A cheap garland tree and fill it full of blinking LEDs. The tree shown is a cheap garland wrapped plastic frame from Walmart. It could easily be made, but I didn`t feel like taking the time to do so. Besides, I got in on clearance, so I might not have been able to make it as cheaply as I bought it. Plus, what would I do with the left over materials They`d probably make a nice a dust collector.
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On its own, this tree is a wonderful splash of bright color in our drab camper, but it could definitely be improved. I mean, what kind of Christmas tree doesn`t have lights on it Even before electricity was invented, people lit candles on their trees to illuminate them. This seemed like a perfect project to get rid of some older LEDs I had to make room for new stock. It would also be a good use of my ever increasing pile of scrap wire pieces. All it would need is a battery, switch, and some LEDs, but of course that isn`t all I did with it. I wanted the LEDs to blink, and I wanted to control the speed. The resulting circuit is far from perfect, but it was a great first attempt at bringing a bit of Christmas cheer to a pair of nomads. I really wanted as random of a blinking pattern as possible using only a few components I had lying around. The obvious choice for controlling the speed would be a 555 timer IC in combination with a potentiometer, the challenge was creating a simple randomizing circuit. To start, I went with a 74393 counter IC to split the 555 output into varying speeds. I knew an easy way to create a lot of outputs would be to use some type of decoder, but using standard binary counting would create somewhat logical patterns. To create the seemingly random blinking, I ran the counter outputs into the inputs of a 7447 BCD to 7 segment decoder. This chip combined the abnormal BCD count with the strange outputs...
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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