Tag Archives: generator

Scullcom Hobby Electronics #26 – Build a Function Generator Part 2

by Scullcom Hobby Electronics @ youtube.com

This is part 2 of the building a function generator. We cover the output stage and discuss some changes to the original design. Finally, we build the project in to a case and test.
Below are the links to the latest main schematic diagram and a second file for the Display and Arduino schematic.

Scullcom Hobby Electronics #26 – Build a Function Generator Part 2 – [Link]

Tiny and cheap lab generator

IMG_1992

Bob build a tiny and easy to build function generator. He writes:

Function generator is a rely useful tool in the lab, a simple version can be build at home, there’s a lot of examples on the Internet, some are much more complex and powerful, but this one is intended to be really simple and cheap. It can be also built-in in some bigger projects that also requires a generator.

The generator can output (only) square signal with adjusted frequency and pulse width. The amplitude may be also modified by soldering different values on the voltage divider on the output, it’s a bit laborious, but if it will be used in digital or microprocessor projects, then there isn’t really need for amplitude adjustment.

Tiny and cheap lab generator  – [Link]

A Bladeless Wind-Powered Generator

dutchWindmill

by elektor.com:

You don’t need to travel far in the Dutch countryside before you come across a traditional windmill. Now a consortium of Rotterdam-based companies are planning to build a massive wind-powered generator structure in Rotterdam harbor that will generate energy without using rotating blades. The innovative ‘Windwheel’ will work on the EWICON (Electrostatic WInd energy CONverter) principle developed at TU Delft and Wageningen University backed by a government economy/ecology innovation program.

The striking design has no moving parts but will use wind power to move charged particles (water droplets in this case) against the direction of an electric field. Charge will be transferred to a plate and then fed into the grid. Plans for the proposed generator structure are ambitious and indicate that it will contain a 160-room hotel built on seven floors, 72 residential apartments, a restaurant and other visitor attractions including an outer glass and steel ring structure containing viewing gondolas.

A Bladeless Wind-Powered Generator – [Link]

Video generator with PIC.

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by Beke András @ bekeband.hu:

An black and white monitor needs to improve and repair from about 1990-th. The repair of device was not difficult but it caused troubles for the testing and setting of the monitor. We have a pattern TV generator, but this instrument are produce on the composite video signal for monitor. Unfortunately this monitor is demand not compozite signal instead of horizontal sync, vertical sync, and lightning signal. (video signal). Whereas the monitor host machine is not available – in fact I don”t know exactly what kind of equipment, perhaps a kind of mass spectrometer or something -, we need necessary a appropriate video signal source.

Video generator with PIC – [Link]

Two-dimensional piezoelectric material forms basis of world’s thinnest electric generator

mos2-piezoelectric-generator

by Darren Quick @ gizmag.com:

Researchers from Columbia University and the Georgia Institute of Technology are laying claim to having observed piezoelectricity in an atomically thin material for the first time. The effect was demonstrated in the world’s thinnest electric generator made from a two-dimensional molybdenum disulfide (MoS2) material, which had previously been predicted to exhibit such properties.

Two-dimensional piezoelectric material forms basis of world’s thinnest electric generator – [Link]

12F675 pulse generator

12f675pulse

by cuteminds.com:

Everytime we need to test a stepper motor controller we have to connect it to the parallel port of the computer or to a function generator to obtain the necessary pulses the realize the movements of the stepper.

This is a quicker method to check a controller integrity. Simply to make the life easier here is a square wave signals generator. A potentiometer or a trimmer regulates the pulse generation of the 12F675 microchip (a square wave, between 20 hz and 3khz). Ok, there are thousands of different ways to create a pulse generator, but we had a lot of microcontrollers.

12F675 pulse generator – [Link]

AD9833 based USB Function Generator

tuomasnylund.fi writes:

One tool that I’ve been missing at my lab at home is function generator. They tend to be a bit expensive, so I haven’t bought one. I thought this might be a good opportunity to try and make one myself. I found a pretty common DDS (direct digital synthesis) chip, called AD9833. Then just strap a USB-enabled AVR micro there and maybe some analog electronics.

This board doesn’t do any of the special analog magic to allow for variable amplitude or offset for the signal. The output is fixed to 0-4v. I’m planning to make another completely analog board for adjusting amplitude and offset.

AD9833 – based USB Function Generator – [Link]

Universal Digital Arbitrary Waveform Generator

 

AKTAKOM’S AWG-4151is the latest in the series of innovative waveform generators 

Miami Fl., July 27, 2012 – T&M Atlantic., distributer of the test and measurement equipment, today unveiled Aktakom AWG-4151 150 MHz single-channel digital generator.

This generator was designed using the technology of direct digital synthesis (DDS) based on 14-bit DAC and is distinguished by high functionality and specifications. The new model of AKTAKOM AWG-4151 generator has maximum oscillation frequency up to 150 MHz (for a sine wave) at the maximum frequency resolution of 1 Hz. In addition to a sine signal, AWG-4151 can generate such standard signals like square wave, pulse, noise and user signals with a frequency range from 1 µHz to 10 MHz: rising and falling exponentially, Sin (x)/x and DC signal. In addition the new AWG-4151 generator allows users create and save arbitrary shape signals into the internal memory.

AKTAKOM AWG-4151 universal generator can work not only with harmonic signals, but also has modulation opportunities and other special modes including: amplitude modulation (AM), frequency modulation (FM), phase modulation (FM), frequency-shift keying (FSK), and also operation in pulse width modulation (PWM), sweep mode, frequency and pulse bursts.

For the majority of new AKTAKOM generator models it has become traditional to use a color graphic display to display a signal waveform. The same can be seen in AKTAKOM AWG-4151 generator with color (65536 colors), 3.9 inch LCD with TFT matrix and resolution of 480×320 pixels. The use of a color graphic display simplifies users’ operation process making a generator control simple and clear. Also it helps to see a currently specified value not only in digital form but also to understand what it’s responsible for on a displayed signal form.

More info available at www.tmatlantic.com

Universal Digital Arbitrary Waveform Generator – [Link]

Homebrew DCF-77 Signal Generator

www.changpuak.ch writes:

Well, our meetings take place on wednesdays at 10:30 (sharp). A radio controlled clock is used to determine whether you are late (and must bring a cake next time) or not. Unfortunately the identical radio controlled clock in my office always shows a different time :-(

After baking a lot of cakes, I thought about synchronising these disreputable clocks …

Homebrew DCF-77 Signal Generator – [Link]