Update: September 2ndWe set up the arm rig to stress test some batteries. Great news! we may be able to rely on some pretty light and small batteries!With the goal of keeping the prosthetic robotic arm as light as possible, we intend to use the lightest...
Compiling the code for the first sensor board with a test code sketch occupied 98% of the available flash. A similar sketch on the new Arm design uses only 10%. Awesome...Only one revision manufactured by OSH Park has been created so far. It has a few...
I've had a couple of these modules for a while, but never got around to testing them. There seem to be even cheaper ones available now! If they work as expected, they would be a useful interface (USB alternative) from the ModAir hardware to a tablet...
At wiki the formulas for motion are to find in chapter uniform acceleration is the formula that describes the distance of particle after a certain time with an initial speed and an acceleration. with www.wolframalpha.com I solved the formula for the...
Got an LM317 to last long enough to graph this. The best control algorithm was an improvement over what was done 7 years ago. 2nd order derivatives & lead compensation were key to getting it just that stable. The problem is, to save space...
Convert the servo motor to a gear motor by removing the circuit board and soldering two wires direct to the motor (the motor I listed in the components has no end stop, so it is easy to convert). The various 3d print and design files are available in...
As previously seen, https://hackaday.io/project/176214/log/212713-propdrive-dreams the cheapest way to get more speed was seen as creating a modular nose cone rather than expanding the motors, using hotter windings, or expanding the battery. ...
At this moment, the process of validating huge statespaces goes like this, in 2 phases: Scanning the semi-arcs: the heavy and parallel phase can distribute ranges of arcs to scan, among whatever processing units are available. Each range will then create...
The PCB has in input resistance of [19.4kohm : 6.0kohm] and an input capacitive reactance of [4.2kohm : 499] over the audio range of 20 to 20kHZAt DC, the input resistance is about 21kohmThe equivalent capacitance is [2.11uF : 6.17nF] No issues with...
After three versions of the board and lots of software development I finally have a finished module that does everything that I originally envisioned, without bodges!It works on a cp/m RC2014, at 7 Mhz. It also works on a 32k RC2014, as long as the serial...
This probably doesn't make much sense, but the above image is snipped from my draft schematic over on Wokwi.com. Here's the link: https://wokwi.com/projects/370089092702920705 I have decided on a general layout for the components in the case as...
Added a second diode to enhance the detection And drafted some driver code that provides scan and decode that takes 98 bytes plus 5 RAM addresses. ; Scan Atari keyboard and single button joystick using ; and adapter with 74LS139 ; PSG IO addresses PSGAD:...
tl;drSamples must be dissolved in a separation buffer, which contains 3 primary components dissolved in water.Background electrolyte provides stable reference signal for the conductivity detector and does not migrate in an electric field.pH buffer resists...
Are you bouncing from blog to blog to find relevant Cricut Thanksgiving ideas? Then you have reached the right destination. As an expert, it’s my responsibility to share with you the personal experience that I found when creating the most impressive...
A wireless mailbox notifier lets you know when the postal mail has arrived in your mailbox. This can be particularly helpful if your mailbox is not immediately adjacent to your front door.The mailbox notifiers I've seen usually rely on detecting when...