Sensor Nodes Based on the Raspberry Pi

Building sensor networks is economical if a microcontroller hosts the sensors. However, sometimes the computational power a microcontroller offers is not adequate. For instance, it may be necessary to convert the data to a different format, print a hard copy of the sensor data, or incorporate the data within an application. What you need is a computer that not only has more processing power, but also allows the use of common applications, affords access to peripherals, and permits the use of scripting Read more [...]

Intelligence in LED Lighting

Apart from illuminating dark spaces there is much more to LED lighting than otherwise thought of. LEDs can be connected in an intelligent network with a low-voltage IP-based infrastructure, and they become a part of a powerful network of systems. Such a system can cooperatively collect, analyze, manage, control, and respond to specific objectives based on real-time sensor feedback. The building lit up by these LEDs now behaves as a smart building, offering better operational performance. It responds Read more [...]

Less Expensive 3D Printing

3-D printing is no longer a new technology. Several design studios use it, along with some home users who make their products using 3-D printers. However, the general opinion is it is expensive, slow, and unable to compete with traditional mass-manufacturing processes. Although considered a revolutionary technology, so far, 3-D printing has remained on the periphery. Now, a Massachusetts company is trying to prove the general opinion wrong. Desktop Metal is coming out with a 3-D metal printing system Read more [...]

Bluetooth 5.0

Custodians of the Bluetooth standard are a flexible lot, considering the enhancements the popular short-range 2.4 GHz wireless technology has been receiving. The Bluetooth SIG or Special Interest Group has allowed it to evolve in ways not envisioned by the inventors. Their foresight will be allowing this technology to expand beyond three billion shipments beginning next year. The latest incarnation of the technology is the Bluetooth 5.0. This indicates the seriousness with which SIG wants to entrench Read more [...]

Choosing a Regulator – Switching or LDO

Unlike AC circuits where a simple transformer can change the incoming voltage to a different level, DC circuits need an active device to change the voltage to the desired level. In general, there are two types of circuits to do this—switching and linear. Switching regulators are highly efficient and work on buck, boost, or buck-boost technology to change the voltage level. On the other hand, linear regulators such as LDOs are ideal for powering very low power devices or applications where the difference Read more [...]

Measuring 16 Temperatures Remotely

In several cases, one cannot access the area where the temperature needs to be monitored. For instance, the temperature inside a kiln may reach a few thousand degrees, which is beyond the tolerance of humans. Environment chambers may need to be completely sealed off when operating, which means monitoring the conditions within has to be remotely accomplished. Simpler cases may also be considered, where the computer logging the temperature is in a central location, whereas the monitored sites are spread Read more [...]

Measuring Air Quality with IoT Sensor

Bosch Sensortec is making an IoT environmental sensor for measuring air quality. The BME680 can measure the indoor air quality, relative humidity, barometric pressure, and ambient air temperature. It has four sensors housed within a single LGA package measuring 3x3x0.95 mm, and both mobile and stationary IoT applications can use the package for use in smart homes, offices, buildings, elder care, sports, and fitness wearables. The BME680 measures the indoor air quality through its internal gas sensor Read more [...]

Voice HAT for Raspberry Pi for Controlling a Motor

If you were one of the unlucky ones to miss out on the issue 57 of the MagPi, then the only option is to buy the Voice HAT from the AIY projects. The issue 57 had offered a free AIY projects Voice Kit, which Google had developed to make a Voice Assistant, and you could control a speaker with the voice HAT that attached on top of a Raspberry Pi Zero (RBPiZ). Other tutorials in the MagPi show how to connect the Voice HAT hardware to simple circuits.  So far, the tutorials have dealt with LED lights Read more [...]

3D NAND Memories Cross 10TB

At the Flash Memory Summit in Toronto, Micron Technology exhibited their NVM Express or NVMe Solid State Drives that use the company’s 3D NAND technology to achieve capacities over 10 TB. According to Dan Florence, Micron built the 9200 series of NVMe SSDs from ground up to overcome the restrictions placed by the legacy hard drives. Dan Florence is the SSD product manager for Micron’s Storage Business Unit. The design of the new storage portfolio addresses the data demands that are presently Read more [...]

Charlieplexing on the Raspberry Pi

If you suddenly find the need to control many LEDs and do not have the requisite electronics to do so, you can turn to your single board computer, the Raspberry Pi (RBPi) and use it to charlieplex the LEDs. Charlieplexing is named after Charlie Allen, the inventor of the technique. Charlieplexing takes advantage of a feature of the GPIO pins of the RBPi, wherein they can change from outputs to inputs even when the RBPi is running a program. Simply setting a GPIO pin to be low does not allow enough Read more [...]