Tag Archives: raspberry pi

A HiFiBerry DAC installation using a linear power supply

Here comes another nice HiFiBerry DAC installation. Jens from Germany doesn’t like switching mode power supplies for audio. Therefore he created a HiFiBerry setup with a huge linear power supply. Note that the power supply needs to provide at least 5V/1A for a stable operation of the Raspberry Pi. Depending on the input voltage this means heat. He uses a large heat sink and a small ventilator to get rid of the heat.

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A HiFiBerry installation with button control and LCD display

RPi HiFiBerry 2014 openPieter Kleinjahn has installed a Raspberry Pi, the HiFiBerry DAC, some buttons and a LCD display in one box.

The buttons can be used to control MPD. Distributions like Volumio and RuneAudio are based on MPD, therefore this could be interesting for many readers. Peter has provided the Python script that controls everything. You can download it here: mydisplay-20140409. Note that we provide this “as is” without any support. However, the code is clean and well-documented. Therefore it should be relatively easy to adapt it to your needs.

Some thoughts about the Raspberry Pi compute module

CM_and_pi-small-500x375 The Raspberry Pi foundation has announced the “Raspberry Pi compute module”. As we are big fans of the Raspberry Pi, this looks like an interesting product to us. However, let’s have a closer look first.

The product is clever for the Raspberry Pi foundation. Many of the Raspberry Pis sold already are not used by private persons, but in industrial applications. The good availability and the low price of the Raspberry Pi made it a nice platform for these many applications. With the new board, the foundation clearly targets this market.

The compute module basically consists of the Broadcom SoC chip and a 4GB flash. The 4GB flash is really nice, because you don’t need an SD card with this module. All other hardware that is included in the Raspberry Pi Model B is missing. The most critical: there is no ethernet controller. Using a standard SO-DIMM module is good for large producers, but for small quantities this increased costs again. Also there is no voltage regulator on the board, which means you need external 3.3V and 1.8V voltage regulators. Therefore solutions based on this board won’t be cheaper, but most likely more expensive than solutions based on the Raspberry Pi.

Some people where already dreaming about clusters of compute nodes for computing applications. I don’t think this is a good idea. If you’re really looking for CPU performance, the Raspberry Pi is not the first choice. There are many other ARM based SoCs available, that provide much better performance and are only a bit more expensive.