Mutchus

Experts a nd amateurs have been Experimenting with radios without batteries since the wireless communication started. In many designs we've seen radios that operate without power, but all are known to use the diode 1N34. (Crystal Radio). Although significant improvements have increased the sensitivity and selectivity of these system circuits, Performances were limited until new techniques have emerged.    Here we have the first transistor radio that works without batteries, it is powered by random electric fields are everywhere in the atmosphere.  These circuits are relatively cheap to manufacture, have more volume and better reception from the crystal radios.   This circuit is a medium wave receiver and attaches easily to frequencies from 500Khz to 11Mhz. To get good results in the reception of radio stations, we should give great importance to the ground and the antenna. To listen to distant and weak stations we have to use a battery 9volt parallel with the capaci...

5V to 12V CONVERTER CIRCUIT WITHOUT TRANSFORMER Make 5V battery source capable of delivering 12V. By using this circuit you can make 12Volt from a 5volt battery. It is a very useful circuit for almost all electronics applications. Most of the circuits that we discussed so far is powered by 12V battery source. Sometimes you may find difficult to get a 12V source, in such cases you can use this circuit with a 5V source. This circuit is simple to construct, cheap and efficient. Ic LT 1070 is the heart of this circuit. It is a linear Technology switching regulator, commonly used for buck boost and switching applications. The inductor L2 and capacitor C4 forms an output filter, which eliminates the excess ripple voltages from the output. From this circuit, by an input of 5V, you will get an output of about 12V, 1A. It is transformer less stepup voltage circuit. Due to the absence of transformer the circuit is compact and cheap. COMPONENTS USED IN THIS CIRCUIT C1 100mF C2 1mF C3 1000mF C4 10...