Dear Circuit Cellar readers, As the COVID-19 pandemic continues to escalate impacting our communities on every level, we’re committed to doing our part. Our editorial and administrative staff all work remotely and will continue to fulfill their roles in putting...

AUVSI XPONENTIAL 2020 is the global stage for everything unmanned—from state-of-the-art propulsion technology, sensors, energy storage and UAS mitigation solutions to what’s coming over the horizon in AI, 5G, edge computing and more. Enter to win a full conference pass...

Motorola Flash Innovation 2003 – Design Contest Grand Prize Richard DreherU.S Abstract: Have you ever wondered what the birds, deer, or bears were doing in your backyard when you weren’t around? With the Remote Observation Station, you can watch wildlife...

Motorola Flash Innovation 2003 – Design Contest Grand Prize Richard DreherU.S Abstract: Have you ever wondered what the birds, deer, or bears were doing in your backyard when you weren’t around? With the Remote Observation Station, you can watch wildlife...

Motorola Flash Innovation 2003 – Design Contest Distinctive Merit Hock Wei SoonSingapore Abstract: The proximity sensor, which was built using ultrasonic technology and the 68HC908QT, helps the visually handicapped detect obstacles. The small sensor requires a 9-V battery. It can...

Motorola Flash Innovation 2003 – Design Contest Distinctive Merit Robert SchmidingerU.S.A. Abstract: The standard mechanical thermostats used in most RV refrigerators aren’t reliable. You have to set the thermostat to an arbitrary temperature and hope the food won’t go bad....

Motorola Flash Innovation 2003 – Design Contest Distinctive Merit Seenath  Punnakkal  & Sameer CholayilU.S.A. Abstract: The Tlogger is a temperature logger with interface to a Handspring Visor PDA. It uses a four-channel DAQ platform based on an MC68HC908QT4. Supporting Files

Motorola Flash Innovation 2003 – Design Contest Distinctive Merit Seenath  Punnakkal  & Sameer CholayilU.S.A. Abstract: The Micro Mini DAQ is a low-cost, low-power, multichannel data acquisition, storage, retrieval, and analysis device with an RS-232 interface. The system can be used for monitoring temperature,...

Motorola Flash Innovation 2003 – Design Contest Distinctive Merit Seenath  Punnakkal  & Sameer CholayilU.S.A. Abstract: The Touchscreen Controller converts user touch inputs to RS-232 data and sends it to your system. Thus, you can reduce development time as well as system and...

Motorola Flash Innovation 2003 – Design Contest Distinctive Excellence Indranil MajumdarIndia Abstract: The stand-alone Automobile Cruise Control is a microwave radar-guided, 68HC908QT4-based cruise control system for all types of vehicles. Using the Doppler effect, the system detects stationary and moving...

Motorola Flash Innovation 2003 – Design Contest Distinctive Excellence Ganesh Raaja MaharajanIndia Abstract: The Blood Pressure Monitor measures the oscillations in pressure in the cuff. A sensor translates the pressure to capacitance, which is then measured by a 68HC908QT4-based circuit....

Motorola Flash Innovation 2003 – Design Contest Distinctive Excellence Sunil JhaIndia Abstract: For use in offices, the iBPIS stores personnel information on the Maxim iButton; the data then can be displayed on a PC or hand-held device through an IR...

Motorola Flash Innovation 2003 – Design Contest Distinctive Excellence Kamal GendiAustralia Abstract: The Mini Node is a creative solution to the horizontal switch plates now popular in Australia. To continue using an HCS II and X10 system for home control,...

Motorola Flash Innovation 2003 – Design Contest Distinctive Excellence Steven Wong Kai JuanSingapore Abstract: The 68HC908QT4 is the core processor of the Low-Power Optical Smoke Detector. Using an infrared LED and receivers, the unit detects the presence of smoke particles...

Coming to your inbox on Tuesday: Circuit Cellar’s Analog & Power newsletter. This newsletter content zeros in on the latest developments in analog and power technologies including ADCs, DACs, DC-DC converters, AC-DC converters, power supplies, op amps, batteries and more....

Compliance for Care Over the past year, there’s been an increasing trend toward new products that have some sort of application or industry focus. That means supplies that include either certifications, special performance specs or tailored packaging intended for a...

Side-channel power analysis is a method of breaking security on embedded systems, and something Colin has covered extensively in his column. This time Colin shows how you can prove some of the fundamental assumptions that underpin side-channel power analysis. He...

Transmission Lines Part 1 of this article series on the world of real schematics ended with a look at wiring. Picking up where that left off, this article looks at real schematics from a transmission line perspective. George shows how...

Bluetooth-Based Design Unhealthy air in indoor environments has been linked to diseases such as asthma, allergies, lung infections and more. That’s driven the demand for sophisticated indoor air quality (IAQ) measurement systems, but many have serious limitations. In this project...

VersaLogic has expanded its line of industrial temperature, rugged Mini PCIe expansion products with the new “E6” module. The new Gigabit Ethernet expansion board offers optional POE+ support. It provides an easy “all-in-one”, economical way to add a Gbit Ethernet...

A Means of Measuring Jeff says he likes being able to measure things—for example, measuring load current so he can predict how long a battery will last. With that in mind, he recently found a high-side current sensing device, Microchip’s...

From IC to Instrument Brian discovered an Analog Devices chip that enables you to perform impedance spectroscopy—in other words, it can measure impedance over a range of frequencies. In this article, he explores the technology, circuit design and software that...

Passives and Parasitics You already know that each issue of Circuit Cellar has several circuit schematics complete with lots of resistors, capacitors, inductors and wiring. But those passive components don’t behave as expected under all circumstances. In this article, George...

Atmosphere IoT has announced it has become a member of The Things Network (TTN) partner program and Marketplace. Atmosphere’s cloud-based software platform for rapid development and management of IoT solutions can utilize LoRaWAN for embedded design and cloud connectivity across...