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ster Capacitor C2_470pF 63V Polystyrene or ceramic Capacitor C3_47 µF 63V Electrolytic Capacitor C4, C8, C9, C11_100nF 63V Polyester Capacitors C5_10pF 63V Polystyrene or ceramic Capacitor C6_1 µF 63V Polyester Capacitor C7, C10_100 µF 63V Electrolytic Capacitors D1_1N4002 100V 1A Diode D2_5mm. Red LED Q1, Q2, Q4_MPSA43 200V 500mA NPN Transistors Q3, Q5_BC546 65V 100mA NPN Transistors Q6_MJE340 200V 500mA NPN Transistor Q7_MJE350 200V 500mA PNP Transistor Q8_IRFP240 200V 20A N-Channel Hexfet Transistor Q9_IRFP9240 200V 12A P-Channel Hexfet Transistor R1_3K9 1W Resistor C1, C2_4700 µF 63V Electrolytic Capacitors (See Notes) C3, C4_100nF 63V Polyester Capacitors D1_400V 8A Diode bridge D2_5mm. Red LED F1, F2_4A Fuses with sockets T1_230V or 115V Primary, 30+30V Secondary 160VA Mains transformer PL1_Male Mains plug SW1_SPST Mains switch To celebrate the hundredth design posted to this website, and to fulfil the requests of many correspondents wanting an amplifier more powerful than the 25W MosFet, a 60 90W High Quality power amplifier design is presented here. Circuit topology is about the same of the above mentioned amplifier, but the extremely rugged IRFP240 and IRFP9240 MosFet devices are used as the output pair, and well renowned high voltage Motorola`s transistors are employed in the preceding stages. The supply rails voltage was kept prudentially at the rather low value of + and 40V. For those wishing to experiment, 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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