The first schematic is for those who never buy parts anywhere but Radio Shack. You can walk in the store and walk out with all the electronics that you need. For the heat sink, sorry to say, you`re on your own. Find a hardware store and buy a big chunk of aluminum. Saw the aluminum chunk into two pieces. Paint the aluminum pieces flat black. The p
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aint actually increases the magical powers of the heat sink. No kidding. Slather the transistors with silicon heat sink grease. Bolt each power MOSFET to its own piece of aluminum. Go in peace. Play loud. Sing until you steam up your bedroom or either a girl or the police show up. (If you`re a girl rocker, howdy! Beg pardon. If you`re a girl cop who plays rock music, cool. ) As I Promised, the first amp is as close to a Radio Shack-only circuit as I could come. This is a quasi-complementary circuit, because Radio Shack only sells an N-channel power MOSFET. We`ll use two of Radio Shack`s IRF510-type MOSFETs. Fortunately, the IRF510 is an excellent device. It`s exactly what we need: Rugged, sensitive and noncritical: A complete package. Phase Splitter. The two JFETs make up a differential phase splitter. I tried a one-device splitter, but it couldn`t put out enough voltage to get a big swing from the output MOSFETs. The two-device phase splitter also provides needed voltage gain. The JFETs are common types, such as MPF102 or 2N3819. (Only equivalent devices will work. Remember, these aren`t bipolar transistors. Unlike transistor specs, the IDSS and forward drop of FETs vary. ) In this quasi-complementary circuit, a differential phase splitter sends the original signal and its mirror to output MOSFETs Q3 and Q4. Since the MOSFETs are in series, output peaks are higher than with a single-ended circuit. Source Resistor. In 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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