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The proposed remote control circuit idea can be used for controlling any electrical gadget within a range of 100 meters. Since the idea here is to modify an existing circuit of a remote bell unit, becomes super easy without any complications. However the construction part does require the involvement of electronic assemblies so this project may not be considered entirely a layman’s project. We all have seen and probably used remote bell gadget in our homes. The device is basically a wireless RF receiver and a transmitter set which can be used for producing alarm sounds remotely for calling or indication proposes. These gadgets are pretty effective with their functions and the specified operations are done efficiently across a considerable distance. The Chinese made remote bell units are best suited for the proposed project. Basically, when the transmitter of the remote bell is pressed, it sends a strong RF signal over a radial distance of approximately 100 meters. The...

This  is a very simple power supply and most popular to use. Because this circuit is simple and easy to make. Component required is Transformer ( CT transformer ) with output secondary 12 Volt, 4 diode , 2 Condensator Electrolit , Only this component you can make this power supply. See Power Supply Schematic below :   How it works ? In the first , voltage from AC 220V or 110V entered to the transformer and will be lowered into 12V AC . And then AC voltage will  be rectified by 4 diode or you can use bridge diode to the DC voltage. And the DC voltage output will be  filtered by Condesator electrolit and the voltage output ready to use . Its DC voltage with triple voltage (+) , (-) , and ground.

Make a series letters from the LED , Things to consider before making the sign of the LED array, 1) Use LED nodes. 2) Paint the top of the PCB with a dark color (black). 3) Note the LED specifications. In this experiment use a 5mm diameter LED nodes that emit red, specification voltage of 3 volts. The assembly of LED: 1) One letter composed at most 5 columns and 7 rows. 2) One column mostly composed by 6 LEDs are arranged series. 3) Then the fifth column are connected in parallel. 4) Each column given the constraints, Rx, which amount depends on the number of LEDs in one column and depends also on the type of LED (in this experiment that used LED 5mm in diameter, clear with red light beam). 5) In a column consisting of 6 LEDs, Rx = 330 ohm, 5 LEDs, Rx = 560 Ohms, 4 LEDs, Rx = 680 Ohms Remember, this provision applies to 5 mm LED red light beam nodes. 6) Every letter was given FCS9013 transistor amplifier. Here is one letter LED scheme. Medium picture below is the lay out of the 2-lette...

For those who love tunes and the ability to take them along wherever you may roam, there are some great auto sound systems that allow you to basically plug in your favorite tunes to play as you go. It doesn't really matter which style of MP3 player you use, most of the newer auto sound systems at least have the ability to read and translate the material from these players into great music for you to enjoy on your ride by simply plugging your MP3 player into the car stereo. Many of us find that lugging around an MP3 player with all of our favorite tunes (or at least most of them-with up to 40 gigs of hard drive space it might take a while to fill completely) is much easier and more practical than attempting to lug around a huge case of CDs. It is also great for those of us who find ourselves disappointed when we purchase CDs only to find that we really only like one or two songs. Now we can simply download the songs we know and love while avoiding those we are uncertain about or at ...

Fault finding in complicated mains wirings often becomes a hard nut to crack for every electrician involved in the business. The simple circuit idea presented here can surely help them to get rid of headaches accompanied during such tedious assignments. Introduction The simple non-contact AC voltage detector, sensor, tester circuit design presented in this article will be especially useful to all those electrical engineers and electricians who are engaged in difficult electrical circuit designing, repairing and fault finding jobs. A fault inside any AC electrical system is basically caused through a break in the continuity of specific wires and may result in a major breakdown of the whole system. These breaks in the wires are generally caused by aging, short circuits, or in some places rats could be the main cause of these malfunctions. Our domestic AC mains (house wiring) voltage is made up of alternating currents that keep shifting phase from positive half cycle to negative half cycl...

Virtual cell phone battery is a replacement cell phone batteries for those of you who use the phone as a modem. Including myself, who use the phone as a modem HAIER d1200p internet.  Why must use this virtual battery. For those who surf hobby "full time" with a phone modem, would know the problem, the battery gets hot and fast reply wasteful even worn out. This tool is a good solution to keep and care for our cell phones from the possibility of damage from over-charging its battery.I created a virtual battery works as follows:We take the source of its power supply from the USB port because the port is very easy and simple to use and simply provide a standard current source when the phone is online (500-750mA). The workings of the circuit is as follows:Diodes or diode 2Amper in 5239 this standard to provide a useful addition to the polarity of the voltage which is also a component of protection against misuse. You can just use a 1 Amp diode (IN4002-4007). I use the IN 5239 is ...

Hello guys. Today I will guide you how to make a Digital Thermometer Circuit using IC DS18B20 and PIC 18F4550. I also provide you the source code of this project. Thank you for reading my blog :) Digital Thermometer Circuit Please go through the characteristics of IC DS18B20 and PIC 18F4550 that can be used to make a Digital Thermometer Circuit first and then run the code below. For PIC18F4550: - Flash: 32K bytes - Single-Word Instructions: 16384 - SRAM: 2048 bytes - EEPROM: 256 bytes - I/O: 35 - 10-Bit A/D (ch): 13  Y Y 1 - CCP/ECCP (PWM): 1/1 - SPP: Yes - SPI: Yes - Master I 2C™: Yes - EAUSART: 1 - Comparators: 2 - Timers 8/16-Bit: 1/3 Special Microcontroller Features: • C Compiler Optimized Architecture with optional Extended Instruction Set • 100,000 Erase/Write Cycle Enhanced Flash Program Memory typical • 1,000,000 Erase/Write Cycle Data EEPROM Memory typical • Flash/Data EEPROM Retentio...