One AC-DC converter that provides a good accuracy is SMPS AC-DC converter. Test data shows efficiency of 85. 4% at 230 Vac input and 6A output current and 83. 2% at 115 Vac input and 6A output current. This converter has the universal input voltage range. containing 92 to 276 Vac variation with only 24 mV change in the output voltage. picture below
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shows the circuit: Toggling off PB1 power push button at Vin= 230 Vac resutlt 0. 17W and at Vin= 115 Vac result in 0. 07 W power consumption. this circuit has very low power consumption. [Schematic diagram source: Motorola Analog IC Device Data] This is a circuit that produces constant current constant voltage SMPS. To efficiently charge a battery, we can use constant current constant voltage SMPS. This circuit produces 600 mA at constant current mode and 7. 2V at constant voltage mode. Here Continue reading †’. This circuit is called power factor controller with universal input circuit. It has input range about 90 to 268Vac. Any standards of mains supply in almost any country would be under that range. Maximum load of this power factor controller Continue reading †’. Capacitive power supply is one variation of uninsulated AC to DC adapter. This circuit consist of resistor, capacitors, diode and zener diode. This circuit will allow the constant voltage to across C1. The input current`s average should be equal to Continue reading †’. When the source of the sound is only intermittently exist, it`s better to turn on the tape recording only when it really present. We can control a tape recorder to switch a tape recorder on when audio is present by Continue reading †’. All types of transistors including Darlington and power will be tested in this project. Connect the 9v battery around the other way at points A and B to test PNP...
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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