Simple BFO circuit is small electronic circuit which make signal sound when mix with other signal; also this circuit help to hear weak radio signal like in old radio or metal detector. Moreover, it is easy to build and uses one transistor part called a bipolar junction transistor (BJT). What is Beat Frequency Oscillator: BFOs […]
Mini Projects
Simple Adjustable Oscillator Circuit using Two Transistors
To begin with, this article for Simple Adjustable Oscillator Circuit using Two Transistors show how to make small sound circuit using only two transistors! Hence, when we turn the knob the sound goes high like beep or low like growl, also we can use four AA battery or small wall power to run this circuit. […]
Simple Car Fused Tail Lamp Indicator Circuit
Simple Car Fused Tail Lamp Indicator Circuit tell how to make one easy circuit for checking car back lights are ON or not. Also, it uses one common part called resistor to know if light are getting enough power and if light goes OFF the circuit gives an alarm to show problem. Moreover, this thing […]
Simple Delay Timer Circuit
This article tell how to use simple parts like transistor, capacitor and diode to make Simple Delay Timer Circuit. Also, this timer can wait some time like few seconds or minutes before turning something ON. Hence, many circuits need this kind of delay timer to ensure operations happen in the correct order. What is a […]
Simple Hum Free Regulator Power Supply Circuit
This Simple Hum Free Regulator Power Supply Circuit uses one common transistor 2N3055 to make power supply clean and stable; also it stops unwanted noise like hum sound which sometimes come from power supply. What is a Hum Free Regulator Power Supply: A Hum Free Regulator Power Supply circuit reduces or removes hum noise that […]
Simple Adjustable Power Supply Circuit using Two Transistors
This Simple Adjustable Power Supply Circuit using Two Transistors is a simple power supply circuit, which can change the output voltage by using two transistors like BD140 and MJ2955 to control the voltage. What is a Adjustable Power Supply Circuit: Adjustable power supply circuit is an electric circuit which uses two transistors to change and […]