Categories__ Circuit designed by David A. Johnson, P.E.

Circuits designed by David Johnson, P.E.
Last Updated on: Sunday, December 31, 2017 10:42 AM

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Amplifiers:
   Audio
   Buffers
   High Frequency
   High Impedance
   High Speed
   Infrared
   Low Noise
   Operational
   Power
   Radio Frequency
Transimpedance
   Variable Gain
   Video
   Wide Band

Airplane Models
Alarms
Antenna
Annunciator
Astable Oscillator
Audio Amplifiers
Audio Oscillator
Automotive

Battery Chargers
Battery Monitors / Tester
Beepers & Buzzers
Bistable Multivibrator
Blinkers & Flashers
Bridge
Buffer Amplifiers
Burglar

Camera
Capacitance Touch Switch
Capacitance Sensors
Charge Pump
Clocks
Comparator
Computer Interface
Control
Constant Current
Counters & Timers

AC Power Control
AC to AC Converters
AC to AC Power Supply
AC to DC Power Supply

Active Filters

Acquisition / Data Logging
Acoustic

Converters:
AC to AC
AC to DC
Current to Voltage
DC to AC
DC to DC
Frequency to Voltage
Period to Voltage
Sine-Square Wave
Switchmode
Voltage to Current
Voltage to Frequency

Capacitance Sensors
Capacitance Switches
Clocks
Comparators
Computer Interface
Control
Constant Current
Current to Voltage Converters
Current Loop
Current Monitors
Current Source
Crystal Oscillators

Data Logging / Acquisition
DC to DC Power Supplies
Delay
Digital
Driver
Discriminator
Display
Doorbell

FET
Fiber Optic
Flame Sensor
Flashers & Blinkers
Flip / Flop
Fluid Level Detectors
Fluorescent Light
Flyback
Freespace Communication
Freezer / Frost Alarm
Frequency Counters / Dividers
Frequency to Voltage Converters

Energy Harvesting

Gadgets
Geophones

H-Bridge
High Frequency Amplifiers
High Impedance Amplifier
High Speed Amplifiers
High Voltage Power Supplies
Hour Meter
Human Motion Monitors
Human Touch Sensors

Ideal Diodes
Indicator
Infrared
Infrared Amplifiers
Inverters

Lamp / Lighting Controls
Laser
Latch
LED (Light Emitting Diode)
Light Beam Communication
Light Dependent Resistors
Light Detectors
Light Flashers & Blinkers
Limiter
Logarithmic
Low Noise Amplifiers

Medical
Microphone
Micro Power
Models-Airplanes & Trains
Moisture Sensors
Monostable
MOSFET
Motion Detectors
Motor Controls
Multivibrator
Musical

Noise Generators

One Shot
Optic
Opto-Couplers
Opto-Isolator

Oscillators:
   Astable
   Audio
   Crystal
   Radio Frequency
   Sine Wave
   Square Wave
   Triangle Wave
   Voltage Controlled

Over Temperature Monitors

PWM
Passive Filters
Peak Detectors
Pedometers
Period to Voltage Converters
Pink Noise Generation
Piezoelectric
Photography
Photo Flash
Potentiometer
Power Control
Power Failure
Power Line

Power Supplies:
AC to AC
AC to DC
DC to AC
DC to DC
High Voltage
Switchmode
Variable

Probes
Protection
Proximity Sensor
Pulse Generation
Pulse Width Modulators
Push Pull

RFID
Receiver
Rectifier
Regulators
Relay
Remote Control
Repeaters
Resistance Meters
RF Amplifiers
RF Detectors
RF Oscillators

SCR
Safety/Protection
Schmidt Trigger
Security
Seismic
Servo
Sirens

Sensors/Detectors:
   Automotive Related
   Capacitance
   Current Monitors
   Flow Detectors
   Human Motion
   Light
   Liquid/Fluids
   Motion Detectors
   Optical
   Peak Detectors
   Pressure Detectors
   Resistance Meters
   Seismic (Geophones)
   Snow Sensors
   Temperature
   Vibration Monitors
   Voltage Detectors
   Water / Moisture

Signal Generators
Silicon Controlled Rectifier
Sine Wave Oscillators
Sine to Square Wave Converter
Solar Energy
Solid State Relay
Sound Operated
Solar Cells / Panels
Sound Synthesizer
Strobe Lights
Square Wave Oscillators
Switches
Switches, Capacitance (touch)
Switch Mode Power Supplies
Synchronous Circuits

Telephone
Television
Temperature Alarms
Temperature Controls
Temperature Sensors/Monitors
Tester
Timers & Counters
Touch Switch
Traffic Counter
Train Models
Transformer
Transimpedance Amplifiers
Transistor
Transmitter
Thermistor
Thermocoupler
Triangle Wave Generators
TV Remote Control

Ultrasonic
Ultrasound
Under Voltage Monitors

VCO
Variable Power Supplies
Vibration Monitors
Video Amplifiers
Voltage Controlled Oscillators
Voltage Detectors & Monitors
Voltage Regulators
Voltage-Current Converters
Voltage-Frequency Converters

Water Level Sensors
Water Sensors
Watt Hour Meters
Waveform Generator
Wave Shaping
Weather Instruments
Wide Band Amplifiers
White LED
White Noise Generation
Wireless Telephones

Xenon Lamps
Zero Cross Detectors

List of Dave's Circuits
Dave's Circuits with Descriptions
Dave's Circuits by Category

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