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The New Model
Log from Open Indirect Ophthalmoscope
The design models have been 3D printed and assembled. We made two devices, only the outer casings are different in the two models. One is printed on a SLS 3d printer (Nylon PA-12) and another one with an FDM 3D printer (PLA Black).Both the models are...

Tinymovr
Log from Ø32 BLDC Controller
Found out about the Tinymovr motor controller. Basically what I'm trying to do! Very cool, and my version 2 will use it as reference. I hope to make mine even smaller (27x27mm vs 40x36mm) and cheaper ($40 vs €89). I only need up to 13V (3S lipo),...

September 28th 2023: I can't make the linear actuator move precisely
Log from Automatic Moving Cricket Wicket
It was dumb to use a DC motor for this project. I should have just ponied up the resources for a high speed stepper. My plan was to attach a rotary encoder to the DC motor to accurately measure the number of rotations. This is not easy....First, I tried...

OS Upgrade and introduction of WiFi enabled device
Log from Open Indirect Ophthalmoscope
This log includes major upgrades included in the current system.Till now we had been using an older OS incompatible with RPi 3 since the display could have only worked with that image. Additionally it caused the trouble where the onboard or external...

Gathering information
Log from WD2002SJ Bench Power Supply
Tonight I gathered some reference/research material for this project. Fortunately, several others have done some really great work with this module, so here's credit to them: LTC3780 DatasheetBeyond Logic blog postTemplaro blog postGreat Scott videoJulien...

MiCS-VZ-89T a low power air quality sensor
Log from Portable environmental monitor
Putting everything together also requires checking everything separately first. So I did with the MiCS-VZ-89T sensor, and here is the story, also presented on my blog: MiCS-VZ-89 Air Quality SensorA low power sensor that can measure at the same time...

Z80 (CP/M) Writing to SD Card
Log from 3-Chip Z80 Design
Digging into SD card writes means shifting gears from the Boot BIOS source code since the Boot BIOS code only does reads. The CP/M BIOS code (CBIOS128.LST) which does the reads/writes after booting. Here's the BIOS code for writes to the SD Card: 0754...

Breaking AES using a $90 Development Board + OpenADC
Log from ChipWhisperer®: Security Research
Long ago when I started prototyping ideas, I was using a $89 FPGA Board (Avnet LX9 board). The ChipWhisperer system has always supported this board, but it's not as well documented as my newer, fancier hardware. I wanted to make a log post to demonstrate...

Researching Options - Power
Log from Boxies - Low power RF LED Cubes
I'd like to avoid frequently replacing batteries or running power wires to the boxes if at all possible, as such, I'm either wanting to have ultra-low power components and 'smarter' operational times (eg only show LED's when someones in the room) or...

Finally, some publicity!
Log from RasDash
An article recently published on MOONGIFT, a Japanese developer site, has showcased RasDash! The article is entirely in Japanese and Google Translate won't accept the URL as it has special characters but YANDEX does. Below are some links and a basic...

SDWire and SDMux
Log from sd card emulation
Pleased to discover there are ready to use, non-emulation SD card mux devices available! These are great for 99% of the use cases folks message me about. https://wiki.tizen.org/SDWire SD Wire https://www.tindie.com/products/badgerdnl/sdwire-usb-c-sd-card-reader-sd-mux/...

Fibonacci
Log from Gigatron TTL microcomputer
With the ALU verified and the RAM connected, today the breadboard determined that the first 8-bit Fibonacci number is 144. 0000 0000 ld $00 ; outer loop 0001 c200 st [$00] ; a=0 0002 0001 ld $01 ; b=1 0003 fc0a bra $0a 0004 0200 nop ; (pipelining) 0005...

Log #89 - CondomBoard specifications
Log from Internet of Condoms
Size: about 50x50mm (size of condoms I have, could be a little larger if required)Layers: preferrably a single 2-layer PCB, for easier ordering at the usual suspects in ChinaConnections: debug UARTMicroUSB for charging the batterytemperature sensor connectortwo...

Removing undesired reflections/spots
Log from Open Indirect Ophthalmoscope
Hey all!This is another project log to update the latest developments of OWL (Just in case you forgot, we call it OWL because, well, Open Indirect Ophthalmoscope, OIO).So, since the last time I made a log, we’ve been working on--making an elegant GUI...

FlexSEA-Plan
Log from FlexSEA: Wearable robotics toolkit
FlexSEA-Plan is an embedded computer used for high-level computing. It boasts a powerful processor and can run an operating system such as Linux. Developing code on this platform is similar to the regular (i.e. non-embedded) software development process....

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