So, part of this project will involve creating very fast light pulses (the photo-flashes), and part will be detecting fast optical pulses (the milk drop and bullet detecting photo-gates). The two, of course, are related in that a fast optical pulse generator...
IMU functions The Arduino 101 Inertial Measurement Unit is fully documented and works well. For the fall detection, the software detects a short period of freefall followed by a shock. Both events are handled via callbacks: void imuInit(void) {...
I might be missing a few connections yet which I'll correct as I come across them, but here is the pinout of the XC3S250E FPGA on the control board. Note that the SRAM and the Flash share an interface bus. Also note that the JTAG interface...
Ok, now it is kind of proven that binary CPLD (or FPGA) may implement ternary logic, but how we can integrate it with "true" ternary components, especially when CPLD is 3.3V and TRIMUXes are -5V and +5V? Answer is DG403 chips may do the job: Because...
First up, the latest revision. Small changes from the last version including tightening up various current loops in the buck converter and moving the battery-side transient TVS diode to the anode side of the reverse-polarity protection diode to...
Development on the V9958 board continues apace, and after a false start due to a silly mistake in the first revision things are back on-track with a revision 1 prototype. The design is now validated and working really well. So far it's baby-steps in...
In the first log I investigated the methods of growing bacteria, and extracting ,then purifying their PHA granules into usable plastics! A major roadblock is the usage of toxic solvents in the extraction and/or purification process. This means...
Ok, sorry about the clickbait title; who can resist the promise of LEDs? I promise a photo of a lit LED in this log, so you don't go home empty handed. This log is a quick one to introduce an intriguing potential alternative to coin cells. I have...
I get tired of fighting GCC's weird code generator that won't get a clue from my source code. I'm (still) using gcc6.4.1 (2017, I know) but I don't know how to make it understand basic things... This is critical at my level because any little performance...
PSRAM Challenges The PSRAM presented numerous challenges throughout development. One issue arose from the SSI clock divider, which could only be set to even integers. When the RP2040s were originally clocked at 266MHz to meet N64 SRAM timings and the...
First paper: Elastic wave modes for the assessment of structural timber: Ultrasonic echo for building elements and guided waves for pole and pile structures (DOI: https://doi.org/10.1007/s13349-014-0087-2, though that goes to a paywalled copy) by Martin...
Place View Count Followers Comments Skulls Project Author 1 32400 415 56 148 Bench Power Supply The Big One 2 19900 370 38 142 3D Printable Robot Arm Andreas Hoelldorfer 3 48300 273 112 120 Luka EV MW Motors 4 4600 101 20 114 Eye Controlled Wheelchair!...
FarmBot Genesis V3 exhibits the following changes from Genesis V2: Updated bracket design to minimize the number screws needed, making assembly easier and faster and decreasing the number of partsSimplified cross-slide design combining 3 plates into...