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▼ 2012 (14)
- ▼ May (14)

Bio-Medical Circuits

Posted on Friday, May 25, 2012 by bharadwaj

CLICK BELOW LINKS TO OPEN CIRCUITS:

DS1621 pc thermometer
Electronic Stethoscope
The ESP SIM (Sound Impairment Monitor)
BIOMEDICAL MONITORING SYSTEM (AT89C2051 + TX/RX)

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List of Miscellaneous Circuits

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Flashing Neons (NE-51 / NE-2)
Sequencing Neons (NE-51 / NE-2)
Touch Activated Light
Game Show Indicator Lights (Who's First)
Salt Water Battery
Transistor Schmitt Trigger Oscillator
Car parking system using Microcontroller
Electronic House
Automatic Railway Gate Control
Intelligent Train Engines
Water level indicator and controller
THE SUDOKU SOLVER
Automatic Railway Grade Crossing Flashers
Joy Stick Controlled - Modernized "Toy" Throttle
Laser Pointer Train Detector
Automatic Station Stop Circuit
Plant Watering Watcher - Version II
Water-Level Controller
Staircase Light With Auto Switch-Off
Fire Alarm Using Thermistor
Mobile Cellphone Charger
DIGITAL ENGINE TACHOMETER
Centronics port D/A converters and low-pass filter
Plant Moisture Meter
Room Noise Detector
Heating System Thermostat
Cellular Phone calling Detector
Temperature-controlled Fan
Temperature-controlled 12V dc Fan
Digital Step-Km Counter
Bicycle back Safety Light
Whistle Responder
Jogging Timer
Automatic plant Irrigation (AT89C2051)
Prepaid Energy Meter
Traffic Light Controller
BASEMENT DOORBELL BEEPER
Birdie Doorbell Ringer
Ding-Dong Bell
Door Chime
Doorbell for the Deaf
Electronic Doorbell with Counter
Electronic Canary (Doorbell)
Fix Adds Door-Chime Repeater
Multi-Switch Doorbell with Indicators
Remote Doorbell Warning Switch
Self-Powered Door-Bell Watcher
Two Tone Generator
Frost Alarm
Dark Activated Switch
Electronic Keypad
Light Detector Circuit
DC Motor Control Circuit
PBS Switch Debouncing Circuit
Remote Doorbell Warning Switch
Electronic Doorbell with Counter
Digital Combination Lock
Electronic Night Light
Sound Operated Switch
Voltage Comparator Switch
DC Motor Reversing Circuit
Voltage Controlled Switch using 555 Timer
Keypad Switch No.2
Electronic Door Release
Intelligent switch
Heat-Sensitive Switch
Washing Machine Motor Controller
Voltage-Based Controller For Switches
Automated Traffic Signal Controller
Automatic Switch For Audio Power Amplifier
Automatic Headlight Brightness Switch
Load Sensing Auto Switch
Solid State Switch for DC Operated Gadgets

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List of Motor Circuits

CLICK BELOW LINKS TO OPEN CIRCUITS:

AC Motor Speed Controller
Pulse Width Modulation DC Motor Control
Simple Servo Controller
Simple Two Speed Contactor DC Motor Controller
Stepper Motor Controller
DC motor speed controller
Stepper Motor controller (2)
Auto Control of three phase Induction motor (AT89S52)

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List of Power Supply Circuits

CLICK BELOW LINKS TO OPEN CIRCUITS:

12VDC To 120VAC Inverter
Automatic Load Sensing Power Switch
Car Battery Charger
Dual Polarity Power Supply
Fixed Voltage Power Supply
High Current Power Supply
High Voltage High Current Power Supply
Power Supply
Machine power loss beepter (PDF)
DC/AC inverter
Variable Dual Lab Power Supply
12v "high" or "low" battery monitor
Electric power controller
Live-line Detector
AC Current Monitor

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List of Timer Circuits

CLICK BELOW LINKS TO OPEN CIRCUITS:

Basic 555 Monostable
5 to 30 Minute Timer
Periodic Timer
Asymmetric Timer
24 Hour Timer
555 Pulse Generator
Repeating Interval Timer
Repeating Timer No.2
LM555 Timers - Circuits and Calculators
Long delay Timer
Hands Off
Bike Light Flasher
Headlight Flasher

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List of OP-AMP Circuits

CLICK BELOW LINKS TO OPEN CIRCUITS:

Op-Amp Basics
2nd Order Opamp Filters
Bandpass Filter (Single Op-Amp)
Low Power Op-Amp - Audio Amp (Intercom)
Op Amp Radio

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List of Relay Circuits

CLICK BELOW LINKS TO OPEN CIRCUITS:

Relay Toggle Circuit Using a 555 Timer
Relay Toggle Circuit Using a Single Transistor and Push Button
Relay Toggle Circuit Using a MOSFET and Push Button
555 Timer Monostable Circuit Using Pushbutton
Light Activated Relay (toggled)
Photo Electric Street Light
Power-On Time Delay Relay Circuit
Power-Off Time Delay Relay Circuit
Electronic Thermostat Relay Circuit
CHARGE COUPLED BI-DIRECTIONAL POWER MOSFET RELAY
SOLID STATE RELAY REQUIRES ONLY 50uA DRIVE CURRENT
THROUGH GLASS PUSHBUTTON SWITCH
Ultra Low Power Latching Relay Circuit
Universal Flasher using Latching Relay
Water Activated Relay
Time Delay Relay
Time Delay Relay II
Temperature-controlled Fan
Bedside Lamp Timer
Clap Relay
Water Pump Relay Control

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