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The circuit board populated with its op amps, photodiodes and 80 superbright white LEDs.
Read more about the interactive LED coffee tables here
Hitachi PCB 14R9220 (PCB Swap, PCB Replacement, PCB Logic Board Sale, Buy PCB Circuit Board - HDDZone.com)
Printed on the back of the Epsilon PCB reads the following.
Copyright 2013 David Howaldn -- dhowland@gmail.com
The Epsilon keyboard (some assembly required) -- Designed specifically for salvaged keycap sets from G81-7000.
Thanks to geekhack.org, deskthority.net, kbdmania.net, otd.kr
Created using open source software.
My PCB order from Golden Pheonix arrived, a day less than two weeks after ordering them. Not bad turnaround!
The PCBs themselves are really nice and I have loads (ordered a panel though I'll only need one or two of each), though I'm yet to actually solder them up. I plan to use some solder paste I just got and reflow them under the grill, which I hope will work.
The only problem I've identified is that one of the PCBs is physically broken (a small bit snapped off when being cut presumably) which breaks two traces, but they'll be easy to fix with a small wire if needed.
They are for my current project - see if you can guess what it is!
Atari 2600 PCB composite. I photographed it from the top and bottom, cropped each to the correct size rectangle at 300dpi (perspective-corrected), and overlaid them.
Disassembled a Liveview (MN800), here is one side of the main PCB.
This design seems to be centered around a ST flip chip (U3), probably an STM32. The exact part marking is: "32F103C6" "8N KP9 93" "SGP 045 Z" "(ST logo) (E1 symbol)"
Chip by the antenna (seems to be "U1") is "2584A0" "AA037" "(E1 symbol) 103" "VQ TWN"
...with a grill!
I needed to try out my solder paste and wanted to reflow solder these parts, especially the tricky switch and SD card which would be a pain to solder by hand. I don't have an IR oven or a hot plate (or a reflow machine!) but I do have a standard home grill and figured it would be perfect: the fan moves the air, keeping everything the same temperature while the heating elements are overhead and far away enough to heat uniformly over the surface.
It took 5 minutes from turning on until every joint had reflowed (they started reflowing at 4min) and then I left them for a minute out of the grill to cool down. They seem to have soldered perfectly!
I'm still waiting for the parts for the other two PCBs, but the method seems to be great - and loads quicker than doing it by hand!
P.S. yea, it's not a very well regulated temperature, but I don't have a thermometer that could cope so it's pretty difficult to measure
version 0.0 of software for pcb layer analysis pictured. (see updated image). this software assists in reverse engineering embedded electronics. developed by vadik and myself. Pictured is a 2 layer business card we picked up from an analog synth dealer that we quickly mapped while waiting for lunch (<10minutes). True, it is an easy target but it exemplifies how this tool can be useful. Version 0.0 only provides manual tracing, which is still relevant though simple. Later versions will include auto-tracing of lines and vias. (layer 2 of the board not shown)
Seen Here: The PCB all soldered and with one LED matrix fitted.
Annoyingly, SparkFun are out of stock of the matrix I'm using, so I'm stuck with just one for the moment (can't find them ANYWHERE ELSE D: ).
So, today my PCB for the LED matrix arrived from BatchPCB! For what I paid, the PCB arrived fairly quickly - I ordered it on the 15/02 I believe, and it arrived 11/03 -- 26 days, which is pretty good (they state 19 business days).
The quality is very, very impressive - far better than anything I could pull off at home. The silkscreen and soldermask makes it look really nice, too.
Soldering it was a joy, although there was a LOT to solder and it's all surface mounted.
I had a few problems at first; it wasn't lighting the matrix at all properly but I soon realised with my new design (transistors on the cathodes) I have to write the transistors HIGH to get a LOW on the cathode, so a quick line of code changed to get that working.
Then for some reason the top half of every letter was flipped. It turns out this was my fault: I messed up when making the package for the LED matrix in Eagle, swapping the matrix's 5th cathode for my system's 8th, 6th for 7th, 7th for 6th and 8th for 5th. This was fairly easy to fix in code, however.
Finally USB isn't working to program or communicate, but I can configure the FT232RL chip (after all, it's sending the clock pulse that's driving my ATmega168). I think I have an idea of what's causing this, but I'm not sure yet.
I designed this little power supply for the tiny tube amp design I've been working on lately. And I finally got around to trying to learn how to use Eagle in the process, woo. After a bit of effort, and some cursing, I finally created the design above.
The image above, and a bunch of others, were generated by OSH Park during the order process so I could check over the Gerber layers before approving and ordering.
The PCB for M2FC, Martlet 2's flight computer.
The flight computer features three K-type thermocouple inputs, three strain gauge half-bridge inputs, three 1A pyrotechnic outputs, a full IMU (±20g and ±200g 3axis accelerometers, 3axis gyro and magno, barometric pressure), a micro SD card for datalogging and a serial interface to the radio and other peripherals. It's powered by an STM32F405VGT7 32-bit ARM microcontroller.
For more details on the schematics, see: www.cusf.co.uk/2014/07/martlet-2-electronics-schematics/
The PCBs were kindly sponsored by Cambridge Circuit company, thank you!
This is the sensor pcb module. An AVR controller ATtiny45 take 50.000 ADC samples/sec and give the results to the CPLD module. Into 40 usec detection from a fast flying insect in focus is possible. This module commes into the AF200/4Dmicro lens from Nikon. Only insects in focus give a signal output to the CPLD module.
Highpower controller for UV leds to capture insects in flight into the full dark. Frequence control and power is done via the AVR ATtiny26 controller. Insects like pulsed UV light. I can change the frequence of the lights between 50Hz and 1Khz. Normal 170 Hz is used. The UV lights are highpower at 400 nm and need 1.4A current/led. 2 UV leds and 2 withe leds are used.
This is a closeup of the "DSi Layers" image, showing what's under the NAND flash chip. This is a 256MB eMMC (embedded MMC) memory chip, with a JEDEC standard pinout. The DSi is using it in 4-bit mode, and all of the data signals are available either on nearby components or vias.
pcb I always thinking about making something out of PCB, which is the base of most of the computers we use today.Taiwanese manufacturers design and produce most of the PCBs today.