Power supply

Sometimes we want to use. high current at a voltage 5 volts.We can do this by using the voltage regulator IC1 positive constant number 7805. The Q1 and Q2 of circuit will serve to increase current for IC regulator.The R2 acts as the anti-saturation of Q1 and Q2. Without R2 will allow the two transistors [...]

Here is the circuit diagram of a 5V buck switching regulator based on the IC LM2678 from National Semiconductors. LM2678 series of regulators are monolithic integrated circuits which provide all necessary functions required for a buck switching regulator and can drive up to 5A loads. The IC has more than 90% efficiency and has excellent [...]

Here is the simple virtual ground circuit based on discrete components. This simple design comes from miniaturization guru Sijosae. Is to make a buffer from generic discrete components. The transistors can be most any complementary pair of small-signal transistors. Suitable alternatives are the PN2222A and PN2907A. The diodes are generic small-signal types. An acceptable alternative [...]