The SunVolt Portable Power Station is a portable solar panel that can be used to charge cell phones and tablets. There are actually two models, the SynVolt and the SunVolt Max. The first outputs 10 watts under optimal conditions, while the Max is rated for 15 watts, with 8-14.4 volts juicing your device. The SunVolt […]
This weekend, my buddy Jon came over, and we used my garage chem-lab to silver-plate some brass hinge leaves for some fancy jewelry boxes he’s making. I had never electroplated anything before, and have been curious about the process since my undergraduate days. My impression, based on my survey courses, was that electroplating is messy and dangerous—one of those jobs it’s usually best to contract out to a speciality shop. Jon came prepared with a bucketful of supplies. He had the parts themselves, a benchtop power supply, a strip of stainless steel to serve as an anode, cotton plating pen tips, a strip of 0.999 silver to wrap around the pen tip and connect it to the PSU probe, copper wire to support and ground the parts during the plating operations, and three bottles of MIDAS-brand electroplating chemicals. (MIDAS, for the record, is Rio Grande’s house electroplating products brand.)
The slide rule may be a quaint anachronism in this age of ubiquitous computing, but there’s still a place for the slide chart, the volvelle, the nomogram, and other hand-held “paper computers.” These are still published by a few companies, and are a handy source of on-the-spot reference data, particularly in field or workshop environments that may be inhospitable to or inconvenient for electronic devices. Slide charts containing key screw, bolt, and nut data have been around for decades, and the folks at Great Innovations identify TAD’s Universal Reference Calculator, discontinued in the mid 1990s, as inspiration for their chart.
QU-BD (pronounced “cubed”) is a recent startup that sells parts for 3D printers. They sent us a few of their silicone heaters to review. The heaters were designed for use in a heated build platform (which is required for warp-free ABS prints) and come in three different-sized square pads of 150 × 150mm, 200 × 200mm, and a giant 300 × 300mm. They are about 3mm thick and a 100k thermistor is built into each pad for measuring their temperatures. The build quality of the heaters is quite robust. The pads are made of a flexible fiberglass-reinforced silicone…
The Optrix XD is a tough-as-nails iPhone 4/4S/Touch case with a built-in 175-degree wide-angle lens and is designed to mount on a bike, car, or some other vehicle, giving you great videos while protecting the phone. Optrix claims mil-spec durability with regards to impact, particle resistance, vibration, and water immersion. You can still control the […]
There’s nothing especially complex about these pliers from prominent jeweler-supply house Rio Grande: one jaw features a rounded bending mandrel about 5mm in diameter and 20mm long, and the other, a cupped steel band holding a nylon forming block with a matching V-shaped groove. The cool part is that the nylon block is removable and replaceable, so if you have access to a 3D printer, you can print your own custom jaw inserts and mount them in place using small wood screws.
Dremel’s new rotary tool EZ-change sanding mandrel makes quick work of changing sanding sleeves.
