Hi,
the best choice to setup a very tiny dhcp server on linux is the busybox udhcpd DHCP implemention.
root@debdev:~# apt-get install udhcpd
Continue reading Linux: Configure a tiny DHCP Server
Category Archives: Electronic
Electronic: Replace a laser pickup of a Sony CD Player
Hi,
a friend of mine has an very oldschool CD Player, a Sony CDP 770 from 1988. With the time, the laser and the lense has degraded and hearing music without any interruption isn’t possible anymore.
I decided to look for a new laser pickup and found a spare part for the original RSS-150A, I shot a new RSS-210A by ebay for about 20€. Let them give it a shot!
Here are the steps to replace the pickup. You only need 2 skrewdrivers. Open the chassis by loosing the 4 skrews in the cover, 2 at each site.
Continue reading Electronic: Replace a laser pickup of a Sony CD Player
Raspberry Pi: eibd with a KNX USB Interface
Hi,
a reader of my post asks me if it possible to connect the eibd bus with a KNX USB Interface instead of the TPUART board. These interfaces are available by several vendors(Siemens, Gira, Merten etc.).
I have no KNX USB Interface for testing and therefore Bastian Herzog did that part and supports me to improve the script. Very special thanks to him. Together we have get this started.
As descripted in the previous post setup your Raspberry Pi with raspbian:
Continue reading Raspberry Pi: eibd with a KNX USB Interface
Raspberry PI: EIB/KNX IP Gateway and Router
Hi,
this Post is a tutorial to build an IP EIB/KNX Gateway based on a Raspberry Pi completely from the scratch. The core components are the eib daemon from the bcusdk in conjunction with the TPUART EIB Bustranceiver module.
The Hardware
3 components are needed:
- A Raspberry PI
- A EIB Buscoupling Unit
- Adapter Board to connecting both
You can use A or the B Model of Raspberry Pi. The eibd daemon has minimal hardware requirements.
There are two possibilities for connecting a computer to the EIB/KNX Bus over a RS232 serial interface. Both are supported by eibd.
- Buscoupler 2 with FT12 protocol
- TPUART module
Continue reading Raspberry PI: EIB/KNX IP Gateway and Router
Raspberry PI: Connecting a HD44780 Display over I2C Bus
Hi everybody,
some application, i.e. XBMC can show informations on a display by using LCDproc as driver.
This post describes a way to connect a HD44780 display to a Raspberry PI by i2c bus.
Let’s start with the physical layer. This is the overview schematic on how to connect the display to a Raspberry PI.
Based on these I developed small board with a 6 Pin header which is Pin compatible to the Raspberry PI. So a simple 6 pole ribbon cable can be used to connect the HD44780 Display to the fruit.
Here is my PCB. First the schematic.
and my board layout. Unfortunately there are a lot HD44780 models available and the location and the direction of the pins are different, so you have to adapt the layout to the specification of your display.
Continue reading Raspberry PI: Connecting a HD44780 Display over I2C Bus