Mainframe

For the access control system and different private and space related projects sre regularly uses I²C sensors/devices. For testing purposes it helps a lot, if those devices can be connected to a notebook. So far he either used a VGA adapter (VGA cables contain an I²C signal to transport the display’s DDC information. Most of the open source linux graphic card drivers allow users to access the i2c bus on the adapter using standard tools). Unfortunately newer hardware no longer provides VGA…

For our access control system, we needed a motor lock for our main door. After having a look how other hackspaces solved the problem, we decided to get ourself an ABUS CFA1000. It’s quite popular among Hackspaces, Fablabs and Makerspaces for two reasons:

• It’s cheap (< 100€) compared to other solutions, which often cost over 500€
• It does not require door modifications (our main door probably contains asbestos)
• The schematics are available from the Internet

Once we received the piece of…

For our access control system we needed wanted a few multi-colored status LEDs. Nowadays that basically means, that one gets a few ws2812b LEDs, since they are quite cheap and already provide a serial interface. Unfortunately most microcontrollers including the Raspberry Pi have no hardware accelerated interface for their protocol. For our access control system we thus use an ATtiny85 to translate from the ws2812 protocol to a more common serial protocol: I²C.

Below you can see how the ATtiny85…

Der Hackathon co-op3 fand am Wochenende des 05. + 06. November 2016 in den Räumen des Mainframe statt. Das Motto lautete: Dein Projekt für den Kongress - 33C3Es ging dabei um Projekte, die mit auf den 33C3 gebracht werden können.

Nach dem Start um 16 Uhr am Samstag traten die Teilnehmer mit ihren Projektideen an. Wie auch bei dem vorherigen Hackathon co-op2/coop2 wurde mit einem Soft-Opening begonnen. Die Aktivitäten erstreckten sich über die gesamten Räume des Spaces. Nach einer ersten…

While the status-switch is nice, it does not help to actually get into a hackspace. For this you need some keys and with multiple people having access rights having a single key is quite annoying. While there are a few simple solutions they usually lack some desired features. Thus we decided to implement a digital access control system, that can open our doors.

As visible in the Space Map, there are multiple ways to get into our Hackspace. Let’s have a look at the main entrance for…