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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...

Making the frame
Log from FLED
Now we wanted this display to look really sweet since it will be on our office wall for some time to come. To make it look gorgeous we decided to make the frame out of white foamed PVC board, and the front diffuser out of 1/4" thick white acrylic.First...

A working display!
Log from FLED
Finally Ivan screwed the backboard into place. One of the great things about using Foamed PVC is you can basically treat it like wood, it holds a screw well and is easy to cut and saw.With our fingers crossed we switched it on, and to our delight we...

Nginx and Memcached
Log from FLED
With FLED we are trying to make a visualization platform, somewhere all our apps and monitoring tools can send data and where we can then use that data to make interesting visualizations.As such we need to be able to accept data from a variety of sources...

Power And Reset Circuits
Log from MC68000 Computer
Since we're using an ATX power supply for this computer, there is a little magic that needs to happen before it becomes a proper power supply. Besides the usual orange, red, yellow and black wires attached to a 20-pin connector, there are also a few...

Theory of a CPU module
Log from MC68000 Computer
Compared to the 8080, the Z80, the 6809, 6502, and all the other 8-bit microprocessors used in boxxen of yore, the CPU I’m using for this project - the Motorola 68000 is both extremely powerful and extraordinarily complex. The power comes from a huge...

Theory of RAM and ROM modules
Log from MC68000 Computer
Although it might make sense to start this project by building a CPU module first, I decided it would make more sense to start with the memory for this system. This serves two purposes: as an explanation of how the 68000's memory-mapped I/O works, and...

A Long, Long Overdue Update
Log from MC68000 Computer
Quick story. I brought this computer to the Vintage Computer Festival 9.1 last year to show Bil, Dave, and all the other cool people at the event. At the time, I was freerunning the processor, watching the blinkenlight count up. Great stuff, and proof...

Meeting in the Middle
Log from MicroMicro Processor
Simultaneously designing top-down and bottom-up until your designs meet in the middle to produce a functional result. →InsertImageThat sounds like a horrible idea.→InsertImageFor this project, this was the only design strategy that made sense,...

Forklift Donation
Log from Electric Car Conversion
When we started this project, we didn't actually know how we were going to finance it, or where we were even going to get some components -- but we set the wheel in motion and struck luck!→InsertImageWe had sent out a few sponsor emails to local companies...

Autobots Assemble!
Log from Electric Car Conversion
Now that we have a car and a motor, we need to fill in the gaps. First off is coupling the motor to the original transmission of the car.→InsertImageIn machine shop class I replicated the spline pattern found in the pump motor -- first on the lathe.→InsertImageThen...

A little Arduino goes a long way...
Log from L.A.S.E.R. Tag Control
Yes yes, I know, Arduinos are lame. But... they are incredibly handy for getting certain things done really quickly.→InsertImageFor the control system we need to emulate a USB keyboard, it just so happens the Arduino Micro is especially good at this....

Badge PCB's Arrived
Log from LayerOne 2014 Conference Badge
After delays, e-test errors, shipping problems, wild fires and 6 revisions. These completely untested hopefully 4 layer PCBs have arrived. I'm probably just being paranoid but they sure look like 2 layer.Also Arrow decided that I didn't want overnight...

Preliminary BOM and rough costing
Log from Arduino-Compatible FPGA Shield
Did a preliminary BOM today and selected a few key components, incl. the Spartan 6 variant I'd like to use and the SDRAM and Flash devices (may go with a BGA SP6 package with more IO...no risk yet to the design, regardless of what I choose). All...

Decoupling Schema Completed
Log from Arduino-Compatible FPGA Shield
FPGA decoupling can be tricky to sort out without some guidance. Thankfully, Xilinx provides a pretty comprehensive PCB Layout guide that has specific recommendations for decoupling schemas for the PCB, based on specific parts and pin counts. I...

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