Electronic Circuits Schematics Projects




Computer Circuits


Computer circuits categories are good both for a bright kid or an adult that wants to construct some useful Computer circuits. There is plenty of information and several important concepts. Some are Clear and clean schematic diagrams, some are CAD produced pcb layouts, are all here. 100s of Computer circuits for every hobbyist, technician, student, and design professional. An nice reference tool which includes lots of Computer circuits. look at these circuit ideas, some of them may need some modification if they are to work as advertised. Ideas along with pretty good descriptions for each circuit.

Musical Instrument Digital Interface (Midi) Transmitter Circuit

Used for digital control of musical instruments, this transmitter converts the digital data signals to equivalent optical signals for fiberoptic cable interface. Optocoupler IC1 provides isolation, and drives IC2-a and -b and Tl,..


Views: 8 | Votes: 11 | Comments: 0 | Rating: 3 | Rank: 5 | Added: Mar 30, 2013 |
Microcomputer circuit

This is a 8048/IM80C48 Microcomputer with 8 character 16-segment ASCII triplex liquid crystal display. The two bit character address is merged with the data and written to the display driver under the control of the WR line. ..


Views: 3630 | Votes: 25 | Comments: 0 | Rating: 7 | Rank: 5 | Added: Mar 23, 2013 |
Modem shutdown Indicator

The circuit has been designed to accommodate all those who dedicate many hours of their lives by exploring the endless pages of this site. Despite the fact that it consists of only three components (Most were not little!), Is able to provide an indication of whether it actually released the telephone line after a long connection via modem to the network. This can be particularly useful, since there In many cases, the computer claims that the telephone network connection.....


Views: 232 | Votes: 52 | Comments: 0 | Rating: 3 | Rank: 2 | Added: Mar 11, 2013 |
Low-power-rs-232c-driver

This circuit draws only 4 mA from a 5-V supply while driving a standard RS-232C receiver. The system clock drives a de-de converter that produces -3.4 V. The frequency can range from 0.5 to 8 MHz, but a range of 0.5 to 1 MHz will minimize power dissipation. The circuit output withstands direct shorts to ground or to either of the supplies ( ±12 V max). ..


Views: 5 | Votes: 56 | Comments: 0 | Rating: 4 | Rank: 5 | Added: Mar 10, 2013 |
Z80 clock circuit

The circuit will operate reliably from below 1 MHz to above 400 MHz. With Vcc = 5 V the output of the second inverter essentially attains a full swing from 0 V to 5 V. Such large logic output levels and broad frequency range capabilities make this oscillator quite suitable for driving MOS components such as CPU, controller chip, peripheral devices, as well as other TTL products...


Views: 2665 | Votes: 43 | Comments: 0 | Rating: 1 | Rank: 4 | Added: Feb 24, 2013 |
Deglitcher

Glitch has been a universal slang expression among electronics people for an unwanted transient condition. In D/A converters, th..


Views: 1 | Votes: 33 | Comments: 0 | Rating: 9 | Rank: 5 | Added: Feb 22, 2013 |
Stalled-Output Detector

This circuit can be used to detect a stuck output or node in a circuit, or a loss of data or pulses. The pulse trai..


Views: 2 | Votes: 24 | Comments: 0 | Rating: 2 | Rank: 5 | Added: Feb 16, 2013 |
Mux-Demux system

A number of signals may be sent between two points simultaneously by making a slight modification in the receiver circuit. ..


Views: 2044 | Votes: 94 | Comments: 0 | Rating: 9 | Rank: 4 | Added: Jan 26, 2013 |
Printer Error Alarm

When a printer is shut down, this alarm sounds an alarm. The input can be either a high-to-low or low-to-high transitio..


Views: 0 | Votes: 7 | Comments: 0 | Rating: 1 | Rank: 5 | Added: Jan 24, 2013 |
Data acquisition system

Charge redistribution to achieve A/D conversion. In typical applications, as a ratiometric conversion system for a microprocessor, V^p, will be connected to ground and VREF+ will be connected to Vcc. ..


Views: 5352 | Votes: 52 | Comments: 0 | Rating: 1 | Rank: 3 | Added: Jan 21, 2013 |
Computer-speech-synthesizer

This text-to-speech converter is built around the SP0256-AL2 speech processor and the Cf6256AL2 text-to-speech converter chips~manufactured by General Instruments. The circuit is set up to receive standard ASCII code from virtually any microcomputer or dumb tenninal that is equipped with an RS-232 port -such as a serial-printer or modem port. If a microcomputer is used, the synthesizer can be activated from a terminal-emulator of any communications program, or from any.....


Views: 9 | Votes: 92 | Comments: 0 | Rating: 6 | Rank: 5 | Added: Jan 14, 2013 |
Allophone-generator

The circuit, a general-purpose system with many uses, vocalizes 59 allophones contained in the speech processor. After filtering and amplification, its pulse-code-modulated output can drive an 8-!l speaker. The processor"s address pins, Al to A6, define 64 speech-entry points. Closing the test switch to the NAND gate lowers its output, thereby loading an address and triggering the ALD input for an allophone cycle. ..


Views: 6 | Votes: 43 | Comments: 0 | Rating: 7 | Rank: 5 | Added: Jan 13, 2013 |
Versatile One-Shot Cpu Interface

Process-control applications often require a monostable multivibrator (one-shot) with a pulse width that c..


Views: 0 | Votes: 43 | Comments: 0 | Rating: 7 | Rank: 5 | Added: Dec 19, 2012 |
Rgb-blue-box

The RGB blue box turns your PC"s RGB-monitor screen blue at the flip of a switch. That is, it makes your computer display bright white text on a blue background, instead of the usual low-intensity white on black. The RGB .blue box connects between your IBM PC color graphics adapter, or equivalent, and your RGB color monitor. By flipping a switch, you choose between two modes. One mode passes the signal from the PC to the monitor unaltered; the other transforms it.....


Views: 1 | Votes: 75 | Comments: 0 | Rating: 5 | Rank: 5 | Added: Dec 15, 2012 |
Mp pulse width control

Differential multiplexers are generally used in process control applications to eliminate errors due to common mode signals. In this circuit however, advantage is taken of the dual multiplexing capability of the switch. This is achieved by using the multiplexer to select pairs of RC networks to control the pulse width of the multivibrator. ..


Views: 4232 | Votes: 61 | Comments: 0 | Rating: 9 | Rank: 4 | Added: Dec 8, 2012 |
I/O Line Protectors

A 5.1-V zener diode clamps positive-going transients, and a Schottky rectifier clamps negative-going transients. Th..


Views: 0 | Votes: 11 | Comments: 0 | Rating: 1 | Rank: 5 | Added: Dec 2, 2012 |
Pc Password Protection Circuit

With this circuit, a PC will be protected, requiring a password to boot. After three times, the computer will have to have a cold reboot and the password tried again...


Views: 9 | Votes: 78 | Comments: 0 | Rating: 1 | Rank: 5 | Added: Nov 26, 2012 |
Dvm Adapter For Pc Circuit

The adapter consists of a voltage to frequency adapter with a signal conditioner and protection circuit. J2 connects to the game port of a PC. ..


Views: 9 | Votes: 66 | Comments: 0 | Rating: 6 | Rank: 5 | Added: Nov 24, 2012 |
Modem/Fax Protector For Two Computers Circuit

This modem/fax protector can be used in telephone-line connections between a PC or a terminal and a distant computer. In this circuit, the SVPs (surge voltage protectors) are rated at 230 V...


Views: 2 | Votes: 98 | Comments: 0 | Rating: 6 | Rank: 5 | Added: Nov 24, 2012 |
Rs-232C Line-Driven Cmos Circuits

The circuit illustrates a way to power CMOS ICs from RS-232C lines. The MAX680 is normally used to genera..


Views: 2 | Votes: 95 | Comments: 0 | Rating: 6 | Rank: 5 | Added: Nov 8, 2012 |
 
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