KUMAR@PROJECTS-2

• A Scenix (and PIC) Programmer
   
• Acceleration monitor using ADXL202 and AVR
   
• ADC conversion using ADC0804LCN and 8051
   
• AFSK 1200 Modem based on PIC16C620
   
• 'Almost No Parts' 7-segments 12/24 Hours LED clock with PIC 16F84A or 16F628A
   
• Analog datalogger based on T89C51RD2
   
• Analog to digital (ADC) conversion notes
   
• Arduino based controller interface for servo motors, stepper motors and DC motors
   
• Arduino microcontroller prototyping system
   
• Asynchronous 40-bit TTL CPU
   
• AT89C2051 Digital thermometer and clock
   
• AT89C2051 line-follower robot
   
• AT89C2051 Night light saver
   
• AT89C2051 real-time controller
   
• AT89C2051 serial COMs to LED driver
   
• AT89C2051/4051 Driving dot LED
   
• AT89C2051/4051 Easy-Downloader
   
• AT89C2051/4051connecting dumb terminal
   
• AT89C2051/4051scanning 7-segment display and keypad
   
• AT89C2051/4051stepper motor interface
   
• AT89C51/52/55 Easy-Downloader
   
• AT89Sxx Cheap and Simple Learning Board
   
• AT90S8515 experimenter board
   
• ATmega48 based Nixie Clock
   
• ATmega8 based TNC with GPS and WX support
   
• Atmel 8051 Flash Based-Microcontroller Programmer
   
• Atmel 89 Series Device Programmer
   
• Atmel 89C Series Flash Microcontroller Programmer
   
• Atmel 89C2051 In-Circuit Programmer Schematic
   
• Atmel 89C2051 prototype board
   
• Atmel 90s2313 based TNC
   
• Atmel AT90USB development board
   
• Atmel ATmega128 development board
   
• Atmel ATtiny26 development board
   
• Atmel AVR 90s2313 based POCSAG encoder (ZIP file)
   
• Atmel AVR and 8051 series ISP programmer
   
• Atmel Mega88 Dual Temperatur meter
   
• Atmel Mega88 Temperatur meter, Type K sensor, Heat set and regulator
   
• Atmel Microcontroller based Ultrasonic Ranger
   
• Automatic door opener with PIC12C508
   
• AVR STK200/STK300 ISP Dongle circuit diagram
   
• AVR Thermometer
   
• AVR-Based Serial Port IR Receiver
   
• AVR-Core V1.1 - DIP-like development board for ATmega128 processors (PDF)
   
• AVRlinx V1.1 - Development board for ATmega16, ATmega32 processors with data radio transceiver (PDF)
   
• AVRmini V2.0 - Development board for all AVR processors in 40-pin packages (PDF)
   
• AVRmini V3.1 - Development board supporting all AVR processors in 40-pin and 64-pin packages (PDF)
   
• AVRmini V4.0 - Development board with Ethernet/USB for 40-pin AVR processors (PDF)
   
• AVRmini8 V1.0 - Development board for ATmega8, ATmega44, ATmega88, ATmega168 processors (PDF)
   
• Basic Stamp based altimeter
   
• Build a PIC controlled DDS VFO, 0 to 6 MHz
   
• C-52 EVB Robot Controller
   
• CASIO datalogger system based around Microchip PIC microcontroller
   
• CF/IDE Adapter V1.0 - CompactFlash and IDE interface for your microcontroller
   
• Cheap Ultrasonic Range Finder based on PIC16F877A with a 8MHz crystal
   
• Circuits for interfacing microcontrollers to a wide number of real-word interfaces
   
• Complete Design for Giant 8-foot LCD Counter (Zip file)
   
• Connecting AT90S2313 with LCD display 2x16 char and 4x4 keypad
   
• Connecting LED to PIC Micro I/O pins (PDF)
   
• Cypress PSoC based digital wallet to record secret codes and passwords securely
   
• Darkroom timer using PIC16F84A
   
• Designing a 4-Channel A/D (ADC) converter with the PIC12C671
   
• Digital compass using PIC16F84
   
• Driving high-power loads with a microprocessor
   
• DS1820 Arbiter V2.00 Schematic
   
• Electronic distance meter based on Motorola 68HC908QY4
   
• Electronic irrigation controller based on PIC
   
• Electronic safety lock based on ATtiny26
   
• Ethernet shield for Arduino (Xport)
   
• EZ80 single board computer schematic (Z80)
   
• Fan timer based on Motorola 68HC908QT2
   
• Galvanic decoupling of I2C bus
   
• GPS / Datalogging shield for Arduino microcontroller
   
• GPS LCD Display Project
   
• Hardware Random Number Generator with an SX microcontroller
   
• Homebrew Basic Stamp project
   
• I2C LCD interface
   
• IDE interface to a Microchip PIC16F877 microcontroller
   
• In-Circuit PIC Loader (ISP programmer) over parallel port
   
• Interfacing DRAM to AT90S8515
   
• Interfacing EEPROM to a Basic Stamp
   
• Interfacing the MAX186 8 Channel ADC to the BSII
   
• Interfacing the MAX187 ADC to the BSII to measure voltages
   
• Interfacing the PIC16C508
   
• Isolated RS232 for PIC16F84
   
• JDM programmer
   
• Jupiter card programemr
   
• KD7LMO Micro Beacon (PIC18F252)
   
• LCD clock based on AVR Attiny2313
   
• LCD thermometer using PIC16F871
   
• LCD to PIC16C54 schematic
   
• LED 5x7 display using a PIC microcontroller
   
• Linuxstamp general purpose processor module based on Atmel AT91RM9200
   
• Long-period watchdog timer
   
• Low cost Atmel in-system programmer
   
• Mains clock controller using AT89C2051
   
• Microchip PIC ICD (in-circuit debugger)
   
• Microcontroller sensor and actuator interfaces
   
• Microprocessor RS-232 Reset
   
• Microprocessor using Xilinx FPGA
   
• MiniLOGGER V1.0
   
• MMC to PIC16F876 circuit diagram
   
• Motorola 68HC11 evaluation board
   
• Motorola 68K SBC (single board computer)
   
• MTK-85 8085 Microprocessor Training Kit
   
• Multi PIC Programmer 5 Ver.2
   
• Multi-chip programmer
   
• Multi-chip programmer for Microchip PIC microcontrollers
   
• Multi-chip programmer for PIC microcontrollers
   
• Multipurpose buffered PIC microcontroller development system
   
• Night light saver (PIC12C508)
   
• Nixie clock (PIC16F876)
   
• Parallel AVR programmer
   
• PC to microcontroller communications using power from the PC serial port
   
• PIC 18 programmer (PIC18F458, PIC18F452, PIC18C252, PIC16C745, PIC18F6620, PIC18F6720)
   
• PIC based packet radio encoder (PDF)
   
• PIC demo board
   
• PIC ICD
   
• PIC LCD and Keypad driver
   
• PIC Light Chaser using PIC16C84
   
• PIC micro LED projects
   
• PIC micro multiple servo motor interface
   
• PIC micro programmer
   
• PIC micro to ISA bus interface
   
• PIC microcontroller servo motor interface
   
• PIC Project #1 - RS232 to I2C Interface
   
• PIC Serial LCD project - An RS232 serial LCD interface using a standard HD44780 LCD
   
• PIC sonar (ultrasonic) range finding project with seven segment display using PIC micro
   
• PIC vacuum fluorescent display (VFD) interface
   
• PIC Web Server Schematic
   
• PIC12C508 Night-light saver
   
• PIC12C508 Phase Controller for 2kW heater (ZIP file)
   
• PIC12C509 Gym Timer (ZIP file)
   
• PIC12C509 logic gate replacement for nitrogen filler (ZIP file)
   
• PIC16 DemoKit3 with programmer and displays
   
• PIC16C505 IR / wireless remote control
   
• PIC16F628 controlled FLL (Frequency Locked Loop) VFO for HF (PDF)
   
• PIC16F84 Based Morse Code Reader
   
• PIC16F84 CW decoder (PDF)
   
• PIC16F84 debugging terminal
   
• PIC16F84 LED chaser
   
• PIC16F84 line following robot
   
• PIC16F84 miniature real-time controller
   
• PIC16F84 programmer
   
• PIC16F84 pulse monitor with date/time output (ZIP)
   
• PIC16F84 Serial I/O-expander with PicBasic
   
• PIC16F84 tone generator
   
• PIC16F84 tone generator (6-Bit)
   
• PIC16F84 tone generator with source code
   
• PIC16F84 TRIAC / IGBT brightness phase controller
   
• PIC16F876 Datalogger
   
• PIC16F877 Programmer And Development System
   
• PIC16F877 to IDE interface
   
• PIC18F2550 Project Board
   
• PICADC - a free, PIC based "intelligent" A/D converter
   
• PicCon - Hidden Radio Transmitter Controller
   
• PicoWeb V5.1 (AT90S8515) tiny web server
   
• PIC-Programmer 2
   
• PIC-Programmer 2 for PIC16C84 etc
   
• PIXpand - TI calculator to Playstation memory card interface
   
• POCSAG encoder/decoder (Zip file)
   
• Poor man's analog to digital converter (ADC) using a 2N222 transistor and a few passives (PDF)
   
• Programmer PIC16F84,12C50x and EEPROM 24Cxx
   
• PS/2 keyboard keystroke logger based on Atmel 89C2051
   
• RF remote control based on Basic Stamp
   
• Rotating Sprocket Wheel Generator (PIC16F84)
   
• RS232 interfaced DVM using a PIC12F675 including source code for CCS C Compiler
   
• RS-232 to TTL Translator
   
• RS485-like multi-drop bus with half duplex serial protocol
   
• ScanMate audio activated recorded
   
• Scriptable thermometer / thermometric controller based around a COP8-CCR9-PLC44 microcontroller
   
• Serial LCD controller using a PIC16F628
   
• Serial LCD Controller using Microchip PIC16F628
   
• Serial port I/O interface using AVR microcontroller
   
• Serial to parallel converter using the AT89C2051
   
• Serial-based PIC16F84 Programmer For Windows 95/98/NT/2000/ME/XP
   
• Ser-Key 10-Key Serial Keypad Encoder
   
• Several Atmel AVR programmer circuits
   
• Simple CW Keyer based on Atmel ATtiny 2313
   
• Simple QRSS callsign keyer based on an Atmega AVR programmed in C
   
• Simple RS232C Level Converter using Transistors
   
• Smart card programmer
   
• Solderless Breadboard Arduino Clone for Arduino prototyping
   
• Speech recognition using HM2007
   
• SPI Flash Microcontroller Programmer
   
• SPI2CF, a fast and efficient WLAN interface for the AVR
   
• T89V51CC01 Development board
   
• Tachometer Measures Very Low Frequencies (PIC16F872)
   
• Talking PIC - based on SP0256
   
• TekBots universal device programmer with USB interface
   
• Temperature controlled based on AT89CX051
   
• Temperature monitor/controller: AVR 2313 / DS1621
   
• Tiny 2313 Project Development Board
   
• Tiny Eprom Simulator
   
• Tony Nixons Pocket Programmer (PIC)
   
• Touch senstor based on Atmel AT90S2313
   
• TTL to RS232 adapter using 2N3906 / 2N3904 transistors
   
• Ultra low-cost programmer for AT90S family
   
• Ultrasonic Distance Measurement With the MSP430 (PDF)
   
• Ultrasonic Distance Measurer based on Freescale MC9RS08KA2 (PDF)
   
• USB and GLCD expansion board for 8051 SBC
   
• USBmini V1.0 - Generic USB Full-speed interface board (PDF)
   
• USBtinyISP - AVR programmer & SPI interface project
   
• Using the AT89C4051 as a RTC (real-time clock)
   
• Variety of circuits for RS232 to TTL Signal Conversion
   
• Variety of circuits for TTL to RS232 Signal Conversion
   
• Victoria TAFE programmer (based on AT89C2051)
   
• Wave (Audio) shield for Arduino microcontroller
   
• Wireless communications using a Basic Stamp and low-cost wireless data modules
   
• Wisp628 ISP Microchip PIC Programmer
   
• WLoader - PIC16F877 application loader / bootloader
   

Misc audio (also see Music, Amplifiers, Preamp)

• 1 Watt audio amp using a TDA7052
   
• 12 watt audio amplifier with tone using TDA1020
   
• 3 Channel Spectrum Analyzer
   
• 3-Band audio graphic equalizer
   
• 4 channel audio selector
   
• 5 watt audio amplifier using TDA1010
   
• 6-Input mixer
   
• Active Sub-Woofer and Controller
   
• Actvie speaker based on a dual op-amp (LM833) and TDA2030 power amp
   
• Amplifier thermal protection
   
• An Audio Limiter for NBFM use
   
• An Audio-Noise-Based Voting Circuit
   
• Analog Synth Keyboard Schematic
   
• Assortment of Siren Circuits
   
• Audio DAC3 (SPDIF->Analog Audio)
   
• Audio Detector Circuit
   
• Audio graphic equaliser
   
• Audio Indicator - monitor a loudspeaker, alarm, or audio source for presence of an audio waveform
   
• Audio line isolator
   
• Audio mixer
   
• Audio Signal Source
   
• Audio Speech Processor
   
• Audio VU Meter based on pair of LM324 quad opamps
   
• Automatic Charger for Battery Operated Hi-Fi Preamps
   
• Automatic loudness control
   
• Balanced Line Driver & Receiver
   
• Base / treble control circuit using LM1036N
   
• Bass booster using a TL702 opamp
   
• Bass EQ pre-amp correction for high impedance ceramic crystal pickup
   
• Beat Tracking Strobe
   
• Big Ben sound effects generator
   
• Bridging Adapter For Power Amplifiers
   
• Clack Clack Electronic Bell
   
• CMOS IC 1 kHz Audio Oscillator
   
• Condenser microphone hookup
   
• Cuckoo sound generator
   
• Cuckoo sound Generator
   
• Digital Delay Unit For Surround Sound
   
• Digital noise generator (PDF)
   
• Digital volume control
   
• Digital volume control
   
• Digital Volume Control based around CD4067 CMOS chips
   
• Digital Volume Control using DS1669 Digital Pot IC
   
• Digital Volume Control using DS1669
   
• Direct Injection Box for Recording & PA Systems
   
• Doorphone intercom
   
• Dual Voltage Controlled Oscillator w/Modulator
   
• Dynamic microphone to electret microphone input
   
• Electret microphone powering circuits
   
• Electronic attenuator
   
• Electronic Canary
   
• Electronic canary sound effects
   
• Electronic siren
   
• Envelope generator ADSR
   
• Fast Audio Peak Limiter
   
• FET Audio Mixer
   
• FET audio mixer
   
• Guitar Reverb Effect Version 2
  

• Improved PL tone decoder
   
• ISD4002-120 audio recording circuit
   
• JFET Bass Preamp
   
• Line level signal to microphone input adapter
   
• Linkwitz Cosine Burst Generator
   
• LM358 preamp
   
• Load Sensing Automatic Switch
   
• Loudspeaker Protection and Muting
   
• Low frequency / audio frequency dB output meter
   
• Low Noise Balanced Microphone Preamp
   
• Low Noise Microphone Preamplifier
   
• Magnetic cartridge amplifier
   
• Microphone Mixer
   
• Microphone mixer
   
• Microphone phantom power supply
   
• Minimalist Discrete Hi-Fi Preamp
   
• Minimum Theremin Kit Schematic
   
• Mono To Stereo Synthesizer / Simulator
   
• MS Stereo Decoder
   
• Musical Electronic Bell
   
• Novel buzzer using a relay and transformer
   
• Panner Waveform Generator
   
• Parabolic microphone project circuit (can be used with shotgun directional microphone also)
   
• Paradoxical Sound Syntheizer
   
• Parametric And Sub-Woofer Equaliser
   
• Peak reading audio level meter using CA3140 opamp
   
• Peak-reading meters
   
• Phase shifter
   
• Phono Preamps For All
   
• Police Siren
   
• Power Amplifier Clipping Indicator
   
• Precision Audio Millivoltmeter
   
• RC Audio Oscillator
   
• RDS Encoder
   
• Regulatable audio amplifier using a 741opamp
   
• RIAA Equalized Stereo Phono Preamp
   
• Room noise detector
   
• Room Noise Detector
   
• Signal Detecting Auto Power-On Unit
   
• Simple electronic buzzer
   
• Simple Surround Sound Decoder
   
• Simple two line output combiner
   
• Simplest Ever Amplifier Bridging
   
• Six-channel Mixer and Amplifier
   
• Sound activated relay, V1
   
• Sound activated relay, V2
   
• Sound detector
   
• Sound Level Meter
   
• Sound level meter
   
• Sound operated switch
   
• Sound Pressure Level Meter
   
• Speaker cabinet simulator - professional-quality frequency response in a DIY-friendly circuit
   
• Speaker Microphone Circuit
   
• Speaker signals to line level inputs
   
• Speech recorded using ISD2560
   
• Spring reverb unit
   
• Stereo Audio Isolator
   
• Stereo Audio Isolator
   
• Stereo audio line driver for running audio over long distance cables
   
• Stereo LED VU meter using discrete components (BC547 transistors)
   
• Stereo Width Controllers
   
• Subwoofer Equaliser
   
• Subwoofer Filter, Gainer, Auto Power System
   
• Telephone ring sound simulator using SMT (surface mount technology)
   
• Three channel audio spectrum analyzer
   
• Three channel audio spectrum analyzer
   
• Three-Level Audio Power Indicator
   
• Tone control circuit diagram
   
• Tone control circuit schematic
   
• Tone Control using TDA1524A Tone Control IC
   
• Tone detector circuit diagram
   
• Tone display system
   
• Tone generator circuit diagram
   
• Two Tone Audio Oscillator
   
• Underwater microphone used in a home aquarium to monitor fish sounds
   
• Use amplifier phono input as line level input
   
• Using a speaker as a microphone - impedance matching circuit
   
• Variable Amplifier Impedance
   
• Various tube crossover circuits
   
• Very loud beeper (PDF)
   
• Voice / Audio Record / Playback Circuit
   
• Voice Message Recorder / Player (uses an obsolete voice recorder chip)
   
• Voice Scrambler
   
• Voice-Over Circuit
   
• Voltage controlled amplifier
   
• Voltage Controlled Panner
   
• Voltage Controlled Panner
   
• Voltage Controlled Panner
   
• VU And PPM Audio Metering
   
• Warbler siren circuit diagram
   
• Weird Sound Generator
   

Miscellaneous schematics

• 10 GHz CW Radar based on a X-band Gunnplexer
   
• 12 Volt Toilet Tank Refiller
   
• 1uS light pulse descriminator plus F to V converter (PDF)
   
• 1uS light pulse receiver plus post amp (MISC)
   
• 2D3 Nixie clock schematic using Atmel microcontroller
   
• 6 Pole ElectroMagnet Motor (aka Simple Brushless motor)
   
• 741 Light Sensor
   
• A small collection of quick to build electronic circuit designs
   
• A Two-Way Morse Practice Set
   
• Air flow detector
   
• Air flow detector using an incandescent lamp to detect airflow
   
• Amateur weather station to APRS interface ALWXI-01
   
• Analog computer
   
• Analog opto-isolator
   
• Analog pulse counter
   
• APRS system for GPS tracking
   
• Assorted digital circuits
   
• Aurora Alarm: Automated Detection System for the Northern Lights
   
• Barry's Coilgun Mark I circuit diagrams
   
• Barry's Coilgun Mark II circuit diagrans
   
• Barry's Coilgun Mark III circuit diagrans
   
• Barry's Coilgun Mark IV circuit diagrans
   
• Barry's magnetic levitation project
   
• Basement doorbell beeper (PDF)
   
• Basic Homebuilt Discrete DTL gate circuits (Diode Transistor Logic)
   
• Basic opamp circuits
   
• Bat detector
   
• BayComm packet modem
   
• Beat Balance Metal Detector
   
• Biasing Op-Amps into Class A
   
• Big Ear Stereo Parabolic Microphone
   
• Black Light
   
• Bleeper box for time reference
   
• Broadband 2MHz optical fiber receiver (PDF)
   
• Broadband 5MHz optical fiber receiver (PDF)
   
• Build logic gates using discrete parts
   

Build your own UFO Bino-Scope unit - upgrade binoculars to become a photosensitive bino-scope

High Quality Sound Mixer