Circuit knowledge

Showing posts with label circuits. Show all posts

Wednesday, September 24, 2014

Simple Schmitt Trigger Circuits

By replacing the common-emitter resistor in a conventional Schmitt by a zener diode,the hysteresis normally associated with these circuits is eliminated.

One cheap IC, ul.914, can be used as an extremely simple and effective Schmitt trigger suitable for many applications. Hysterisis of the circuit is about 0.1 Volt. This may be varied by altering the values of R1 and R2.

An LED and phototransistor optical coupler system may be used to lengthen a three microsecond pulse to 55 milliseconds by using the values shown in the diagram. This allows complete isolation between input pulse circuits and the lengthener to be obtained.

Thursday, September 11, 2014

Electric Zero Voltage Switching Circuits Wiring diagram

This is the Electric Zero Voltage Switching Circuits Diagram. These diagram are effective for lamp and heater loads. Some diagram driving reactive loads require integral cycling and zero-voltage switching-when an identical number of positive and negative half cycles of voltage are applied to the load during a power period.

Electric Zero Voltage Switching Circuits Diagram

The schema, although not strictly a relay because of the three-terminal power connection, performs the integral cycle ZVS function when interfaced with the previous coil diagram. Fiber optics offers advantages in power control systems. Electrical signals do not flow along the nonconducting fiber, minimizing shock hazard to both operator and equipment. EMIIRFI pick up on the fiber is nonexistent-although high gain receiver diagram might require shielding, eliminating noise pick-up errors caused by sources along the cable route.

Both ac and de power systems can be controlled by fiber optics using techniques sinillar to the optoisolator solid-state relay. Triac triggering is accomplished through the Cl06BX301, a low gate trigger current SCR, switching line voltage derived current to the triac gate via the full-wave rectifier bridge. The primary difference between fiber optics solid-state relay diagram and optoisolator diagram is the gain; photo currents are much smaller.

Saturday, September 6, 2014

50W car audio amplifier schematic circuits

Car power amplifier uses SI1050GL IC as the main amplifier. The output power 50 Watt 8 ohm mono impedance. Up to 25 Volt DC voltage. with source voltage of this amplifier car battery has to work.

Thursday, September 4, 2014

6 12 Volt audio amplifier circuits

The above is an amplifier circuit using supply voltages from 6 volts DC to 12 Volt DC. Power output of the amplifier is quite low with only 1 Watt 8 ohm impedance. You can apply this to the audio signal amplifiers that require strengthening are not so large as in the pocket radio.

Saturday, August 30, 2014

LM317 Simple Audio Amplifier Circuits

You most likely know that LM317 IC is applied as an practical provide regulator, but did you know it can be applied as an audio amplifier? This is a Low power Amplifier LM317 Simple Audio Amplifier Circuit a audio designed with LM317 that offers a optimum probable 1W audio strength.

LM317 Simple Audio Amplifier Circuit Diagrams :

LM317 Simple Audio Amplifier Circuits

Utilization a amazing heatsink for the LM317 IC and modify the 5K various resistor so that you have 4.5V on 10Ω resistor (or LM317 pin 2, Vout).