When I purchased this little charger back in 1970 I didn`t think I`d be writing about it today but here we are! Back then I was a lot younger, I had an old car for transportation, and it had an old battery. It didn`t have a lot of cranking power when the weather turned cold, so I had to find a way to keep my wheels running. This little charger was
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the answer to my problems. But I digress. What brings us here today is a friend of mine, asking how to build a battery charger. He tells me that he has a couple of transformers and wonders what else is needed to make one. Well that`s a pretty good starting point having a transformer, and there`s not much more required to complete the job. A charger for a car battery can be really very simple, as long as there is a human to monitor the charging process. Cars and tractors have a Lead Acid wet cell battery, usually 6 or 12 volts. We`ll be looking at this Woodward-Schumacher Electric Corp. One Amp battery charger to get some ideas about what it takes to make one. I did a Google search and found Woodward-Schumacher is still in business designing and selling battery chargers. That is remarkable. To charge a Lead Acid battery is a fairly easy. DC current is driven into the battery from a controlled power source. Controlled to limit the current to a maximum level appropriate for the size of the battery, usually around 10% of the battery capacity. A 100 Amp Hour battery would be 10 Amps maximum, but following the battery manufacturer`s recommendation is always the best option. This One Amp charger can charge a larger capacity battery, it will just take longer to get fully charged. The simplicity of this charger is elegant because of these two parameters, however care must be taken by the person using a unit like this because 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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