It is a CY8C27443-based Solar Pump Controller that operates a submersible water pump directly from solar panels. It is ideal for remote areas that lack conventional power supplies. The powerful PSoC provides three-phase PWM generation, signal conditioning, temperature monitoring, constant voltage-to-frequency control, and over-current and fault protection.
Published: May 6th, 2008
Traditional bridge circuit solutions measure capacitance by including the measured capacitor in a bridge where the balancing elements are known and accurate. Because alternating current is used, this approach is inapplicable to certain capacitor types (e.g., tantalum and aluminum electrolyte) in which a thin layer of metal oxide serves as the dielectric. These oxides exhibit certain semiconductor properties that naturally affect the accuracy when AC is flowing.
Published: May 6th, 2008
It is a solar-powered data collector that records sunlight exposure. This RCM3400-based device is the perfect tool to have on hand when scouting out sites for solar panel installation.
Published: May 6th, 2008
When designing high-speed applications, working with SMT components and soldering by hand can be tedious. Robert H8-3687-based SMT Reflow Oven Controller transforms a conventional infrared toaster oven into an effective reflow oven that ensures thermal control.
Published: May 6th, 2008
Starting with the digital section. IC1 is the clock generator, which runs at four times the sampling frequency. The frequency is adjustable over a limited range by VR1, the Delay Fine control. This slightly unusual configuration gives an output with an approximately equal mark-space ratio.
Published: May 6th, 2008
The dynamic range of an audio signal is the difference between the quietest discernible part of the signal and the loudest undistorted part of the signal. It is normally expressed in decibels (dB).
Published: May 5th, 2008
Basically, USB-AtmelPrg is an USB-based "universal interface cable" connecting a host computer to the programmable device such as a microcontroller or a CPLD.
Published: May 3rd, 2008
This is a USB (universal serial bus) interface board which can be used to connect 8 (parallel) data lines to the USB. The interface comes with a small internal FIFO (384 byte Tx, 128 bytes Rx) and 4 handshake lines which make it suitable for interfacing microcontroller designs to the USB.
Published: May 3rd, 2008
The Printer Sharer will allow two PCs to share one parallel (Centronics) printer without manual intervention. Users simply print from their software applications as usual, and the printer sharer lets the data through on a first-come first-served basis. The computer that comes second receives a "busy" signal until the first computer has finished. Most software, including Windows 3.1 Print Manager, will happily wait for the printer to become available.
Published: April 25th, 2008
Wireless networking is easy, as long as you have the right tools for the job. Here is how to get on the air with Z-World Wi-Fi application kit, which includes a Linksys Wi-Fi card and RCM3100 module. Go wireless in no time.
Published: April 24th, 2008
Bernard shows us how to use an use an accelerometer as a mouse. This project uses a MEMS X/Y accelerometer, a PIC microcontroller and a old mouse. He also describes a trick for powering the new mouse with the unused RS232 serial control lines.
Published: November 19th, 2007
You can attach an SD camera memory card to any homebrew DIY project that has a few I/O pins, using ordinary connectors you probably have right now
Published: November 19th, 2007
By using a pair of polarizing filters and a property of certain materials called birefringence we can photograph the hidden stresses in hard plastics.
Published: May 1st, 2008
A magnetorheological fluid is a liquid that hardens near a magnet, and becomes liquid again when you remove the magnet. They are simple to make in your kitchen after a trip to a sandbox.
Published: May 1st, 2008
Here is how to make your own jet enigne to power your wacky vehicles
Published: May 1st, 2008
A mini-rocket that uses water and carbon dioxide as "fuel". The principle of the rocket is simple; the Newton third law of motion states "for every action there is an equal opposite reaction". The action is the gas produced by the effervescent when is in contact with water. The gas creates pressure and accumulates until the cap pops out. As the cap have no where to go, the plastic can goes up (the opposite reaction) because the gas pushes it.
Published: May 1st, 2008
Here is an easy-to-build homemade thermometer that can be built in about one hour using materials available at home.
Published: May 1st, 2008
How to make a powerful solar concentrator that can cook four or five hotdogs in minutes. The Solar Hotdog Cooker is made out of a thin (1/8 inch thick) plastic mirror that can be found at plastic shops and glass stores.
Published: July 18th, 2007
