Simple household status system


[BrianH] decided that he no longer wanted to venture outside on cold or rainy days just to check if the mail had come, so he built himself a notification system that would alert him if the postman had stopped by. Additionally, he admits to being forgetful on occasion and wanted a way to monitor whether or not he forgot to close the garage door. His Instructable details how he accomplished both of these tasks with the household monitor he built around an ATmega168. His project uses a mailbox mounted photoresistor to determine when the mailbox has been opened, and a reed switch that is triggered when the garage door has been opened. If either of these things occur, a beep is emitted from his notifier, and the appropriate status LED is lit. Simply monitoring whether the garage door has been opened is not all that helpful, so he programmed his notifier to beep persistently at 10-minute intervals if the garage has been left open for more than an hour.

His hack is pretty useful, but he does mention that there is an inordinate amount of wiring that needs to be laid, citing his driveway repaving as a great opportunity to do so.

Making Nixie tubes at home

[Aleksander Zawada] makes vacuum tubes in his home. One of the most challenging builds he has taken on is to produce a working Nixie tube. He describes the process in a PDF, covering his success and failure. It seems the hardest part is to get the tube filled with the proper gas, at the proper pressure, and firmly seal it. In the end he managed to make a tube with three digits (0, 1, and 2) that worked for about 700 hours before burning out.

[Aleksander] joins [Jeri Ellsworth] on the short list of hackers who can pull off extreme industrial manufacturing at home. Kudos.

[Thanks Duncan]

Jeri makes integrated circuits

[Jeri Ellsworth] made this silicon inverter at home, by hand. It took her two years to get the process figured out and achieve something we didn’t think was possible. The complexity of manufacture, and the wide range of tools and materials needed seem insurmountable but she did it anyway. Her home chip fab Flickr set is well commented and details her work area and part of the processing. If you’re hurting for more check out her 40 minute Metalab talk which we’ve embedded after the break.

If her name sounds familiar but you just can’t place it you may know her from The Fatman and Circuit Girl. We’ve also featured some of her hacks, such as her Pinball challenge against [Ben Heckendorn], and her giant Etch-a-Sketch.

Continue reading “Jeri makes integrated circuits”

Home injection molding


[Kenneth Maxon] is a wizard who only does things one way, beautifully. While out of the average hacker’s production capabilities, his injection molding machine is amazing to behold. The machine has all features a commercial model would. It heats and cools the mold, produces over a ton of pressure to inject plastic with, and ejects parts automatically to name a few.

WAP controlled home automation


[Josh] sent in a home automation project he did a little while ago. It has a total of eight switched outlets. The main focus of the project was WAP access for remote control from any cellphone. The control box is based on a design by [Ashley Roll] for controlling eight servos using a PIC microcontroller. A listener app written in Java monitors the control web page and sends signals to the board via serial port. He used opto-isolated 240V solid state relays for each of the outlets. All the pieces are available on the site and he might even do a custom control board design if there is enough interest.

PS3 Home hacking


Last week Sony launched the public beta of Home, their virtual world for the PlayStation 3. It wasn’t met with much fanfare and has proven to be quite buggy. Many were less than charmed by scarcity being ported to the virtual world. Others took it upon themselves to hack the service. Connections between the user’s home console and Sony’s server are unencrypted. You can sniff the requests and responses off the wire and modify them live. It seems you need the console to establish the initial connection, but after that you’re free to use builtin tools like Download.jsp, UploadFileServlet, and Delete.jsp to modify any file on the host server. You can also set up a proxy server to modify content, but that will only affect what your console sees.

[photo: nic0]

[via Joystiq]