A Polyester capacitor VS A ceramic capacitor Polyester capacitor The polyester capacitor or PET capacitor may be seen in two main varieties, namely a metallised film capacitor and also a foil version. Polyester capacitors use layers of metal and polyester or Mylar dielectric to make a wide range of capacitance values but normally within a … Read more
Inductor Is a passive two-terminal electrical component that stores energy in a magnetic field when electric current flows through it. Resistor A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active … Read more
555 timer IC structural
555 timer IC The 555 timer IC is an integrated circuit used in a variety of time, pulse generation and oscillator application. 555 operate in three modes. A-stable Mono-stable Bi-stable PIN 1 GND ;Ground reference voltage, low level (0v) PIN 2 TRIG ;The OUT pin goes high and a timing interval starts when this input falls … Read more
Electronics symbols An electronic symbol is a pictogram used to represent various electrical and electronic devices or functions in a schematic diagram of an electrical or electronic circuit. 1 wire 2 Unjoined wires 3 Cell 4 Battery 5 DC supply 6 AC supply 7 Fuse 8 Transformer 9 Earth/Ground 10 Resistor 11 Rheostat 12 Potentiometer … Read more
Material for making of a loudspeaker voice coil Material Insulated copper wire 30 AWG gauge. A piece of aluminum foil 1145. Toluene or epoxy solvent Yellow contact adhesive Slow – drying epoxy resin Scissors Masking tape Thin wooden stick X-rays plastic film A clean cloth Kraft paper Tip spear scalpel Heat gun Winding machine
STA 540 replace with TDA IC STA540 IC CAN REPLACE WITH TDA 7779 IC TDA7377 IC TDA 7379 IC TDA 5079 IC
STA540 4x13W dual/quad power amplifier The STA540 is a 4-channel, class AB audio amplifier designed for high quality sound applications. The amplifiers have single-ended outputs with integrated short-circuit protection ,thermal protection and diagnostic functions. FEATURES 2x38W into 4Ω at 18 V ,1 kHz, 10%THD 2x34W into 8Ω at 22 V ,1 kHz, 10%THD 2x24W into … Read more
TRANSISTOR TESTING Connections of digital multi meter (DMM) for testing a transistor. The reading 2.60V is equivalent to OL for some of (DMMs) Test your self Which terminal of a Bipolar junction transistor (BJT) is Base, Collector, Emitter? X=……….? Y=……….? Z=……….? The BJT transistor under testing is NPN or PNP ? There fore X= EmitterY=BaseZ=Collector … Read more
Power specification for resistor and series. Resistor; is a component used to oppose and control electric current. Resistor oppose or limit the amount of current flowing through the circuit or load. Power=current*voltage P=I*V V=I*R There for P=I*I*V Power value increase with increasing in resistor size 1/8w 1/4w 1/2w 1w 2 And increase