Rangkaian Lampu Emergency IC 555

Skema Rangkaian Lampu Emergency IC 555

Emergency Lamp With 555 is a single option for lighting in the course of electrical power outages. With Emergency Lamp Sequence 555 uses a 12VDC voltage source that can be provided from your 12V battery. Emergency Lamp 555 Sequence With these incredibly very simple and easy to make because each of the components simply accessible from the market place. Emergency Lamp Sequence With this particular 555 can flip to the light 5W-10W. The circuit is developed with the astable multivibrator together with the IC 555 that is certainly employed to mendrive transformer by way of Q1. For extra details is often viewed right in the series Emergency Lamp With 555 follows.

Functioning frequency range of 555 Emergency Lamp With this particular set of configurations R1, R2 and C2. T1 in sequence Emergency Lamp With 10V 500mA 555 is actually a transformer. Secondary element (0-10V) is connected for the Q1 to get offered the signal from your multivibrator. Then the primary (0-220V) is linked on the lamp.

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RANGKAIAN MIKROKONTROLER at89s51 JAM DIGITAL

RANGKAIAN JAM DIGITAL MIKROKONTROLER at89s51

A digital clock is 1 that displays time digitally. The circuit explained here displays time with two ‘minutes’ digits and two ‘seconds’ digits on four seven segment displays. The seven segment and switches are interfaced with 8051 microcontroller AT89C51. This circuit may be used in vehicles, houses, offices and many others. The moment the Vcc supply is supplied to this circuit, the clock begins from 00:00. Time is displayed on four 7 segments (in frequent anode configuration) by utilizing the notion of multiplexing. That is reached by utilizing timer interrupt (Timer0) of AT89C51 which is configured to refresh 7 segments. The segments are refreshed numerous periods in the 2nd for simultaneous show. The clock runs which has a delay of precisely a single 2nd. Timer1 is used to produce a time delay of a single second. The info pins (a-h) of the many segments are interconnected and get signal from port P2 in the microcontroller. The control or allow pins (popular anode) are connected to pins 1-4 of port P1 (P1^0 - P1^3).

The number on 4th section (displaying the unit digit of 2nd) is incremented as soon as in the 2nd since it goes from 0 to nine. The range on 3rd section is incremented just after every 10 seconds from 0 to 5. Hence seconds are displayed different from 00 to 59. The digit to the 2nd section variations after every 60 seconds (a minute) from 0 to nine etc. So the clock runs for an hour and following that it resets to zero once more

source:engineersgarage.com

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Rangkaian Microcontroller at89s51

Moisture Controller Circuit Use Microcontroller at89s51|Rangkaian Microcontrollerat89s51

INTRODUCTION:

This moisture controller circuit is based on the MICROCONTROLLER AT89S51 & the ADC 0804. This project demonstrates how analog data is converted in to digital form, so it can be displayed on the LCD. It also covers the sub rooting of microcontroller interface with LCD. AT89S51 is an 8051 compatible microcontroller from the ATMEL family. ADC0804 is a single channel ADC, in this project it is configured in auto mode i.e. It converts the incoming analog signal into the digital form continuously without generating any interrupt. The main board is provided with three keys for incrementing, decrementing & enters for setting the cut of point of moisture value.

This project demonstrate how we can use a simple electronics for controlling the proper growth of a particular crop or a plant in the field by controlling the amount of water required by the plant for healthy growth. This is done with the help of two probes which are used as sensor. This metallic probes are inserted into the soil of the field, when water supply to the is started the soil starts absorbing water, this results in the low resistance in between the two probes. As the soil becoming more and more wet stimulatingly the resistance between the two metallic probes goes on reducing this signal is provided to the ADC, it converts the analog signal into digital form, for the microcontroller use. Three push button keys are provided, through which the user can set the cutoff point of the moisture according to the crop requirement. When the set value is achieved the microcontroller switch off the water pump by a relay switch.

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Infrared Transmitter-Receiver with 555

555 Infrared Transmitter-Receiver

Infrared transmitter and receiver circuit shown in the schematic diagram below can be used as remote control. The transmitter is basically an oscillator circuit, and the frequency can be adjusted using R1 potentiometer (or trimmer pot). This oscillation makes sure if the signal can be distinguished from other source by the receiver.

The receiver is actually a bandpass filter which filter out noise signal. The frequency of this filter is determined by L and C in the feedback path (from output to inverting input of the op-amp). D1 is inserted in the feedback path to enable rectifying very small signal, since the op-amp feedback mechanism will compensate the forward drop voltage of the diode. The last op-amp is employed as a comparator, with the threshold is adjustable via R3 potentiometer. The op-amp should be supplied with + and – 12Volt, and the R3 potentiometer should be supplied with -12V. [Circuit's schematic diagram source: hobbyprojects.com]

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AT89S8252 Electronic Voting Machine Circuit Diagram

AT89S8252 Electronic Voting Machine Circuit Diagram

Now-a-days Electronic voting machines are being used effectively. The confidence of the voter in its flawless working is gradually building up and these machines are thus becoming quite popular throughout the country.

Features of the electronic voting machine include avoidance of invalid votes and reduction of counting time and the consequent expenditure incurred on manpower deployment. By using the Microcontroller the voting machine can be built up easily and it will make simple to operate.

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