty simple and made to fit a little snugly over the power supply. Eventually they will just be glued on to the power supply housing.