To send the Sony command `TV - mute`, the command would be infraout 1, 20. Note that device should always be 1 when used in PICAXE projects and data can only be between 0 and 127, as the SIRCS protocol only specifies 7-bit capability. The full program for the transmitter is shown in Fig. 6. As infrared signals are easily corrupted, the
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data is actually sent 10 times to increase reliability. This matches commercial remote controls that tend to transmit the data at 45ms intervals whilst the button is held down. Note that the program uses codes "1", "2" and "3" for the three switches, but you can edit these to any number between 0 and 127. This would be useful when you want to control multiple units in the same room, using different data commands for each unit. As hinted at in September, the various tunes played by Rudolph can be triggered remotely using an infrared transmitter. This simple project uses a PICAXE-08M micro, three push-button switches and an infrared LED to make a complete hand-held remote, the circuit for which appears in Fig. 2. A second visible LED is included for user feedback. Fig. 2: circuit diagram for the simple infrared transmitter. As no serial link socket is provided, the PICAXE chip must first be plugged into the "Rudolph" PC board (described in September 2004) for programming. Assembly is very straightforward and should only take a few minutes. Begin by installing a wire link in the position indicated by a dotted line on the overlay diagram (Fig. 3). An off-cut resistor leg is ideal for the job. Note that as an IC socket will be mounted over the link, it must be lying flat on the PC board before soldering. Install the two LEDs next, noting that the infrared LED (IRLED1) leads must be bent at 90 degrees so that it points away from...
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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