Browsed by
Category: Electronics Projects

My Electronics Projects

D-Link DWL-120 Hacking/Probing

D-Link DWL-120 Hacking/Probing

I found 3 or 4 of these at a garage sale a few years ago for a few bucks, and I am (surprisingly) just cracking them open now.

On the front, it is marked as D-Link DWL-120 11Mbps Wireless USB Adapter, on the back is FCC ID# MXF-WL280, H/W: B2, F/W: 2.25

On the bottom of the PCB, we have the following chips:

  • Atmel AT76C503AWireless LAN MAC Unit with ARM7TDMI RISC Processor
  • Atmel AT25040N4K (512 x 8) SPI Serial EEPROM
  • tmTECH T14L1024N128 x 9 High-Speed CMOS Static RAM
  • Intersil HFA3861BINDirect Sequence Spread Spectrum Baseband Processor

On the top of the PCB (under the RF shield), we have the following chips:

  • Intersil HFA3683AIN2.4GHz RF/IF Converter and Synthesizer
  • Intersil HFA3783INI/Q Modulator/Demodulator and Synthesizer
  • Intersil HFA3983IV2.4GHz Power Amplifier and Detector

I plugged it into my i386-based laptop (My x64 desktop doesn’t have drivers) and got this dmesg:

[   80.592101] usb 1-2: new full speed USB device using uhci_hcd and address 2
[   80.763204] usb 1-2: configuration #1 chosen from 1 choice
[   81.504200] cfg80211: Using static regulatory domain info
[   81.504209] cfg80211: Regulatory domain: US
[   81.504215] 	(start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[   81.504224] 	(2402000 KHz - 2472000 KHz @ 40000 KHz), (600 mBi, 2700 mBm)
[   81.504233] 	(5170000 KHz - 5190000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[   81.504241] 	(5190000 KHz - 5210000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[   81.504248] 	(5210000 KHz - 5230000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[   81.504256] 	(5230000 KHz - 5330000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[   81.504264] 	(5735000 KHz - 5835000 KHz @ 40000 KHz), (600 mBi, 3000 mBm)
[   81.504290] cfg80211: Calling CRDA for country: US
[   81.654555] cfg80211: Regulatory domain changed to country: US
[   81.654567] 	(start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[   81.654577] 	(2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2700 mBm)
[   81.654585] 	(5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 1700 mBm)
[   81.654593] 	(5250000 KHz - 5330000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   81.654601] 	(5490000 KHz - 5710000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
[   81.654609] 	(5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 3000 mBm)
[   81.912231] Atmel at76x USB Wireless LAN Driver 0.17 loading
[   81.912307] usb 1-2: firmware: requesting atmel_at76c503-i3861.bin
[   81.965349] usb 1-2: using firmware atmel_at76c503-i3861.bin (version 0.90.0-44)
[   81.967174] at76c50x-usb 1-2:1.0: downloading internal firmware
[   84.329808] usb 1-2: reset full speed USB device using uhci_hcd and address 2
[   84.477154] usb 1-2: device firmware changed
[   84.477265] usbcore: registered new interface driver at76c50x-usb
[   84.492786] usb 1-2: USB disconnect, address 2
[   84.604098] usb 1-2: new full speed USB device using uhci_hcd and address 3
[   84.781393] usb 1-2: configuration #1 chosen from 1 choice
[   84.789161] at76c50x-usb 1-2:1.0: downloading external firmware
[   85.032206] phy0: Selected rate control algorithm 'minstrel'
[   85.034924] phy0: USB 1-2:1.0, MAC 00:05:5d:f1:9d:39, firmware 0.90.0-44
[   85.034935] phy0: regulatory domain 0x00: <unknown>
[   85.383777] udev: renamed network interface wlan0 to wlan1
[   89.584738] ADDRCONF(NETDEV_UP): wlan1: link is not ready
Flambeau Brake Control Demo Kit

Flambeau Brake Control Demo Kit

This is a nice item that I found today at Princess Auto… A grey box hiding on the bottom of a grey shelf. The phrase “Demo Kit” caught my eye, and I had to take a peek inside. I was blown away by the beautiful innards, and I just had to have it. It appears to be made by Flambeau (judging from the company name stamped into the front of the case) and the sticker on the lid says it is a “Brake Control Demonstration Kit”

A metal front panel (as seen in the picture) holds a set of terminals, a voltmeter, large Brake and Overload buttons along with various assisting components, such as Output and Stop lights, Battery test button, power switch, 30A removable fuse, and a panel-mount power plug that fits with the included wallwart.

Underneath the panel (picture attached below), reside a 12 Volt, 5 Amp-Hour SLA (Sealed Lead Acid) battery for powering the kit, and some type of coil or capacitor for powering the ‘overload’ button.

Bonus points for the Output and Stop Light lamps: They’re actually incandescent bulbs, not LEDs. (The power light is an LED though, presumably so you can still see that the unit is not DOA even with a near-flat battery.)

Possible uses: (besides requisite attempts to blow various electrical components up with the Overload button)

  • Portable bench power supply (With an adjustable voltage regulator, and maybe an LCD display for kicks?)
  • (Have any suggestions to add? Sound off in the comments!)

(NB, this doesn’t show up on Princess Auto’s website, as it’s probably a new item. It is SKU #8339715 and $19.99 at the time of posting unfortunately, no longer a stocked item.)

BGMicro Shipment

BGMicro Shipment

I just got my shipment of stuff from BGMicro, including a ton of pinheaders!

I ordered:
1x Velleman 4×4 keypad
1x GI AY-3-8910 Sound Chip (and matching IC socket)
2x LEDs with wire and
connectors
1x 2.5″ stero cable end (Digital Rebel XT Trigger?)
1x Graphical KS0108 Display
and Lots of 1×40 and 2×17 Pinheaders 🙂

MiBook Hacking? (Work in Progress)

MiBook Hacking? (Work in Progress)

I recently acquired an old Photoco MiBook. (Photoco LLC had its assets sold off by creditors, and many MiBooks and associated software are being sold on clearance by stores like The Source by Circuit City). Photoco LLC magically reopened under the name of MiBook LLC, and is currently the subject of a nice big lawsuit from Scripps Networks, the owners of Food Network, etc. It’s an interesting read.

MiBook Reader #1

My first of two MiBook readers that I’ll be looking at is this one, which I got from The Source by Circuit City in a “Home Decorating and Gardening” bundle for $29.96, and a set of “books” on 512MB SD
cards for $1.96 each.

The sticker on the back reads “miBook”, along with voltage/amperage requirements, Serial Number (no barcode) and the FCC logo.

  • Screen: 7″ Color TFT: Unknown Manufactuer M1P82BNB03170  “TS0700AAAD01” on LCD glass, “81P81N27 8C021” in small
  • CPU: Amlogic AML6210A (128-Pin QFP)
  • Memory: 64MB SDRAM: EtronTech EM638165TS-6G (54-Pin SSOP)
  • Boot Flash: 16Mbit Flash: Spansion S29AL016D70TF102 (48-Pin TSOP)
  • Real-Time Clock: Intersil ISL1208 (ISL1208IB8Z, marked “1208 ZI”) (8-Pin SOIC)
  • DAC (96kHz, Stereo): Cirrus Logic 4334-KSZ (8-Pin SOIC) (Probably)
  • Op-Amp: JRC 3414A (8-Pin SSOP)
  • Unknown/Audio Amp?: STH 63BJRC STH49S6H0 ??? (20-Pin QFN)
  • Unknown/Power-Related: 8A068 3213D (8-Pin SSOP)

MiBook Reader #2

I also have another MiBook reader which I got as a prize from DigiKey. It came as just the MiBook/charger/USB/Remote combination, and didn’t have any SD-card “books” like the Source’s bundle. This one is a little newer, and is better-built overall: the stand snaps into place, the charging LED is more visible, the buttons are better quality inside, the plastic pieces are formed better, the exterior screws are larger and much easier to remove, etc.

The sticker on the back reads “PHOTOCO miBook”, along with voltage/amperage, Serial Number with Barcode and the FCC logo. (It is interesting to note that this one is labelled specifically a PHOTOCO product. Old stock that they brought over from Photoco LLC to Mibook LLC? Check out the link at the beginning of the article for information on Photoco/Mibook/etc.)

  • Screen: 7″ Color TFT: Unknown Manufactuer HLLB-0302A1 HL080414D010075
  • CPU: Amlogic AML6210A (128-Pin QFP)
  • Memory: 64MB SDRAM: EtronTech EM638165TS-6G (54-Pin SSOP)
  • Boot Flash: 16Mbit Flash: MXIC 29LV160CBTC (48-Pin TSOP)
  • Real-Time Clock: S35390A (8-Pin SOIC)
  • Unknown: “C” or “e” C04558 (8-Pin SOIC)
  • Audio Amplifier (300mW Stereo): National LM4853L (20-Pin Mini-SOIC)
  • DAC (96kHz, Stereo): Cirrus Logic 4334-KSZ (8-Pin SOIC) (Probably)
  • Power Conversion/Adjustable VREG: STMicro LD1117A (3-Pin package)
  • Power Conversion/Switching PS Converter: Aimtron AT1380P (8-Pin TSOP?)

See also

Wii Off-brand Nunchuck Internals

Wii Off-brand Nunchuck Internals

Nyko “Kämä” Wired Remote:
MCU: Atmel ATMega 48 TQFP (The PCB also has pads for MLF package, based on availability?)
Accelerometer: Freescale A7260
EEPROM: Macronix (MXIC) MX25L4005 (4 Mbit)

Definitely a good nunchuck for hacking; it’s well-built, and the analog stick appears to be mostly metal-based, instead of plastic like others.

I wonder if the ATMega is read-locked? If so, I wonder how hard it would be to rewrite/repurpose it…

Biogenik OG1-CHUK:
The only thing of interest was a single epoxy blob on the PCB.

Madcatz Z-CHUK Wireless: (FCCID: P25S1MC5746U1709C, 2.405-2.475Ghz)
MCU: Epoxy blob of unknown origin
Accelerometer: Unknown. “033 A841 013”?
EEPROM: STMicroelectronics M24C02 (2 Kbit)

Wireless is nice, and might make for some interesting projects, and at $10/piece from XSCargo, it’s definitely an affordable way to get into wireless (and accelerometers, etc). The internals of this remote look almost identical to the actual Wii Nunchuck, with the exception of the battery and transmitter.

“Nintendo” and “Wii” are registered trademarks of Nintendo of America Inc. This site is not affiliated with, or endorsed by, Nintendo, Madcatz or Nyko.

QuahogCon 2010: My Freeduino (From AlphaOne)

QuahogCon 2010: My Freeduino (From AlphaOne)

This is my new Freeduino, which I purchased as a kit from the fine folks at the AlphaOne Hackerspace table at QuahogCon 2010.

I assembled the kit together at the Hardware Hacking Lounge with some super-sweet soldering irons, then spent the next hour and a half trying to figure out why it wouldn’t work. Turns out that it needed a jumper on the USB/External power selector. Thanks to Mr. Jimmie Rodgers for the eagle-eye lack-of-jumper spotting.

I already have an Arduino (the original); however, it doesn’t have a pin for the reset line or 3.3V line on the headers, so I guess it will just be relegated to different tasks.

I had planned to submit an entry into the Alpha One Labs Hackerspace’s Arduino Hacking Contest, though I ended up spending every waking moment trying to hack the Humans vs Zombies game. Apparently, I was not the only one with not enough time; there were unfortunately no entries into the contest 🙁 I ended up receiving honorable mention (consisting of a T-shirt) for constructing my Freeduino.

Hopefully, there will be an Arduino Hacking contest next year… Start building those Arduino projects!

QuahogCon 2010 Badge Hardware Hacking – The Beginning

QuahogCon 2010 Badge Hardware Hacking – The Beginning

What I Did:

I took a Cellboost IPR3 that was otherwise destined for a dull life of providing power to an original iPod Shuffle, and converted the cable normally used for charging it into a USB-A-to-2-pin cable using the cable from an old computer case’s hard drive activity light. (Using the cable is a bonus for me, since this cable has been kicking around the junkbox for ages.)

What I Wanted to Do:

I’ll be the first to admit this isn’t so much a ‘hack’ since it’s what the badge was designed to do. I had planned to populate the two 2×16 rows of headers with female headers, then put a piece of perfboard on top either with male headers pointed down or with female headers with double-length legs. The plan was to have something akin to an Arduino shield: Removable, changeable, and replaceable. What you see here is what I got done during the ‘con. I’ll post updates as I progress in badge-hacking now that the ‘con’s over.

About the Cellboost IPR3 Hardware

The Cellboost device contains 1 Li-Ion battery, 5V charging circuitry, and 5V output circuitry; the charging circuitry is the best part, since Li-Ions are a pain to charge otherwise. It includes a USB extension cable (USB-A Male to USB-A Female) that supplies power only (no wires for data) to charge the Cellboost unit with. The unit itself has a USB-A Male (for charging the Li-Ion) and a USB-A Female receptacle on it (for the iPod to plug into).

I acquired a number of these Cellboost devices from Princess Auto; at their last big clearance sale, they were on for (IIRC) $0.79 each. As an aside, I had someone at Quahogcon ask me if I had been to the MIT Garage Sale. Apparently they were sold there as well. Regardless, I still have 4 or 5 in their original packaging to be used to power other projects.

QuahogCon 2010 Loot

QuahogCon 2010 Loot

Here’s what I gained (physically) from QuahogCon 2010 (in no particular order):

(And yes, I would have preferred to photograph against a plain white background, but hey.)

Sparkfun.com Stuff: Arduino Shield, Breadboarding Supplies, etc

Sparkfun.com Stuff: Arduino Shield, Breadboarding Supplies, etc

My latest Sparkfun.com order.

For PIC programming:
BOB-00193 (1): Adapter board for Microchip ICD and ICD2

For (hopefully) adding some IR functionality to my QuahogCon badge:
COM-09349 (4): Infrared LED – 950nm

For parts:
DEV-00348 (2): Olimex Carrier Board for OKI ML67Q5003

For prototyping on the Arduino (and otherwise generic prototyping):
DEV-07914 (1): Arduino ProtoShield Kit
PRT-07915 (1): Breadboard Mini Self-Adhesive (For Protoshield Kit)
PRT-09567 (1) : Breadboard Clear Self-Adhesive (For other breadboarding)
PRT-00124 (1): Jumper Wire Kit
PRT-08430 (1): Jumper Wires Premium 6″ F/F Pack of 10
PRT-08431 (1): Jumper Wires Premium 6″ M/M Pack of 10
PRT-09140 (1): Jumper Wires Premium 6″ M/F Pack of 10

QuahogCon Badge Details Released

QuahogCon Badge Details Released

In the fine tradition of hacker con badges, QuahogCon presents its inaugural badge, based on the Freescale MC13224v.

More info and badge specs can be found at mc1322x.devl.org: MC13224 Hardware, and more contest-related info can be found at QuahogCon: Contests.
.
MC1322x-related Open Source tools and guides are available at mc1322x.devl.org.

I’ll be adding more badge-hacking-related stuff before/during/after QuahogCon, once I get to play around with my badge.