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 […]
Simple FM Microphone Transmitter Circuit
FM mic transmitter is small device. It changes sound from mic into radio signal. FM radio can hear it in short distance. This Simple FM Microphone Transmitter Circuit uses one NPN BC547 transistor. Even it is small it can send FM signal pretty far. Circuit Working: Parts List: Category Description Quantity Resistors 330Ω 1/4 watt […]
How to Design Crystal Oscillator Circuit
To design Design Crystal Oscillator Circuit need know some basic things. Use crystal to make steady frequency. Choose right crystal and connect with other parts like resistor and capacitor. Be sure circuit give right signal for our device. Easy steps help us build good working circuit. Circuit Working: Let us learn about this circuit with […]