Mobile generator on formic acid

Team FAST, a student team from the TU Eindhoven, has developed a generator for construction sites that produces electricity from sustainably produced formic acid. Using this generator, a pilot project will be initiated for the construction of the N211, in cooperation with construction company BAM Infra and the Province of South-Holland...

Sometimes you get really odd projects touted on crowd-funding sites. One such novel ‘device’ that appeared recently on Indiegogo promises free electrical power, I think I’ve seen one of these before, if I remember correctly it was titled something like ‘So-Called Alternator Magic’ (SCAM) device...

The heart of our ultrasonic generator is a ATtiny25-20. To avoid the animals from becoming habituated, it generates a burst of roughly 1 second every 10 seconds. Since we humans cannot hear whether the circuit is active, an LED makes the operation of the circuit visible. The microcontroller itself is nowhere near capable of delivering enough current to drive a loudspeaker directly. So we added a BS170 MOSFET as a driver stage for the MPT-001 tweeter from Monacor.

The first time I tried a software random number generator (RNG) and learned that these numbers, being calculated from previous values, are actually not so arbitrary at all, I started thinking about generating truly random numbers with an electronic device. Later, when I learned the basics of cryptography, I discovered more reasons for a good Random Number Generator (RNG) to be a useful thing to have. Secure data encryption, for instance, is almost impossible without one. Gaming and gambling applications also require top-class RNGs.

Power supply is often one of the biggest hurdles for IoT devices. Researchers at North Carolina State University (USA) have developed a thermoelectric generator that can provide enough power for wearable electronic devices.

Red Pitaya is a powerful instrumentation and prototyping module used by numerous electronics professionals and hobbyists as a general-purpose oscilloscope, signal generator or signal analyzer. It is also suitable for user-developed applications. Red Pitaya is now offering a calibrated version of this versatile module as a limited edition, eliminating the need for calibration by the user.

Using simple everyday materials, you can build a generator that can supply enough power for a small electronic device. This discovery comes from Xiao-Sheng Zhang and a research team at the École Polytechnique Fédérale de Lausanne (EPFL) in Switzerland, in collaboration with scientists at the University of Tokyo.

Introduction: A simple Platino-based Signal Generator is designed for not too demanding (hobbyist) applications. It is usable for applications like signal tracing, clocking of MCU circuits, audio filter & loudspeaker testing, tuning, etc.

Introduction: A simple Platino-based Signal Generator is designed for not too demanding (hobbyist) applications. It is usable for applications like signal tracing, clocking of MCU circuits, audio filter & loudspeaker testing, tuning, etc.

The set frequency of inexpensive frequency or function generators is often indicated by a simple scale on the tuning knob, which is not normally very accurate. It is possible to improve this by adding a counter discriminator circuit consisting of a small number of standard components as shown in the diagram.