pyroelectro.com just started an online course, An Introduction To FPGA And CPLD, through uReddit.com.
This course is meant to create a pathway into learning about FPGA and CPLD electronics, for people who are scared of the code, tools and general trickery that usually comes with it. A hands-on approach is taken in this course through a combination of lecture and experimentation to teach you about the different features of both the development tools and languages used in the world of FPGA. Additionally, visuals are used throughout lectures like step-by-step schematic building and line-by-line code explanations so that everything gets explained.
An Introduction To FPGA And CPLD - [Link]
This project is a message recording board capable of recording 10 to 20 secs depending on audio quality.
This project has been designed around Winbonds ISD1616 IC (SMD) IC, which is fully integrated, single-chip, single message voice record and playback device ideally suited to a variety of electronics systems, Message duration is user selectable in ranges from 10 to 20 Seconds depending on the sampling rates from 4 KHz to 12 KHz adjustable via preset, giving the users greater flexibility in duration versus recording quality.
20 Seconds Voice Record – Playback board - [Link]
by Deivaraja Ramasamy @ www.edn.com:
This Design Idea is able to turn off inductive loads at a very fast rate. When connected to a load (here 15mH + 10Ω), the modified freewheeling path in the clamping circuit based around M2 reduces the turn off time to 450µs. A simple freewheeling diode in place of the clamping circuit takes about 4ms to turn off the load.
Low-side switch with fast turn-off for inductive loads - [Link]
Raspberry Pi PiTFT Weather Station:
More tinkering with the wonderful Adafruit 2.8″ Touchscreen TFT module (PiTFT) for the Raspberry Pi. This time a weather station drawing data from weather.com.
Luckily there’s a wonderful python module to extract data from three popular weather services; python-weather-api supports NOAA, Yahoo! Weather and weather.com. This makes life so much easier.
Download the module and install in the usual way; there are instructions in their wiki.
A simple way to display the raw data in a more readable form is to use Pretty Print (pprint) which is installed by default on Respbian. Just change the code in the call to weather.com in the script below to your town which can be found in the URL if you use the weather.com web page….
PiTFT Weather Station - [Link]
by beardedinventor @ instructables.com:
The ISS Overhead is an ambient display that glows whenever the International Space Station is flying overhead.
It is designed to act as an occasional reminder that there are people living and working in space!
This project should take you somewhere between 2 hours to an afternoon to complete. It assumes you know how to solder, and are somewhat familiar with Electric Imp. If you haven’t worked with Electric Imp before, I recommend you get a basic familiarity by working through Electric Imp’s Getting Started Guide before completing this project.
ISS Overhead - [Link]
by brmarcum @ instructables.com:
I got the idea for this circuit from one of my professors at Washington State University. However, the frequencies used in that project would not have allowed for passing higher frequency audio, e.g. 2kHz+. So I built this by modifying the carrier and signal frequencies, using only the Digilent Analog Discovery and the Analog Parts Kit. It should be noted that this circuit is primarily for educational purposes. Also note that there is no radio transmission here either. FM doesn’t necessarily mean radio waves have to involved.
Throughout this Instructable I will be going through some of the functions and features of the Analog Discovery, but it will not be an exhaustive tutorial.
FM Modulation/de-modulation Circuit - [Link]
TMP75B 1.8-V Digital Temperature Sensor with Two-Wire Interface and Alert. by ti.com:
The TMP75B is an integrated digital temperature sensor with a 12-bit analog-to-digital converter (ADC) that can operate at a 1.8-V supply, and is pin and register compatible with the industry-standard LM75 and TMP75. This device is available in an SOIC-8 package and requires no external components to sense the temperature. The TMP75B is capable of reading temperatures with a resolution of 0.0625°C and is specified over a temperature range of –55°C to +125°C.
The TMP75B features SMBus and two-wire interface compatibility, and allows up to eight devices on the same bus with the SMBus overtemperature alert function. The programmable temperature limits and the ALERT pin allow the sensor to operate as a stand-alone thermostat, or an overtemperature alarm for power throttling or system shutdown.
TMP75B – 1.8V Capable Digital Temperature Sensor - [Link]
Modified connector Euroclamp SHM-F is simply more robust. Thanks to this change, it provides a higher reliability and more space for labeling of signals.
Usually, a miniaturization is a trend almost everywhere where we look. However it´s suitable to miniaturize some things/ components only until some level. This trend is very obvious for example in mobile phones, when many of us disappointed by a „micro-miniature“ keyboard rather bought something bigger. Also nowadays smartphones with a touch display are considerably big, as a size of display brings advantages in this case.
Similar situation is also at new cable connectors (terminal blocks) Euroclamp SHM-F. It is an innovated version of the SHM series. Both are screwless, intended for connection with SV or PV series connectors, which we introduced to you in our article -„Do you already have solved a connection to a PCB?“.
Comparison of both versions is best illustrated on the attached pictures – the original version is on the left side and on the right side is the new version. The main fifference is in the thickness of the connector body, which provides bigger robustness ad a sufficient space for signal marking. Also a positon of a release knob of a screwless clamp is “on the opposite side” in comparison to original version, what should provide a more convenient position of wires to a PCB.
Terminal blocks are declared for 160V/8A and a max. wire cross-section is 1.5 mm2. Screwless construction enables a fast connection and eventua exchange of conductors. New version SHM-F replaces type SHM (only available till stock sell-out).
Is a more robust connector better? - [Link]
Saelig Company Inc. (www.saelig.com) has announced the availability of MSO functionality to their range of Rigol DS2000A and DS1000Z scopes. The mixed-signal extension provides digital signal debug capabilities to the user, allowing simultaneous viewing of analog and digital signals for comprehensive signal analysis. Both models leverage Rigol’s Ultravision technology from the DS6000 series, offering superior performance and functionality in this class.
Designed to reduce test time in research, development and failure analysis applications, the MSO2000A and MSO1000Z series digital oscilloscopes facilitate detecting signal and device characteristics with comprehensive trigger functions, hardware-based real time waveform records, replay, search and analysis functions. The multi-lingual user interface allows easy configuration of the oscilloscopes in the local language.
Saelig – MSO functionality to Rigol DS2000A and DS1000Z scopes - [Link]
This project is a solution to power up most of devices or projects requiring dual (+/-) adjustable power supply. The circuit is based on LM317 positive and LM337 negative voltage regulators. LM317 series of adjustable 3 terminal regulator is capable of supplying in excess of 1.5A over a 1.2V to 30V DC output range, due to TO3 package of IC and large heat sink the power supply can handle maximum load current.
Dual Adjustable Power Supply - [Link]