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...
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...
Earlier version of the device was reconsidered in terms of following aspects:• Accommodating for different refractive errors • Aesthetics • Ergonomics • Weight distribution OIO ASSEMBLY EXPLODED ASSEMBLY1. ACCOMMODATING FOR DIFFERENT REFRACTIVE ERRORS...
The last log has shown the results of the latest development work, which ensures that input data are correctly pre-sorted into ascending runs as they arrive, at the cost of more than doubling the working area (which is not surprising for a merge sort)....
The Z axis deviated from using the motors used on the X and Y axis. Instead a motor that was pulled from some random copy machine was used. The linear guides are some that were bought off of ebay coming from China. Not sure if I will go this route for...
The UPS-18650-NS is installed and working on my seismometer (I think.) The Raspberry Pi version that services the seismometer is a B+. The only way to know if it is working for sure is to disconnect power and wait 4-5 hours. Here's a photo of the installation:I...
Soldered up the one-shot circuitry. I'm now calling this sdramThing3.5, as it is no longer backwards-compatible with the old code without removing the chips from their sockets and jumpering some pins...There are two types of one-shots necessary:The Chip-Select...
How come there is no power socket in the middle of the field?After we solved getting internet uplink connection working we needed to tackle one other big issue - power.We take power (and most things) for granted, but we found our the hard way that during...
I installed the modified UPS board, and 100F supercap, into my heating system. It did not go well. The UPS would power the Pi and peripherals the first time that it was plugged in, but it would not apply power after a disconnection. I found two major...
I woke up and drew this. Some comments: Harvard arch - two ferrite core modules. One for program, another - for data. Each one has decade address input.Main dekatron counters - at least, four: Data counter. From 0 to 255.Address Pointer counter. From...
This is (hopefully) the last log. The project is complete at this point. There are some bits of code that is necessary to get the UPS working properly. Paul Versteeg upgraded the code to include a logging capability and also provided a service file for...
The joy of using hypermodern multiple e-beam direct-write lithography to "advertise" TTL technology from the 1960s... This is an electron microscope image of the Gigatron startup screen. This time it isn't displayed on a VGA monitor (or on a supercon...
Some sort of people are not convinced of what they don't confirm experimentally by themselves but are able to predict naive possibility. Yes I am, too.All the SD card are required to have mandatory lower compatibility to SPI mode. The key is, SD card...
Here's a new hand that matches ISO standard 9409-1-50-4-M6. https://www.thingiverse.com/thing:4495737With this you should be able to mount any robot hand off the shelf that matches. Basically anything that natively fits on a UR5 will work. ...
Crazy ramblings written prior to the decision to take on the Ridiculous TV-Board Venture [FAIL] in the previous log...Yesterday: pulled apart three LCD displays in an attempt to fight through brain-mush, didn't work, and ended up with a bunch of precariously-placed...