Hi swagatam,I constructed this circuit and it works well but the range is only 1 meter. Is a readymade circuit available ? Building a hi-end remote control device using very few components today looks pretty plausible. I have tried increasing the value of the base resistor of BC557 but no change. Sir,I have made this ckt and it is working.But initially all 4 outputs are HIGH and when I press a switch the output goes LOW.Can I reverse it?Also can u pls xplain how to connect it to relays using L293D..When I connected ,all outputs are initially high and relays are ON.The working is just opposite.Please help.I am doing this as my mini project. the bases will connect with the IC outputs via 1K resistors, emitters to positive 5V and the collectors may be then used for getting the reverse responses. Hai , I made this circuit. for knowing the exact positions of the A,B, C sensors you can read the following article, which has all the details specifically covered: https://homemade-circuits.com/2011/12/how-to-make-simple-water-level.html. sorry, your English is difficult to understand please explain in proper English.

many thanks, can you suggest a suitable npn transistor? yes it's available readymade in the market, ask your local dealer about it. and what i mean with the receiver is the receiver module. Hi Vijay, the transmitter will consume not more than 3 to 5mA, so it can be easily powered from a 9V battery and will last for years ….because the Tx will consume only when the its transmitter buttons are pressed, otherwise it will be negligibly small.. Swagatam I have connected the sensors inside the tank but when the the water level goes below s4 the motor starts . The input switches can be attached to relays and toggled through water sensor circuits.We will discuss the circuit later, first you arrange the transmitter modules, we'll proceed further once it's done. Notify me via e-mail if anyone answers my comment. hi sir,i made this ckt.but the ckt is not running ?? When I short any one of the transistors base and collector the sound goes off . The supply to the relay should come from a 12V source while the supply to the IC should come from a 5V source. The circuit diagram also shows three gates N5, N6, N7 which are configured as NOT gates for sensing the different water levels across the tank while the water is being pumped. I am not sure about that, better to buy it ready made. When I short the cables it's lighting up . Keep it depressed (by putting a heavy object over the switch). The following figure shows the pinout details of the above modules. thanks in advance. …you can do it by replacing the switch points with BC547 Collectors/emitters. Hi Rajnikanth, you can take the help of the following article: https://homemade-circuits.com/2014/05/remote-controlled-wireless-water-level.html. Thank you. The receiver unit may be placed in a suitable position with the respective load connected to it. The pins from A0-A11/1-8 & 10-13 of the HT12Encoder, are they all switches? Once you complete building and the integration process of the above circuits, its setting and testing may be done in the following manner: Initially do not connect an antenna to the receiver circuit. just make sure to use different address pin configurations for the Tx/Rx sets for the 4 units, this will ensure proper functioning of the units without cross interferences. please see the modified design below: https://www.homemade-circuits.com/wp-content/uploads/2018/06/remote-test.png. Thanks for the reply. Thus the remote controlled triggering feature of the water level controller facilitates the owner a wireless and hassle free option of monitoring and controlling a distant situated tank. Hmm unless they use 0-50% of the PWM for forward speeds and 51-100% for reverse.

Here you can find the arduino program needed for the remote, the code that I have provided here is that one I used to control this robot. The range of the above explained RF module is around 100 to 150 meters. 47 6.5K Make a Mini Wireless Keyboard From Your TV Remote by AmalMathew in Remote Control… The encoded pulse from the relevant input is transferred to the IC TWS-434 which carries forward the data and modulates it with the generated carrier waves and finally transmits it into the atmosphere.

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