[Proto G] recently wrote in to share a very slick way of keeping tabs on all the tiny PCBs and devices that litter the modern electronics workbench. Rather than a big bulky PCB vise for each little board, he shows how to make tiny grippers with magnetic bases for only a couple bucks each. Combined with a sheet metal plate under an ESD mat, it allows him to securely position multiple PCBs all over his workspace.
The key to this hack is the little standoffs that are usually used to mount signs to walls. These already have a clamping action by virtue of their design, but the “grip” of each standoff is improved with the addition of a triangular piece of plastic and rubber o-ring.
With the gripping side of the equation sorted, small disc magnets are glued to the bottom of each standoff. With a suitable surface, the magnets are strong enough to stay upright even with a decently large PCB in the jaws.
An especially nice feature of using multiple small vises like this is that larger PCBs can be supported from a number of arbitrary points. It can be difficult to clamp unusually shaped or component-laden PCBs in traditional vises, and the ability to place them wherever you like looks like it would be a huge help.
We’ve recently covered some DIY 3D printed solutions for keeping little PCBs where you want them, but we have to say that this solution looks very compelling if you do a lot of work on small boards.
Continue reading “Invasion Of The Tiny Magnetic PCB Vises”
Every electronics project of sufficient complexity needs standoffs – little plastic or metal cylinders – to mount boards to one another. Keeping hundreds of little plastic trinkets around doesn’t really fit with the hacker mentality, though: it would be far simpler to keep some Delrin rod stock around to drill and cut standoffs as needed. [HomeCSP] created a device to do just that, allowing him to turn 1/4″ Delrin rod stock into any size standoff he needs.
Before building this device, [HomeCSP] was taking plastic rods to the drill press fitted with a very tiny drill bit for a #2 screw. The problems with that technique should be evident to anyone. The new solution uses an old cordless drill and a 6 inch piece of linear rail, effectively turning some bits of scrap into a horizontal drill press with a stationary bit.
The end result is a machine that can bore a hole straight down a 1/4″ rod. With a box of screws these homebrew plastic rods are much cheaper than off-the-shelf parts and can be made in any length desired.