Computer Circuits
-
Modems are devices that connect either remote devices to a computer, or two or more computers to each other. Their connection is usually wired. The GSM modem we present is wireless. It can connect two computers, a computer with the internet or even be the.... -
DAC0832 is a memory device having two input engrave a D/A converter chip, can be connected directly to the computer bus. Its main properties are as follows: 8-bit resolution; s.. -
DAC0832 shown in Figure 27-13 cushion in the form of a single-phase circuit connected with 8086CPU. Since DAC0832 internal 8-bit data input must be set between the CPU and D/A .. -
Face through attendance as the worlds first embedded facial recognition machine, the error rate is less than one hundred thousandth of the rejection rate of less than one perce.. -
FM24C256 as shown 27-54 slave interface circuit I2C bus, the address format shown in Table 27-3. A2, Al, AO is set to low (when extended storage capacity, the need to change A2.. -
Digital signal processing circuit when work needs to cooperate with it with a memory for temporarily storing image data. DPTVT-3D/MV digital processing chip need four KM416S102.. -
Discharge After the memory circuit After the memory circuit is also an instantaneous action, the delay reset circuit. When the input signal to a movement that is open when the .. -
Discharge before memory circuit Before the memory circuit is considered instantaneous action, the delay reset circuit. When the input signal to one that is action, and start ti.. -
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. .. -
The data separator is intended for use with 8" flexible diskettes with IBM 3870 soft sectored format. The circuit delivers data and clock (B) and clock pulses (D). These two signals must be in such a sequence that the negative edge of the clock pulse is at.... -
An op amp is used to interface between a fiberoptic system and the MOS SCR to multi-cycle, half-wave control of a load. This receiver has two complementary outputs, one at a quiescent level of about 0.6 V and the second at 3 V. By adding a 4.7 V zener in.... -
With this dataselector, only one RS-232 port is used to connect two RS-232 devices (i.e., printer, plotter, etc.) with a mini-or microcomputer. The operation is very simple. Power on will reset FFI (QFFT ~ Low), which enables gates N1, N5, and N7. Now.... -
Circuits to interlace the Si7135 directly with two popular microprocessors are shown in Figs. 18-2a and b. The 8080/8048 and the MC6800 families with 8-bit words need to have polarity, overrange, and underrange multiplexed onto the digit 5 word. In each.... -
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.... -
This circuit determines whether more than one input in a group of digital inputs is active. It provides a digital measure of the number of active inputs, and it allows you to establish a threshold for majority-decision applications. That is, whether the.... -
This RS-232 type line receiver to drive CMOS logic uses a Schmitt-trigger feedback network to ~give about 1-V input hysteresis for added noise immunity. A possible problem in an interface which connects two pieces of equipment, each plugged into a different.... -
The circuit uses one-half of a dual D flip-flop as an inverter. When the input decreases, the flip-flop resets, and its Q output increases. When the input increases, the reset line is released and Q gets clocked low. The rc delay between applying the input.... -
The IBM PC debugger plugs into the PC"s math-coprocessor socket.The 8288 bus controller, IC1, regenerates control signals from the processor"s status signals, SO, Sl, and S2. Reset LED Dllights if reset is active and holding the processor. Clock status LED.... -
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.... -
When driving MOSPOWER in a totem-pole output configuration, it is necessary to have the gate voltage 10 to 15 V positive with respect to the source in order to handle load currents near the MOSPOWER maximum ratings. The D169 lends itself to.... -
The circuit illustrates a method of interfacing a HEDS-1000 emitter-detector pair with a HA-5144 for use as a bar-code scanner circuit. The HA-5144 is used as an amplifier system which converts the bar and space widths of the printed bar code into a.... -
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.... -
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.... -
The 555 acts as the tone generator configured in the astable mode. Its pin 3. square-wave output is transformed into a triangle wave by Rl and C2. The voice"s pitch is controlled by RL Transistor Ql can be 2N1086, 2N1091, or any other equivalent npn.... -
This hardware-software combination deletes clocks from the slave until both /iPs synchronize. The firmware.. -
This protection circuit is inserted between the reset switch and the motherboard. The earth connection of th.. -
A 5.1-V zener diode clamps positive-going transients, and a Schottky rectifier clamps negative-going transients. Th.. -
Getting microprocessor designs to work is notoriously difficult when both the software and hardware are new. The .. -
The circuit illustrates a way to power CMOS ICs from RS-232C lines. The MAX680 is normally used to genera.. -
Glitch has been a universal slang expression among electronics people for an unwanted transient condition. In D/A converters, th.. -
Process-control applications often require a monostable multivibrator (one-shot) with a pulse width that c.. -
Keyboards can be slotted into two categories, at least as far as the manner that the switches are connected is co..
New Circuits
-
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of.... -
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is.... -
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to.... -
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This.... -
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the.... -
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,.... -
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the.... -
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power.... -
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
Popular Circuits
Now-a-days every institution needs automation. As a part of college automation, we have decided...
The Hand Steadiness Tester is a game which tests the steadiness of your hand. The player has to...
This kit provides a variable output power supply ranging from 1.2 to 15 V @ 3 A. It uses Low...
The figures below illustrate using opamps as active 2nd order filters. Three 2nd order filters...
The D169 serves as a level detector and provides complementary outputs. The op amp is used to...
This text-to-speech converter is built around the SP0256-AL2 speech processor and the Cf6256AL2...
A shows a COR/CAS circuit for repeater use. CR1 is a silicon diode. 2 may be any relay with a...
The telephone ring generator shown below generates the needed high voltage from a simple...
We decided to design and build a robot capable of vacuuming the floor of a room or area without...
I`ve re-drawn it to appearance the Colpitts oscillator added clearly. L is about 1. 5 uH; 19...
I would like to convert a TTL square wave into sine wave. The frequency range of the square wave...
The first half of the circuit (IC1a) it has an input sensitivity of 3 mV and has a frequency...
This is a complete alarm system with 5 independent zones suitable for a small office or home...