Project Solutions

Swiss Army knife （4）

Published:2011/8/1 21:21:00 Author:Phyllis

By Jim Spence Memory The memory space of the 8052 uses an architecture that shares parallel areas of memory. By logically combining the OE and PSEN signals to access the RAM it means that the external RAM can be used as program memory. The 8051 architecture is old and we’re sure that separating out the data and program memory seemed like a good idea at the time. This is what is know...   (View)

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Swiss Army knife （3）

Published:2011/8/1 21:15:00 Author:Phyllis

By Jim Spence ...and USB As you can see from the PCB artwork, the USB interface is connected to the MCU section by copper tracks. If you want to fit the USB interface at some distance from the MCU board, the PCB sections have to be separated by cutting or sawing and a small connection cable installed between the respective connectors. Now for some bad news. The FT232BM chip ...   (View)

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Swiss Army knife （2）

Published:2011/8/1 21:13:00 Author:Phyllis

By Jim Spence USB interface The USB interface shown in Figure 2 uses a chip from Future Technology Devices Intl. Ltd. (FTDI) and the circuit follows their data sheet. The FT232BM is designed as a quasi-replacement RS232 interface and when installing the device drivers, it becomes a COM po...   (View)

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Swiss Army knife （1）

Published:2011/8/1 21:03:00 Author:Phyllis

By Jim Spence In a fix? Need to get a microcontroller project off the ground FAST? This article proves that an ultra-versatile microcontroller board can be built and programmed even by relative newcomers. The main circuit is based on the Atmel 89C8252 which has an 8052 architecture. Knife Tiny BASIC, 8051 assembler, RS232 and USB all in one project Included is some v...   (View)

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Gameboy Oscilloscope （3）

Published:2011/8/1 3:00:00 Author:Amy

More megahertz Next we have three analogue oscilloscopes with a band­width of 100 MHz. As expected, all three perform a good deal better than the less expensive instruments. This shows once again that it’s too simple to just compare specifications. We’d like to reiterate that it’s quite proba­ble that the models of the brands in the previous group with bandwidths of 100 MHz (or more...   (View)

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Gameboy oscilloscope （2）

Published:2011/8/1 2:52:00 Author:Amy

No-nonsense two-channel scopes Next we have a set of five 20- and 30-MHz oscillo­scopes. The GW Instek GOS620 has a convenient layout and is very pleasant to use. The image of the test signal is especially stable and sharp, but the display is quite a bit less bright than that of the Digimess MO20 for example. The latter also has an adjustable trigger delay fholdoff’ function). This can ...   (View)

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Gameboy oscilloscope （1）

Published:2011/8/1 2:50:00 Author:Amy

Did you know Eleklor Electronics supplies a homebrew digital memory oscilloscope? A brilliant design by Steve Willis, the GBDSO (Gameboy Digital Sampling Oscillo­scope) was published in the October and November 2000 issue. It is an extension card that turns the Game­boy Classic, Pocket, Colour or Advanced into a digital ’scope. The GBDSO rocked the electronics hobby world and that’s why we continue offering...   (View)

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Portable Tracking Systems Supported Ultra Low Power GPS Modules

Published:2011/8/1 2:32:00 Author:Amy

Line One’s new family of GPS modules provides designers an ultra low power solution to achieve high accuracy position, speed and time information from the Global Positioning System (GPS). The XE1610-OEMPVT from Xemics is a fully autonomous GPS receiver and it is suitable for applica­tions including automotive GPS sys­tems, asset management/ track­ing and portable appliances. The XE1610-O...   (View)

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The One-Millionth Bluetooth Module

Published:2011/8/1 2:08:00 Author:Phyllis

SMART Modular Technologies, Inc. shipped its one-millionth Bluetooth module since January 2003, an important milestone that demonstrated the relative success of the Bluetooth technology in the short-range wireless module market. SMART’S Bluetooth modules had been designed into PC, PDA, medical, consumer and industrial products. <...   (View)

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Multi Programmer: One Size Fits All （2）

Published:2011/8/1 1:28:00 Author:Li xiao na

By Andreas Oyrer Programming voltages ICl controls all the programming signals and voltages over its 32 I/O pins. In order to generate the programming voltages required by various microcontrollers the 5 V supply from the USB is converted to approximately 13 V using a step-up regulator. Normally the output ...   (View)

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Multi Programmer: One Size Fits All （1）

Published:2011/8/1 1:13:00 Author:Li xiao na

By Andreas Oyrer Microcontroller programmers are usually dedicated to the devices of one particular manufacturer. This multi-programmer/ however, can not only program the most important mid-range microcontrollers made by Atmel (and soon also Microchip)/ but also serial EEPROMs. Thanks to its USB interface, programming is simple, flexible and quick. This multi-programmer is tailored ...   (View)

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Wireless Tyre Pressure Monitoring （3）

Published:2011/8/1 1:10:00 Author:Amy

By Helmuth Lemme Quartz crystal sensors Still another principle has been adopted by IQ Mobil (Munich, Germany) for their tyre pressure monitoring sys­tems. The central part is a quartz volume oscillator pro­ducing a controlled amount of ’ringing’. The interrogator module emits a microwave signal (at 2.45 GHz) which is amplitude-modulated with a frequency between 6 MHz...   (View)

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Wireless Tyre Pressure Monitoring （2）

Published:2011/8/1 1:03:00 Author:Amy

By Helmuth Lemme Batteryiess systems The Lithium battery is a source of problems with all systems. Exchanging the battery is time-consuming. The battery is also heavier than the entyre electronic cir­cuit and it obviously requires a very stable mounting method in view of the cen­trifugal acceleration. When braking hard, the tempera­ture inside the tyre can reach up to 10...   (View)

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Remote Control for Your PC: With a home-made infrared receiver （2）

Published:2011/8/1 0:47:00 Author:Li xiao na

By Harry Baggen How to build an IR Receiver by Alessio Sangalli [1] provides extensive explanations and clear photographs, allowing even beginners to assemble their own IR receiver without too much of an effort. Alessio’s design is simple by any standard, consisting of an ER receive module, a voltage regulator and three passive components. (View)

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Remote Control for Your PC: With a home-made infrared receiver （1）

Published:2011/7/31 22:57:00 Author:Li xiao na

By Harry Baggen With the PC seeing increasing use as a multimedia machine, recording and playing back video and audio, users will soon want to control a number of functions remotely, just as with their TV or hi-fi set. All you need to realize this is a standard infra-red remote control unit, a homebrew receiver circuit and some software. (View)

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Electronic Valentine Heart: LEDs are red my dear（3）

Published:2011/7/31 22:20:00 Author:Li xiao na

Design by F. Wolling Printed circuit board and construction The printed circuit board designed for the project is single-sided. The 3-mm holes in it enables the LED faces to be seen from the front side. For this to work the LEDs have to be inserted from the solder side of the board, their terminals being cut, bent and then soldered to the copper pads on the board. The other three ...   (View)

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Electronic Valentine Heart: LEDs are red my dear（2）

Published:2011/7/31 22:12:00 Author:Li xiao na

Design by F. Wolling Circuit and component calculations As most of you will know, there are few, if any, applications of LEDs that do not include some form of current limiting resistor. After all, LEDs are simply diodes that light when a forward bias voltage is applied across them. They also ’exhibit’ the typical diode characteristic shown in Figure 1. If you apply a slowly rising v...   (View)

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Trends in Microcontroller （4）

Published:2011/7/31 21:25:00 Author:Phyllis

By Christian Tavernier Most programmers now prefer C or BASIC over assembler For the 8051 family there is, among others, a special Bascom version from MCS, and SDCC, a free C compiler. Only the Motorola products suffer from a sparse availability of compilers, since the amount on offer is absolutely minimal. Accepting the fact that most software developers often use identical...   (View)

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Trends in Microcontroller （3）

Published:2011/7/31 21:06:00 Author:Phyllis

By Christian Tavernier Applications Especially in cars, the use of microcontrollers is becoming increasingly important. This has resulted in manufacturers not only integrating CAN-bus controllers on their chips but the microcontrollers themselves are becoming more advanced. This is the case, for example, with the 18F2332 from Microchip, which can operate at 40 MHz. The same is true ...   (View)

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Trends in Microcontroller （2）

Published:2011/7/31 21:00:00 Author:Phyllis

By Christian Tavernier The rfPIC or ’radio’ PIC In the area of ’small’ microcontrollers it is Microchip who steals the show. Now that microcontrollers are becoming more common in remote controls, Microchip has decided to offer the rfPIC, literally the radio frequency PIC. This one is part of the small PIC-family that we discussed just before. In a single package, the rfPIC c...   (View)

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