Transistors are tiny electronic switches, but how do you know if yours are working or which kind they are? This tester circuit is like a fortune teller for transistors. It is a simple DIY project that uses just a few common parts to check if your transistor is alive and tell you if it is […]
Transistor Circuits
Simplest Two Transistors Amplifier Circuit using 1.5V Battery
This circuit is like a megaphone for tiny sounds. It uses just two transistors like tiny electronic switches and a 1.5V battery to boost a faint signal making it much louder. This is a basic way to build a mini amplifier for simple projects, like listening to music a little bit better. Circuit Working: Parts […]
Simplest Automatic Battery Charger Circuit using One Transistor
There is a super basic way to build an automatic battery charger using just a few parts. This circuit is like a simple machine for charging batteries by itself. It uses only a transistor a resistor and an LED. It is great for charging things like 9V batteries and even has a light to show […]
Transistor 2N3055 Circuit with 1.5 Million High Gain
The 2N3055 transistor is like a normal volume knob, it can only turn things up so loud. To get super loud like 1.5 million you need to trick it. One way is to use two transistors together like a double volume knob darlington pair. You can even stack more of these double knobs for even […]
Simple Adjustable Zener Diode Circuit
Imagine a tiny switch that controls voltage. A regular zener diode is like a fixed switch it only lets electricity flow past a certain voltage level. An adjustable zener diode circuit is like a fancy dimmer switch for voltage. It uses special parts often a potentiometer to change the voltage level that the switch allows […]
Simple Heat Sensor Circuit using a Single Transistor
This simple heat sensor circuit uses just one transistor and a special resistor that acts like a thermometer. As things heat up, this resistor changes its behavior, which the transistor picks up on. Depending on the temperature, the transistor acts like a gatekeeper letting electricity flow through or blocking it completely. This way, the circuit […]