How to use your existing infrared transmitter from any room in the house. The principal is really pretty simple, and it works better than you would think. This is a `very handy` little project. With this gadget you can control anything from pretty much anywhere. Even place your stereo equipment inside an enclosure then use your existing IR remote control without line of sight. Adjust the volume on your
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stereo from other rooms in the house. You name it - so enjoy. ;o] I have tested both circuits with TV`s, stereo`s, and various VCR`s & CD players. I can change channels, adjust volume, etc, from any room in the house (and outside) where I have the IR to RF circuit in Figure #1. The RF to IR circuit in Figure #2 is placed on a bookshelf across our living room, and aimed in the direction of our TV & stereo. Note: You can place the IRLED on long wires to extend it right onto the front of the equipment you need to control and do away with the Zetex 603 High-Current IRLED drive circuit. I`m a little power hungry, and always like to see just how far I can push the envelope, but you may prefer to tone this down a bit. You can directly drive the IRLED with a single series resistor on the 40kHz modulating PIC for much shorter range operation. We`ll use our existing infrared remote control transmitter for our TV. We`ll transmit to the IR detector shown in Figure #1 below. The IR signal from our transmitter is output on the TSOP-1140 40kHz IR detector module data output pin (labeled RX DOUT) in Figure #1. The IR detectors output signal feeds data to the input of the TXLC-315 RF transmitter module through the 2N3906 PNP transistor inverter circuit. When no data is being received from the IR transmitter, the PNP transistor & TXLC-315 RF module are both OFF. We need this inverter circuit since the TXLC-315 data input needs to be held at...
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....
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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....
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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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