Processor

80C52-BASIC, 8-bit CMOS microcomputer -lumper-selectable conversion to 80C31 80C32 functionality 8Kbytes ROM (full BASIC Interpreter) 256 bytes RAM three 16-bit counter timers 32I O lines 1 l MHz system clock up to four 6264 (8Kx8) static RAM either an 8K 2764 or 16K 27126 EPROM B C C 5 2 BASIC Controller Board witft 8K RAM BCC 5 2C Lower-power all-CMOS version of the BCC52 BCC 521 Full industrial temperature range BCC 52CX CMOS. Expanded BCC6 W 32K RiM -console I O RS-232 serial port line...

Firmware Furnace

Blindsided by Technology The '386SX Embedded Firmware Project Having long ago pushed the little 8031 to its limits, Ed has set his sights on a new development platform for future projects. While some may think his choice is overkill, you'll soon agree with his reasoning. uppose your project needs a high-performance 'CPU, lots of DRAM, comprehensive interrupt and DMA support, a real-time clock, nonvolatile configuration RAM, serial and parallel ports, and a megabyte-per-second I O bus. Quick How...

Day Moneyback Guarantee

RHOMBUS DESIGNS, INC 5 Wood lawn Green, Suite 220 Charlotte, NC 28217 For instance, you may have to permit activities such as entry onto the premises around certain time, say perhaps a period of 15 minutes around 5 00 P.M. Things get a little tricky when the time is centered around 00 00. Although you can code around these special cases, doing so makes for a lot of special processing. Generally, making things as simple as possible is best, but when dealing with any nontrivial matters, there's a...

Rf Finale

I've described in detail each of the other physical layers at one time or another in the past, so it's only fair I round out the media by going over the newly released RF specification. Similar to the power line standard, RF is based on spread spectrum technology from Intellon Corporation. While the power line used a chirp, or a modified frequency sweep, to encode data, the RF specification defines a somewhat complex scheme for spreading around the transmitted energy. For me to start at the...

Hal4

The HAL-4 kit is a complete battery-operated 4-channel electroencephalograph (EEG) which measures a mere 6x7. HAL is sensitive enough to even distinguish different conscious states between concentrated mental activity and pleasant daydreaming. HAL gathers all relevent alpha, beta, and theta brainwave signals within the range of 4-20 Hz and presents it in a serial digitized format that can be easily recorded or analyzed. HAL's operation is straightforward. It samples four channels of analog...

Info

Motorola really left themselves open on this one. Although the MC146818 was fairly well thought out, at least for the time, the implementation left something to be desired. The MC 1468 18 consumed too much power, and the initial version really wasn't designed to be battery backed. The MC1468 18A corrected some problems, but other nagging difficulties remained. Because this clock eventually found its way into most PC AT-style computers, others soon noticed the market potential and decided to...

Cimetrics Technology

The network solution for embedded controllers 120 West State Street, Ithaca, New York, 14850 Phone 607-273-5715 FAX 607-273-5712 Are you looking for a 68xxx, Sparc or 386 486 C++ and ANSI C cross compiler for DOS OR UNIX Is complete source code to your compiler important to you How about a complete ANSI C library implementation, including floating point emulation Hundred Acre Consulting is now offering GNU C++ and ANSI C support in a number of native and cross compiler configurations. Hosts...

C 0su

Figure 3 TheLT1025 cold-junction compensator adds a correction signal based on ambient temperature and known characteristics of the thermocouple. The LT1052 scales the reading to a useful range. nately, the Chromel-copper and Alumel-copper junctions will also produce voltages where they enter the signal amplifier. The net result is a probe with one junction where the measurement is taken and two junctions floating around at ambient temperature, creating a subtractive error. Traditionally, the...

Program It In C

Our new Little PLC measures only 4.33 x 2.85 inches and can mount on standard din rail. This miniature controller costs only 195, including 8 optically isolated inputs and 8 relay driver outputs. Low cost expansion cards allow you to add more inputs and outputs digital and analog. It has dual RS-485 serial I O, battery backed memory and time date clock, programmable timers and a watchdog. Our easy to use and affordable Dynamic C integrated development system also costs 195. You can write simple...

Essential Hardware

A '386SX system board is a commodity that you can buy nearly anywhere, but having a good source is nice. I talked to the folks at Dream-Tech, and they agreed to offer a special deal to Firmware Furnace readers who are working on these projects. DreamTech's Firmware Furnace '386SX Package consists of a 33-MHz '386SX system board with 2 MB of 70-ns DRAM and an AMI BIOS, a combi nation I O board (with a parallel port, two serial ports, a game port, a mouse port, a floppy drive controller, and an...

News

Megatel Computer has introduced an i80386SX PC-compatible single-board microcomputer with an onboard VGA video controller. The PC II is the only SBC currently on the market that is a full function PC. The 4 x 6 board is also smaller than other '386SX-based embedded controllers and is ideal for applications where space is at a premium. Features available on the PC II include up to 16 MB of user DRAM, 32K to 256K BIOS flash memory, a SCSI host adapter, floppy disk controller, IBM monochrome and...

Infrared Wireless Relay System

The Infrared Wireless Remote Control Relay System from Channel Plus easily controls a VCR, a laser disc player, or another video source. If you use the Channel Plus modulators to distribute video signals to household TVs, you can watch and control a video source from any room. The IR Target Repeater System 2000 consists of an IR target, IR repeater, and IR LED emitter extension. The IR repeater and IR target will communicate up to 100 feet. Where placement in front of the video sources is not...

Data In

Hdsp 2113 Driver

The shift-register approach also facilitates daisy chaining '7219s to handle more than eight displays. Otherwise, all that's required is a resistor on the ISET pin to limit the segment drive current to match particular LED specs. Naturally, you can connect a potentiometer to ISET, providing manual brightness control. However, you may not need one because the '7219 includes on-chip 16-level brightness control using a driver current-controlling PWM. The device also...

Time

Actually, I think it was when the lamp turned off, the system would reset every single time We checked the wiring path, and it was as far from the signal and power leads as we could make it. Everybody was stumped I ran to the parts drawer and pulled out a big kludgy old 400-V capacitor (scientifically determined by whatever was close to my fingers in the 0.1-0.5-pF section, and a big resistor-forget the value, maybe 100 ohms ). Twisted their leads together, crimped it...

Circuit Cellar Kits

Sonar Ranging Experimenter's Kit Targeting Ranging Machine Vision The Circuit Cellar TI01 Ultrasonic Sonar Ranger is based on the sonar ranging circuitry from the Polaroid SX-70 camera system. The TI01 and the original SX-70 have similar performance but the T101 Sonar Ranger requires far less support circuitry and interface hardware. The TI01 ranging kit consists of a Polaroid 50-kHz, 300-V electrostatic transducer and ultrasonic ranging electronics board made by Texas Instruments. Sonar Ranger...

Micromint Sources 80c52 Cmos Basic Chip

Micromint has a more efficient software-compatible successor to the power-hungry Intel 8052AH-BASIC chip. The 80C52-BASIC chip was designed for industrial use and operates beyond the limits of standard commercial-grade chips. Micromint's 80C52-BASIC chip is guaranteed to operate flawlessly at DC to 12 MHz over the entire industrial temperature range (-40 C to +85 C). Available in 40-pin DIP or PLCC 4 PARK ST., VERNON, CT 06066 TO ORDER CALL

Microvolt Disagreement

As an analog design engineer, I look forward to receiving each issue of the CAJ to further my knowledge in digital and microprocessor design and applications. However, as a reader of the CAJ, I must take exception to the article Microvolt Measurements, Dec. '92fan. '93, issue 30, by Russ Lindgren. I have serious reservations that the design proposed by Mr. Lindgren would measure anything close to 18-20 bits. How did Mr. Lindgren test his design Mr. Lindgren says he presents some design tricks...

R535ji Reads Trainer

READS (Rigel's Embedded Applications Development System) and the R-535.J board constitute a complete hardware software development and debugging system in one user-friendly menu-driven environment which runs on an IBM PC host. Programs in the MCS-51 language may be written, edited, assembled, downloaded and debugged without leaving the integrated environment. The R-535.J board uses the powerful 80C535 microcontroller. R-535J READS with User's Guide on disk and example programs is priced at 150,...