8051 / 8052 Microcontroller Circuits
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AH1751 is a single-digital-output Hall-effect Sensor for high temperature operation. The device includes an on-chip Hall voltage generator for magnetic sensing, an Amplifier to amplify Hall voltage, and a Comparator to provide switching hysteresis for noise.... -
The ATA5423 ATA5425 ATA5428 ATA5429 is a highly integrated UHF ASK/FSK multi-channel half-duplex trans- ceiver with low power consumption supplied in a small 7 x 7 mm QFN48 package. The receive part is built as a fully integrated low-IF receiver, whereas.... -
Hi Everyone out there! I am new to microcontrollers. I am using AT89C55WD to control H-Bridge (L298) which in turn drives the DC motor. Circuits for.... -
using only total of 7 pins from your microcontrollers GPIO. So LCD module will cost only single port out of fours. >> The EN line is called "Enable. " This control line indicates to the LCD that we are sending it data. To send data to the LCD, the EN should.... -
Learn how to interface LCD 16x2 with 8051. Download free source code on LCD interfacing with 8051 Microcontroller .. -
Learn how to interface LEDs with 8051 Microcontroller. Download free source code and circuit diagram of P89V51RD2 Microcontroller .. -
DTMF Based Robo Car Design using 8051 Microcontroller Project. This project presents a method to control a domestic system using the DTMF tone generated by transmitting telephone instrument when the user pushes the keypad buttons of the mobile phone.... -
Project with Circuit & Code for Typing Assistant using 8051 microcontroller (AT89S52) and PS/2 keyboard port of Computer. The project also explains the interfacing of PS/2 port of computer with 8051 microcontroller .. -
Making an lcd digital watch alarm and thermometer. C source code downloaded converted that C file to Hex using KEIL and now I want to program it in chip. I have Universal programmer BEE PROG +. When I select chip and load. hex file in software, I write data.... -
i have this project which requires us to make a digital speedometer and odometer and used AT89S52. I have tried it on Proteus (ISIS) simulator and is actually working .. -
Your address bits in the encoder are floating, while those are connected to ground in the decoder. Do the same in the encoder also. Also note that when the keys in the transmission circuit are open, your input bits are floating, So pull up D0 to D3 of the.... -
The aim of developing this project is to control the speed of DC motor. The main advantage in using a DC motor is that the Speed-Torque relationship can be varied to almost any useful form. To achieve the speed control an electronic technique called Pulse.... -
This chapter contains the description of a simple development board for the study of the 8051 family of microcontrollers Unlike the development boards dedicated to the HC11 and AVR families, presented in the previous chapters, this project allows the user to.... -
This schematic is provided in the hope that it will be useful, but without any warranty, not even a warranty of merchantability or fitness for a particular purpose. The address bus in this schematic is connected in an unusual way, which is optimized for.... -
The Atmel Flash devices are ideal for developing, since they can be reprogrammed easy and fast. If you need more code space for your application, particularly for developing 89Cxx projects with C language. Atmel offers a broad range of microcontrollers based.... -
This ISP Programmer can be used either for in-system programming or as a stand-alone spi programmer for Atmel ISP programmable devices. The programming interface is compatible to STK200 ISP programmer hardware so the users of STK200 can also use the software.... -
The CODE and CONST memory classes are typically stored in ROM that may be either off-chip or on-chip. The CODE memory class is used for the actual program code while the CONST memory class is used for constant variables declared in code space. In addition,.... -
The enable signal for USB chip and GLCD controller were made by PLD decoder from the address lines. As we have seen the memory map for i/o of 8051SBC board, the available space is from 0x0300-0x07FF. The address range of 0x0300-0x03FF was used for USB chip.... -
IC4, MAX232, is used to connect to the PC by serial port. This connection is useful for debugging and controlling the robot by issuing the command through the keyboard of the PC. Though in real autonomous run of the robot, this connection would be taken off..... -
This is a "beta release" schematic. Use at your own risk The idea is to add this circuitry to a board with already has ram at 2000 and an 82C55 I/O chip to provide ports A, B and C. Warning: not shown here is a memory mapping trick which is described below..... -
A newer version of this circuit board is available. Rev 4 includes a faster CPU, more memory, more I/O and an optional LCD. We recommend you use Rev 4 for new projects. Even though this older board is no longer available, we are keeping these old pages.... -
There are some important considerations to using more memory, but it certainly is possible. the mp3 player project uses 32 megabytes! But using more memory requires careful consideration. The most important factor is that the 8051 processor has a 16 bit....
New Circuits
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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.....
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