Donkey sound effect Circuit using IC-555
Mini Projects
This is a donkey sound effect project that easy to builds because use simple components include three IC-555 and LM386 and more little parts. Although at present we use Micro controller IC because small. But some times it is hard to find, so this circuit is suitable for everyone. How it works In Figure 1 the schematic diagram of this projects. When press switch S1 to apply power to this project. The operation of IC1 will be 2 ranges. – First the high voltage is shown at pin 3 until full time (about 2 second), Then switch to the low …
Power Battery Saver Circuit
Basic Circuits
This is power battery saver circuit using IC-555 timer. The lamp is controlled with PWM model by adjusting of potentiometer P1. PNP power transistor to driver lamp. When use normal lamp,some times a lamp that is used have too bright. To adjust the brightness with the variable resistor, it would not be appropriate. Because power loss too much. For this circuit can save the power of battery. The brightness of the bulb is equal to the amount of power supplied to the battery. How this circuit Usually, we will enter the normal voltage to the lamp. However, high power loss. …
Simple 555 ICs tester circuit
Meters & Detectors
Most IC-555 is used to generate frequency, and sometimes we need to know. Is it good or bad? But normal multimeter cannot check it. Thus, I make a simple 555 ICs tester circuit. Which is tested correctly and faster. How it works Resistors R1-R3 acts as limit current and reduce voltage to LED1-LED3. Which is LEDs show state on “Trigger” or “Low” or “High”. The Diode D1 is set voltage to pin 2 less than 1/3 VCC (0.7 volts). When slide switch S1 at position 2 (Trigger IC). Before apply voltage to this circuit, we must put the test IC …