Here we show you how to hack a TV-B-Gone into the case of a vintage television remote control, such that the original on/off button instead activates the TV-B-Gone. We also modify the power supply so that it runs off of a regular 9 V battery, instead of a set of lithium coin cells. The TV-B-Gone, manufactured by Cornfield Electronics, is a hacker`
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s delight: a simple, single purpose gizmo that`s easy to take apart. It`s a super-universal remote with a single purpose: turning off televisions. I got mine for $20 at Fry`s Electronics. I could have bought it elsewhere, but here`s the thing: Fry`s sells televisions! This is very important, because you can try before you buy. The TV-B-Gone is found in the toy section. Grab one off the rack, press the button, and it lights up a little blue LED so that you can see that the battery isn`t dead. Now carry it over to the section where they have rows and rows of televisions, and so that you can really test that it works. It`s amazing: You can get your money`s worth before you even buy it. The big chip is a Zilog ZLR32300 series processor; a programmable microcontroller designed specially for use in infrared remote controls. (Sheesh, these things are specialized!) There is also a crystal oscillator for the processor, a pushbutton switch trigger, a large infrared LED, a tiny blue LED that blinks along with the infrared LED, two drive transistors one for each LED, and three support resistors. The design is straightforward, clean, efficient, and provides easy access at all the right points for modification. Nice! There are three lithium batteries in the TV-B-Gone. The two thin lithium batteries on the top side (the side with all the components) are in series to give a total of 6 V. These provide the high-current drive for the...
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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