555 IC is used in this TV Remote Signal Jammer Circuit. It makes fake IR signals same as remote so TV get confused. TV can not get the real remote signal. We can watch the show without anyone changing the channel. Parts used to complete this circuit are IR LED, ceramic capacitor, NPN transistor, potentiometer, […]
3V to 9V Dual Power Supply Circuit
IC 555 is used in easy circuit. Make both plus and minus voltage from one 3V source like two AA battery. It is useful for 3V to 9V Dual Power Supply Circuit. 555 work as astable multivibrator in circuit. It make square wave again and again on output pin 3. Outside resistors and capacitors control […]
Simple Voltage Follower Circuit using Op-amp IC 741
Simple Voltage Follower Circuit using Op-amp IC 741 give output same like input. It is also called buffer amplifier or unity gain amplifier. IC 741 op-amp is cheap and useful that is why so many people use it. Voltage follower has high input impedance and with low output impedance. It can give current to many […]
Analog to Digital Converter Circuit using IC 555
The easy way to change sensor voltage (analog) to digital (1 and 0) is by using Analog to Digital Converter Circuit using IC 555. This method is cheap and easy for good learning. IC 555 chip can make simple ADC with low cost. In this circuit 555 IC work like ON/OFF pulse maker. Two pins […]
Frequency to Voltage Converter Circuit using IC 555
Input signal with some frequency goes into FVC (frequency to voltage converter). Output is DC voltage which matches that frequency. We can make Frequency to Voltage Converter Circuit using IC 555 in monostable mode. FVC useful for many things where we need check frequency like: Circuit Working: Parts List: Category Description Quantity Resistors (All resistors […]
Simple Wireless Mobile Phone Charging Circuit
This article talk about two main parts for wireless phone charging: Making Simple Wireless Mobile Phone Charging Circuit is easy. We only need resistors, capacitors, diodes, voltage regulator, copper coils and transformer to make circuit work good. Transmitter Circuit Working: Parts List: Category Description Quantity Resistor 1k 1/4 watt 1 Semiconductors Transistor TIP35 1 Transmitter […]