Evaluation board with low cost ESP8266 WiFi module
The ESP8266 is a chip with WiFi at low cost. Olimex has made a module with the ESP8266 including antenna and 2MB flash where all connections of the chip are exposed. As a result, the use of the ESP8266 for your loT application is very easy. To evaluate the possibilities of the ESP8266 module a board has been developed with a relay (250Vac/10A). Furthermore the board has a pushbutton, a 16-pin header I/O connector and UEXT. For UEXT there are more than 40 different expansion modules available. The ESP8266 has a large community, which made an Arduino IDE plug-in available.
This Ethernet I/O controller has 4 solid state relays and 4 digital in-/outputs. The big advantage of solid state relay is that switching doesn't cause any high frequent interference. Another advantage is the much longer lifetime because a solid state relay doesn't have moving parts. For example to let lights flash a solid state relay is the best solution. The relays on the ETH044 controller are suitable for 230V/5A. Every output works with phase-control which allows lights to be dimmed. The ETH044 has an embedded webpage for the control. Android and iPhone apps can be downloaded for free.
The DSO Nano and DSO Quad are two popular handheld oscilloscopes from Seeed Studio. The latest model has a touch screen. It is a capacitive screen, so by moving 2 fingers outwards you can enlarge the image. The DSO Touch has 2 channels with a bandwidth of 1MHz and a sampling speed of 10MSa/s. The memory is 8K and waveforms can be stored on a internal virtual USB disk of 8M. The instrument also has a signal generator and a rechargeable battery. The DSO Touch has a thickness of just 10 mm and has an aluminum enclosure.
Play high quality audio on the Raspberry Pi with the RaspyPlay4
The Raspberry Pi is popular as multimedia centre. But the poor sound quality is a major concern for Hifi lovers. Not anymore. With the RaspyPlay 4 you can play high quality audio with your Raspberry. This add-on board uses PCM5122 DAC to play your favourite music with excellent dynamic performance. RaspyPlay4 supports FLAC, ALAC, MP3 and WMA. It is compatible with various software, where RuneAudio is recommended. The board is suitable for Raspberry Pi B+ and Raspberry Pi 2.