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 […]
Simple Flasher Circuit using LED and LDR
LED and LDR are used to make this easy and Simple Flasher Circuit. LDR changes resistance when light changes and this control LED blink. There is no need for big chips or transistors but still the LED blink happens. It uses simple parts like resistor, capacitor and special light sensor called LDR. Circuit Working: Parts […]
Simple Door Open Alarm Circuit using Reed Switch
Simple Door Open Alarm Circuit using Reed Switch uses reed switch which makes alarm sound when door opens. This simple circuit help protect door from people not allowed. It have reed switch, transistors, resistors, buzzer, diode and LED. Reed switch control power to alarm. Circuit Working: Parts List: Category Description Quantity Resistors 1k 1/4 watt […]