Amplifiers, Beeper & Buzzer, Equalizers, Intercom Circuits, Microphone Circuits, Mixers, Musical Circuits, Preamplifiers, Stereo Circuits, Tone-Balance, Ultrasonic Circuits, Vacuum Tubes

Delay Circuits, Direction Finder, Motor Control Circuits, Relay Circuits, Remote Control, Robotics, Servo Circuits, Stepper Motor

Audio, Lighting, Parking Aids, Various Circuits

Interfaces, Memory Circuits, Modem Circuits, Programmers, Various Circuits

Current to Voltage, Frequency to Voltage, Period to Voltage, RF, Sine to Square Wave, Voltage to Current, Voltage to Frequency

Analog to Digital, Data Bus Circuits, Data Logging, Decoder Circuits, Digital to Analog, Logic Circuits, Readouts

Inside Circuits

Light-Laser-LED

Display Circuits, Fluorescent Circuits, Infrared, Laser circuits, LCD circuits, Led circuits, Light Dimmers, Light Sensing, Xenon Circuits

Clock Circuits, Counters, Delay Circuits, Meters, Thermometer Circuits, Timer Circuits, Various Circuits, Voltmeters, VU Meters

Microcontrollers

68HC11, 8051 and 8052, AT89C2051/4051, AVR, PIC, Various Circuits

Astable, Audio, Colpits, Crystal, Hartley, Monostable Circuits, Pierce, RF, Sine wave, Square wave, Volt controlled, Wein Bridge

Buffer Circuits, Doorbell Circuits, Game Circuits, H-Bridge Circuits, Keypad Circuits, Model Circuits, Mosfet Circuits, Radar Circuits, Switch Circuits, Triac Circuits

AC/DC - DC/DC, Chargers, Current Limiting, High Voltage, Mirco-Power Circuits, Power Control, Solar Cell Circuits, Switch Mode, Tesla Circuits

AM Circuits, Amplifiers, Antennas, FM Circuits, FM Transmitters, PLL Circuits, Receivers, Transceiver Circuits, Transmitters, UHF Circuits, VHF Circuits

Alarms, Lock Circuits, Siren Circuits, Surveillance, Various Circuits

Sensors/Detectors

Air-Gas, Hall Effect, Human, Light, Liquid, Magnetic circuits, Medical, Metal Detector circuits, Optical, RF & Radiation, Various Circuits, Voltage

Circuit Analysis, Design Tools, PCB CAD Software

Bugs, DTMF Circuits, Ringers, Various Circuits

Amplifiers, Camera Circuits, Photo Flash, Television, Mixers, Video Wall circuits, Varius-Circuits

Converters

100s of converter circuits for every hobbyist, technician, student, and design professional. An nice reference tool which includes lots of converters. look at these circuit ideas, some of them may need some modification if they are to work as advertised. Ideas along with pretty good descriptions for each circuit.

Subcategories

Current to Voltage

Frequency to Voltage

Period to Voltage

Sine to Square Wave

Voltage to Current

Voltage to Frequency

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