I have been using my new Aquarium Computer for a week now. It’s performance is great, but that is subjective, because I built it for my own needs and I feel that it meets them perfectly. The circuit I built for it is having problems, I will investigate further.
My trusty laptop is showing its age. 8 GB of RAM is not enough for the amount of 3D stuff I do now, and it can’t run the latest games at all any more. Since I got a full time job now (instead of a constantly travelling student), it’s time to get a desktop PC (first PC build, yay). But the process of building a PC is pretty boring, it’s just an exercise of picking out compatible parts for the right price. I decided to make it slightly more interesting by submerging the entire computer in a fish tank full of mineral oil.
UPDATE March 2015, I added a funny naked HDD activity indicator
Some pictures from the build process
Short Story (long story later, technical details and stuff):
Intel i7 4790S, Nvidia GTX 970, H97M chipset, Corsair CX600M. Built onto a polycarbonate tray that is then dipped into a fish tank full of mineral oil. Fancy features like bubbling treasure chest, NeoPixel LED strip, oil pump+radiator, temperature monitoring, removable SSD.
(part list? fine… here… these are not the prices I paid but here it is http://pcpartpicker.com/user/frank26080115/saved/HFDmP6)
Comments and questions are welcome, I would love to chat with you!
Reddit posts, please upvote: http://www.reddit.com/r/battlestations/comments/2pdd3q/aquarium_computer_mineral_oil_submerged_details/ and http://www.reddit.com/r/buildapc/comments/2pdeak/build_complete_aquarium_computer_mineral_oil/
Hi Hack a Day visitors, small correction: there’s 32 GB of RAM, I just didn’t put the same item twice in the part list.
News/Updates will be posted at the bottom of this page
Long Story… Continue reading
Most micro (palm sized) quadcopters are RTF and comes with a crappy cheap transmitter, and I really want to use my awesome expensive Taranis. I found out that Q-Bot comes with a tiny transmitter module that I can connect to my Taranis.
I didn’t want some ugly thing dangling off of my Taranis so I decided to 3D print a module that will contain the Q-Bot transmitter circuitry and plug into the Taranis’ module bay, which fits “JR” style transmitter modules.
The 3D files (SLDPRT, STEP, STL) Continue reading
3D printed using my Ultimaker2 and many colors of PLA plastic at 100% in-fill. It is my first design, featuring folding arms, tucked away electronics, and anti-vibration mounted flight controller. It is designed to be friendly with FDM 3D printers, employing some special techniques. The frame is extremely strong.
I need more practice. I need to buy a few more propellers and few more batteries as well so I can practice for longer.
Flight controller is a Continue reading
Continuing from my previous FrSky X4R-SB hack (read for some context), I really wanted Smart Port telemetry to work with Naze32. I forked the original baseflight firmware and added two key new functionalities:
- implemented the Smart Port telemetry protocol
- GPS can be assigned to any serial port (as opposed to only one port)
- this is important because we are running out of ports
- I made it possible for GPS to be connected to software/bitbang serial, to free up a hardware UART
Update 10/26/2014: I was asked to make the same contribution to Cleanflight, which I have done today.
The new forked firmware requires a circuit modification on both the X4R-SB and Naze32, see pictures: Continue reading
I am building a quadcopter using a FrSky Taranis X9D radio. It came with a FrSky X8R receiver. I wanted to keep my wiring clean by using the S.BUS feature on the FrSky receivers, I purchased a smaller FrSky X4R-SB receiver. The X8R has 8 PWM channel pins and the X4R-SB has 3 PWM channel pins, but if I use S.BUS (which is serial, not PWM), I can access 16 channels using only 1 pin, on both X8R and X4R-SB. The X4R-SB is much smaller, making it more ideal. (do not confuse the X4R-SB with the D4R-II, this is important, D4R-II uses CPPM, not S.BUS)
(update 10/25/2014: a follow up hack for Smart Port)
I want to use a Naze32 flight controller, which is open source and does have code to interpret S.BUS protocol. S.BUS is UART communication but it is inverted and the Naze32’s UART cannot accept inverted input. Continue reading
More reviews/ranting (I am still in temporary housing, I can’t do much fun DIY stuff, but I have been buying things)… Continue reading
Just two rants… Continue reading
My project involving the PlayStation 4 and DualShock 4 has caught the attention of Sony, and after interviewing me, Sony Computer Entertainment America hired me as hardware engineer for PlayStation peripherals. Today is the day I take a one way flight from Toronto to San Francisco, and tomorrow will be my first day! Follow your passion, don’t be afraid to fail, and don’t be afraid to show off your skills.
And since I’m leaving my family… Continue reading
I have a PlayStation Gold wireless headset, for chatting with people I play video games with. It usually recharges via a USB cable but I wanted a recharging stand for it, so that the USB connector does not suffer from wear-and-tear and I don’t have to worry about managing yet-another-USB-cable.
More pictures below Continue reading
I wanted to make a transparent circuit, made with clear acrylic plastic, and the circuit pattern is etched onto the plastic using a laser cutter. The etching forms a groove that is about 0.1mm deep and 0.8mm wide, this groove is filled with conductive ink to form a circuit.
I attempted this experiment, but was met with… Continue reading
Summer is coming so I was worried about cooling the PS4. This stand lifts the PS4 off the desk a bit to give it more airflow. I had this cut by Ponoko, using 9mm thick clear acrylic. If you want to make your own, click here to download the EPS file, follow Ponoko’s instructions.
Another way is to 3D print them using black ABS, but I don’t have a 3D printer. The acrylic is left over from another project, hence why I used it.
This is a simple 6 port USB device charger with a individual current monitor on each port. The charging current is indicated using RGB LEDs. Blue means slow charge (under 250mA), green means 250mA to 750mA, red means over 750mA, and purple means over 1500mA (for tablets). This circuit involves an ATmega328P (if you do hobby electronics, I bet you have plenty spares of these), INA169 (check out this breakout board), and a OKR-T10-W12.
While this project is not as impressive as my other projects in terms of difficulty, I soldered and Continue reading
I am doing a project that involves a K10DX128 microcontroller from Freescale, which is advertised to have 128 KB of flash memory and 16 KB of SRAM memory. It’s similar to the microcontroller used by the Teensy 3.0 platform. The project involves a lot of dynamically allocated memory because it deals with a lot of files inside a file system.
I ran into one of those “sometimes it happens, sometimes it doesn’t happen” bugs that causes a hard fault. Tracing the source of the hard fault lead to a few ordinary SRAM storage instructions, and apparently it happened half way through processing the list of files. This made me suspect that the memory was allocated incorrectly, and I checked all the things I should check(the address of the allocation, how much memory I should have, the status of my stack, the linker script, etc).
Why did you do this?
I like playing shooter games on PC but my laptop is too weak to play them. Game consoles do not support USB keyboards and USB mouse, they only support gamepads. Gamepad controls are not suitable for shooter games, using a keyboard and mouse is much more comfortable for gameplay.
How does it work?
I designed a circuit that features a microcontroller and USB hub. The keyboard and mouse plugs into the USB hub, and then the microcontroller takes the data from the keyboard and mouse, translates them to the data format used by the PlayStation 4. It does the translation in a way as though the mouse was the right thumbstick, and the keys are mapped to buttons (the WASD keys are mapped to the left thumbstick).
If you want to buy one from me, you can’t, I don’t want to sell anything. If you want to buy something similar from somebody else, try the XIM4 (my top choice), CronusMAX, Venom X, etc. (if there’s another product you would like to see on this list, give me one to try out first, and I’ll add it if it works)
Latest News – July 20 2014
I wanted to share this story because I am very happy that I finally managed to get this far! Anybody who is attempting this and thought it was impossible to do can now breath a sigh of relief because it definitely can be done.
I have already accomplished a similar project that worked with a PS3 (UsbXlater), something that connected to the PS3 via USB that translated keyboard and mouse data format to gamepad data format.
Once the PS4 launched, I reversed engineered the USB protocol used by the DualShock, and then attempted the same technique. But… Continue reading
Since the RN42HCI does not support SSP (see previous weekly report post), I’ve switched to using a USB Bluetooth dongle to perform the spoof. This will allow me to get a huge data rate improvement, but at the cost of an USB port. I’ve made massive improvements to the USB host code, and my Total Phase Beagle USB 12 Analyzer really proved itself by telling me exactly how many tokens were sent and how many NAKs were received, which allowed me Continue reading
I am playing around with BTstack (an open source Bluetooth stack) as a part of my on-going efforts to spoof a DualShock 4. After a bit of coding, I got it compiled into the UsbXlater firmware and now I am testing it.
One huge problem I ran into is that the RN42HCI I purchased from Microchip does not seem to support SSP (simple secure pairing). The Microchip website clearly states that the RN-42 is a Continue reading
Spoke too soon about the DualShock 4’s Bluetooth security, although the link level authentication is figured out, it seems like Sony employed a challenge and response authentication mechanism over the HID channel itself. It was hard to spot because it occurs periodically at a slow rate, and it seems to tolerate up to 16 failed attempts before the PlayStation stops responding to an unauthenticated DualShock. 16 failed attempts is 8 minutes, and when I am doing reverse engineering, I only capture a few seconds worth of data. Matlo from GIMX pointed this out to me. Thanks!
This is bad news, the challenge key is huge, cracking it is out of the question. Continue reading
Things are going slow on UsbXlater but I am making progress. I’ve written some utilities to store persistent data in flash, with wear leveling! I figured out how to get the hardware CRC peripheral working inside the STM32F4 in a way that will allow it to spoof the CRC used inside a DualShock. I have started writing a minimal Bluetooth implementation for UsbXlater, but this is a huge undertaking and will take up a lot of time.
I got as far as enumerating a USB Bluetooth dongle, and then sending it a reset command and a read BD_ADDR command. I can get the command complete event back, and Continue reading
I haven’t worked on the firmware for the UsbXlater for a while. This is because I really want it to work on the PlayStation 4 by spoofing the DualShock 4, but after some heavy investigation. It seems like this is impossible (in the sense of spoofing).
On the DualShock 4 circuitry, I have recently found the UART (aka serial port) pins for the Bluetooth module’s HCI (host controller interface). I used my logic analyzer to capture the data from the HCI. The results are posted on my wiki page about the DualShock 4, along with the pcap file with the entire capture.
The PlayStation 4 does not seem to accept input through USB. I did get UsbXlater entirely working and replicating the behaviour of a real DualShock 4, but the PlayStation does not respond. The Bluetooth connection is always active during this time.
Over Bluetooth, it seems that the L2CAP packets that are sent containing the report contains 4 bytes at the end that appears to be random. This could mean it’s a checksum or a hash. Update: it’s a CRC32, with a standard initial value. It’s easy to generate and I’ve already tested it on my sample capture data, so that’s good news. Credit goes to Matlo from GIMX
I do have a new version of the UsbXlater hardware that I can get assembled next week. It will emulate button presses on the DualShock 4 directly using electrical signals connected to the buttons themselves, instead of digitally through spoofing data streams.
I am aware that CronusMax has a “proof of concept” video of his hardware working on the PS4, but that video is a fake, what he did is program it to act as a HID keyboard, which only works in the menus. This is why the video does not show gameplay and why he does not plain outright say that it will be supported. Everybody who is making a device similar to XIM or Cronus or Eagle Eye Converter or UsbXlater is facing the exact same difficulties I am facing. I am disappointed in Cronus because the video’s purposes is probably to drive up pre-orders for people who are hoping for PlayStation 4 support which might never come.
I have many things connected to my single computer monitor via HDMI. I use a HDMI switch so I don’t have to unplug and replug cables all the time. But my cheap $6 HDMI switch is an unpowered passive switch, so it has problems working when the video source does not provide enough power to the switch.
For example, when my Mac Mini is plugged in, the 5V pin only supplies about 3 volts. Inside of the switch is a set of diodes and a AMS1117 voltage regulator that is supposed to output 3.3V using 5V, but instead it is only outputting about 2V. This made the LEDs in the switch flicker and blink (which seemed like a symptom of a bad power supply) and switch refused to function (no video output). My solution was to add a USB micro connector so I can add an external 5V power supply.
After adding the power supply, the switch is able to function properly with a steady supply of power.