The presented balanced voltage source can power audio amplifiers from 2 watts 310 W. Usually, amplifiers over several tens of watts require a power supply, providing two symmetrical voltages. When designing a power supply for audio amplifiers, special attention must be paid to… Continue Reading
Pulse adjustable voltage converter can work as a boost converter or inverting converter, providing negative voltage. Description of the circuit To create the converter, a specialized pulse controller MC34063 from Motorola was used. This is a universal microcircuit for building simple pulse converters.. On it you can build lowering,… Continue Reading
The interest of the presented device lies in maintaining the output voltage at a level 3,3 V when the input voltage changes in the range from 2,1 to 5,5 AT. If you add, that the maximum value of the load current can reach 150 mA and to obtain such parameters do not… Continue Reading
Electroluminescent panels are commonly used for LCD backlighting and membrane keyboards. They require a relatively high AC supply voltage to function properly., whom, usually, not in battery operated devices. The article provides a solution to such a problem.. Device, the electrical diagram of which is given… Continue Reading
Amateur radio multimeters, as well as component testers, e.g. type UTK-12, usually rated for supply voltage 7…9 V and powered by a battery of the "Krona" type, whose service life is relatively short. You can note, that cheap "Crown" can have an increased self-discharge current, because of what their… Continue Reading