Hi! You might remember me from the last two threads in this group..(not all that active I see). Anyway, I'm still dabbling with that same project where I'm trying to capture an image from inside a transparent sphere. I've got the hyperhemisphere, and I've got a few ideas for how to manage...
I would like to run a smartphone using a primary battery instead of rechargeable for a project I'm experimenting with.
Most phone batteries will have a connector of some type with 4 contacts. Of course two of those I'd expect to be +- Voltage, but the other two compose some sort of mystery input...
Hi,
I'm evaluating a concept that is similar to this vintage bath spa/jet system- particularly in its use of AC power. Modern similar products tend to use a DC converter at the plug or inline with the cord.
The reason this configuration uses AC is because it contains a heater and would be...
Hi,
So I didn't think I'd have as much trouble as I am in prototyping what I've learned is called a "hyperhemisphere" (at least among the SPDT people). Basically a hollow globe with a hole in it around 30-50% of the diameter- similar to a snow globe. In fact, we used a mini glass snow globe...
Page 5 of this datasheet has a nice list of outputs from a remote module camera sensor that seems very well suited for my project. However, I will have to wire necessary wires to a slip ring to make this work with continuous rotation.
For that reason I need to determine how many of these 24...
I'm making a short run production of an assembly for which I have received 24 wall mount spring timer switches. Each has a knob you twist (you know the type: "turn past 10...") but in my application, we're attaching the switch 3/8" away from the knob. As such, it's really hard to get a good...
I've recently built a very small electromagnet the size of a pencil eraser. It works, but I would like to improve it. It is not a high precision application- right now I'm just shooting for "better". I already understand that I can use more turns of a thinner wire to yield a coil which operates...
So this video is going around lately- pitched with a slant toward consumables analysis via "spectrometer" (at least in the initial video). The fob-sized device interfaces to your phone and references a growing database to make its determinations. It's a $250 device I'd love to have if its...
Hi,
I have a system that I want to move fluid into and out at exactly the same rate. In the middle of the system is a reservoir that will be subjected to a maintained high vacuum. Even when the system is not operating, I would like this vacuum maintained indefinitely, consequently I'm left...
Hi,
I've designed some parts with undercuts allowed by soft overmold before, but never anything quite so dramatic as a fully formed suction cup. I have an application for a small (3")electronic device which will have co-molded TPU or PVC over the vast majority of the exposed surface. It would...
(As opposed to the typical perpendicular flow)
In other words, is this going to work? I have a small diameter motor & concentric fan blade confined in a cylinder and I need to move some air. Of course I could use a conventional propeller, BUT I want air to move in the same direction regardless...
Hi,
I'm a ME currently dabbling in EE tasks for this prototype. I actually just purchased this handy coil kit, and I'm eager to play around with it. Naturally the coils aren't coincidentally the exact dimensions I need, but they're not too far off so I have a few questions (& this is only for a...
Hi,
I'm a ME currently dabbling in EE tasks for this prototype. I actually just purchased this handy coil kit, and I'm eager to play around with it. Naturally the coils aren't coincidentally the exact dimensions I need, but they're not too far off so I have a few questions (& this is only for...
So I'm back designing a product for a client and dreading the UL phase we'll eventually get to. I'm always happy to job this out but everyone's always shocked when they get the tab from UL. I can understand a reasonable fee for testing services, that's all well & good (definition of...
Hi,
So I had an idea recently while working on a client's project that was inspired by a plug in air freshener. (See here). I've worked on some thermal heating projects before and used PTC's, Tube heaters, Cartridge heaters, and foil heaters. The thing about this project is that we only need...
Hello,
I am working on helping a factory develop their prototype for the toy market. This product is not a cigarette, nor smoke meant to be inhaled, however the element I'm working with is intended to generate cosmetic smoke. This is similar to the toroidal/vortex smoke ring gun sold by Zero...
Hello,
On a project I am involved with, we are seeking to increase visual contrast/brightness in order to better distinguish objects of interest from background ambient light. There are two questions somewhat related to this task, and one involves consideration of band pass filters- of which I...
Hi!
So I'm working on a small project currently in which we are carbonating tap water. We don't have a proper CO2 meter in our lab, and this project's budget does not have the space to buy one. However, my understanding is that rapid cabonization of water via CO2 gas will produce a byproduct...
thread804-78534
I just came across moltenmetal's very helpful post regarding use of Titanium Dioxide in the course of water treatment efforts. Honestly, I'm not a chemical engineer so much of the discussion was outside of my experience- I wasn't able to derive a clear answer about the...
thread404-306476
Funny story: I googled "mechanical toggle mechanism" and came across this old thread describing exactly my desired mechanism. I started to reply only to realize that it was my own post from some other project! I guess I forgot to reply with a diagram, and I'm again looking...
