So, if you have been following me on twitter, you might have noticed this tweet where I raved about a `Transistor Clock` kit that lets you build a wall clock using 194 discrete transistors and hundreds of other components. I`ve since purchased the kit and decided to blog my assembly of it. As electronics kits like Arduino become more and more popu
Click here to download the full size of the above Circuit.
lar, the relevance of old-fashioned analog electronics is waning. There are still a lot of common problems that can be solved simply with a few capacitors, resistors, and transistors, but many people opt to use more complex (and expensive) digital systems instead. I too have fallen victim to this trend and I feel like my analog prowess is not what it could be. I`ve had a lot of difficulty over the years understanding complex analog systems and even more difficulty trying to design them. That`s why I was excited when I saw this ad in the back of Nuts and Volts magazine: As an engineer, I have sort of a thing for clocks. See, a clock is one of the few engineering problems that has been COMPLETELY SOLVED. Seriously. You can go to Wal-mart and buy a digital wristwatch that will last for years off its internal battery, travel 100 meters underwater, keep time to the millisecond, and cost less than a night at the movies. Clocks are done. Because of this, any newly designed clock is going to be more of an artistic expression or a self-imposed engineering challenge (can we make a clock that runs off of a potato! ). The transistor clock is both. This clock is presents a statement that in the era of integrated circuits, it`s still possible to make a clock using parts from the 1950s. Every digital circuit you build with today is abstracted out of analog components, so there is a lot to learn from working with these components directly....
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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