• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Circuit Ideas for You

Get free circuit ideas online.

  • Home
  • Privacy Policy
  • About

Transistor Circuits

Home » Transistor Circuits » Page 5

Simplest Automatic Battery Charger Circuit using One Transistor

Last updated on 24 August 2024 by Admin-Lavi Leave a Comment

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 […]

Filed Under: Battery Charger Circuits, Transistor Circuits

Transistor 2N3055 Circuit with 1.5 Million High Gain

Last updated on 24 August 2024 by Admin-Lavi Leave a Comment

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 […]

Filed Under: Transistor Circuits

Simple Adjustable Zener Diode Circuit

Last updated on 20 June 2025 by Admin-Lavi Leave a Comment

Think like small switch which controls how much voltage go through. Normal Zener diode is like one fixed switch which let electricity pass only when voltage goes above certain level. But this Simple Adjustable Zener Diode Circuit is like fancy dimmer switch. We can change voltage level using some parts like mostly one thing called […]

Filed Under: Transistor Circuits

Simple Heat Sensor Circuit using a Single Transistor

Last updated on 18 June 2025 by Admin-Lavi Leave a Comment

This Simple Heat Sensor Circuit uses only one transistor and one special resistor like thermometer. When it get hot this resistor changes to how it work because of which the transistor sees this change. Transistor work like door and if temperature changes it opens or closes for electric. So the circuit can detect when something […]

Filed Under: Sensors and Detectors, Transistor Circuits

Simple Low Battery Indicator Circuit using Two Transistors

Last updated on 11 June 2025 by Admin-Lavi Leave a Comment

This article discusses how to construct a small assistance circuit for the battery powered devices. When the battery is running low it uses only a few components including two transistors to light up an LED. In this way it will be able decide when to change the battery before the device goes out. Circuit Diagram: […]

Filed Under: Indicator Circuits, Transistor Circuits

Simple 300 Watt Power Amplifier Circuit using Transistors

Last updated on 8 June 2025 by Admin-Lavi Leave a Comment

Calling all music lovers who want their speakers to sound REALLY loud! This article shows how to build a super powerful amplifier circuit that can pump out 300 watts of sound with 8 ohm speakers or even more with 4 ohm speakers. Building circuits with high voltage can be dangerous. If possible experiment this circuit […]

Filed Under: Amplifier Circuits, Transistor Circuits

  • « Go to Previous Page
  • Page 1
  • Interim pages omitted …
  • Page 3
  • Page 4
  • Page 5
  • Page 6
  • Page 7
  • Interim pages omitted …
  • Page 10
  • Go to Next Page »

Primary Sidebar




Categories

  • Alarm Circuits (30)
  • Amplifier Circuits (67)
  • Arduino Projects (29)
  • Audio Circuits (93)
  • Automobile Circuits (19)
  • Battery Charger Circuits (48)
  • Free Energy (13)
  • Heater and Temperature Controllers (9)
  • Indicator Circuits (38)
  • Inverter Circuits (13)
  • LDR Circuits (13)
  • LED and Lamps (111)
  • Meters and Testers (27)
  • Motor Controllers (18)
  • Oscillator Circuits (32)
  • Power Supply Circuits (91)
  • Remote Control Circuits (6)
  • Security and Protection (23)
  • Sensors and Detectors (71)
  • Solar Circuits (16)
  • Timer Circuits (27)
  • Transistor Circuits (56)
  • Transmitter Circuit (12)
  • Tutorials (4)
  • Water Level Controller (4)

Copyright © 2025 | New Circuit Ideas