Do It Yourself Projects #3

Here are some of the "Best of the Best" Projects and "How-To" Pages I've wandered upon in my treks across the Net.

Air flow detector

Strain gauge sensor

Digital Water Wave/Tide/Level Meter (PIC16F876)

Self made data-logger V2.5 (second edition)

Magnetometer

Analog input section based on AD9220

uModem 4+4/8 channel A/D board

ADXL202 accelerometer to CV output

Light direction sensor

12-Bit ADC interface

Digital thermometer

Universal flight controllers / datalogger

Rain detector

Home Brew Compass Sensor

Using 555 Timer as an A/D converter

ADC0804LCN 8-bit A/D converter

Web-based thermometer project

Low Flow-Rate Thermal Flowmeter

Geiger counter

Differential Capacitance Measurement for Tilt Meter

Honey Bee counter (PDF)

Capacitance type liquid level measurement (PDF)

Thermostat node schematic

Digital PC Oscilloscope

Ultrasonic Range & Imager

Precision Digital Altimeter

Digital compass schematic

Temperature datalogger

Serial Port A/D-converter

Centronics port D/A converters and low-pass filter

LCD Thermometer

Acceleration monitor using Analog Devices ADXL202

Optical sensor using PIC12C508

Wireless Liquid Level Sensing for Restaurant Applications

Accelerometer Schematic

Pressure Sensor-Based Altimeter Circuit

Ultrasonic range finder circuit

1-wire barometer

Water-level sensor

Addressable ADC

Electronic altimeter using PIC16F877

Wireless weater station

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Infrared

IR detector

Infrared body heat detector

Stereo IR audio receiver

General purpose IR receiver

Wireless IR headphone transmitter

Wireless IR headphone receiver

Infrared remote control shutter release system

Infrared transmitter for locomotives

Infrared gate for door

Infrared circuits for remote control

Serial port controller infrared transmitter (PIC16F628)

IR Receiver (Amplitude Modulated IR)

IR Transmitter for Audio (Amplitude Modulated IR)

Digibox interface

IR remote control

Long Range Infrared Remote

iRDA to TTL interface

40KHz light receiver (PDF)

40KHz TV-VCR repeater (PDF)

Micro based PIR to IR remote converter

IR-related ASCII Schematics V1.00

Infrared remote transponder

Build an Infrared night scope

Decoding IR Remote Controls

IR detector

PC IR Remote Control Hardware

PC IR Remote Control

An Ambient-Light-Ignoring Infrared Active Motion Detector

Infrared Transmitter and Receiver schematic diagrams

Pyroelectric Infrared Sensor

Minimal Infrared transmitter for PC

Simple IR transmitter circuit

Simple infra-red detector

AVR (AT90S2313) serial port infrared receiver

Infra Red Switch

IR remote control extender

IR Remote Control Extender Circuit (Mark 2)

IR Remote Control Extender Circuit (Mark 3)

IR Link

IR remote control tester

40khz IR Tester

555 timer 40khz IR Oscillator

IR detector / emitter

Fire-Stick infrared remote control

Simple infrared remote control

Infrared / Ultrasonic beacon

Implementing Infrared Object Detection

IR detector for robotics

Computerized Infrared Remote

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Laser

Light beam receiver for laser pistols

12V supply for He-Ne laser

Laser diode transmitter

Laser power supply

Laser transmitter/receiver

Laser harp

Laser Telephone Receiver Circuit

Fiber Optic Voice Communications

Efficient Laser Supply

20MHz VCSEL 3mW laser test circuit (PDF)

10MHz to 20MHz laser light detector (PDF)

Micro-power 40KHz burst laser diode driver (PDF)

40KHz laser burst detector (PDF)

Modulated laser diode tester (PDF)

Ar/Kr Ion Laser Power Supply

Laser diode power supply circuits

RS-232 Laser Transceiver

HeNe laser power supply

OPT201 Laser receiver

OPT301 Laser receiver

Laser transmitter schematics

Diode Laser Power Supplies

Laser bug circuit

RS-232 Laser Transceiver

Experimental laser data link

Ar/Kr Ion Laser Power Supply Design

Simple laser communicator

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Microcontroller

PIC based packet radio encoder (PDF)

RS485-Version of the SAB80C535-Microcontrollerboard

PC IR receiver based on PIC16F84

Record and play fast 1-bit sound on a PIC micro

AT89C2051/4051scanning 7-segment display and keypad

AT89C2051/4051 Driving dot LED

AT89C2051/4051stepper motor interface

AT89C2051/4051connecting dumb terminal

Motorola 68K SBC (single board computer)

8051 SBC (single board computer)

Simple RS232C Level Converter using Transistors

Motorola 68HC11 evaluation board

C-52 EVB Robot Controller

Mains clock controller using AT89C2051

AT89C2051/4051 Easy-Downloader

AT89C51/52/55 Easy-Downloader

PIC16F84 programmer

PIC16F84 miniature real-time controller

Isolated RS232 for PIC16F84

PIC16F84 debugging terminal

MiniLOGGER V1.0

Analog datalogger based on T89C51RD2

Atmel 89C Series Flash Microcontroller Programmer

Atmel 89C2051 prototype board

AT89C2051 real-time controller

PIC12C508 Night-light saver

AT89C2051 Night light saver

Atmel 8051 Flash Based-Microcontroller Programmer

AT89C2051 Digital thermometer and clock

4-Channel Timer using Atmel 89C4051 and MAX7219 display driver

PIC16F84 CW decoder (PDF)

12C508 Smart Lock

80C31 stepper motor controller

Build a PIC controlled DDS VFO, 0 to 6 MHz

PIC controlled DDS VFO, 0 to 6 MHz

Basic Stamp Lightning Activity Monitor

Parallel AVR programmer

PIC16F84 line following robot

PIC16C505 IR / wireless remote control

Automatic door opener with PIC12C508

RS485-like multi-drop bus with half duplex serial protocol

WWWpic2 - A web server in a PIC

PIC16F84 web server

50 MHz frequency counter, voltage meter & SWR/PWR indicator

Microcontroller board using the Atmel AVR AT90S8535

Programmer PIC16F84,12C50x and EEPROM 24Cxx

RDS Encoder - digital part

PIC programmer for serial port

Fully functional PS/2 mouse based on the PIC16F84

PIC 18 programmer (PIC18F458, PIC18F452, PIC18C252, PIC16C745, PIC18F6620, etc)

Foreign vocabulary recollector

Illuminate holiday destinations on a world map

Embedded system to send e-mails (small TCP/IP stack)

Speaking clock using PIC & ISD device

Speaking doorbell using PIC & ISD device

Whistle detector using 8-pin PIC

PIXpand

PIC16F877 to IDE interface

68HC11 stepper motor control

90S2313 AVR Robot Board

POCSAG encoder/decoder

Network Time Protocol AVR Clock

DS1820 Temperature Sensor Readout Unit

Rotating Sprocket Wheel Generator (PIC16F84)

Talking PIC - based on SP0256

Serial to parallel converter using the AT89C2051

AT89C2051 serial COMs to LED driver

PIC16F877 Programmer And Development System

DS1820 Arbiter V2.00 Schematic

Microchip PIC ICSP implementation

101 AT Keyboard to ASCII Decoder using 68HC705J1A MCU

LCD Serial Terminal

Propellor clock (PIC16F84)

Optical sensor using PIC12C508

Interfacing S-7800A to PIC16F877

A Scenix (and PIC) Programmer

MMC to PIC16F876 circuit diagram

8088 maximum mode SBC

EZ80 single board computer schematic (Z80)

8051 Development System Circuit Board

Voice recording and message retrieval system

Interfacing a GPS to an LCD using a Microcontroller

Long-period watchdog timer

PIC16F84 Range Finder Project

Generate video signals in real-time using a PIC16F84

PIC ICD

PIC Project #1 - RS232 to I2C Interface

Galvanic decoupling of I2C bus

Programmer PIC16F84,12C50x and EEPROM 24Cxx

Dual PIC16C84 prototype board

Graphic LCD interface

FSK modem with PIC16C84

Talking YODA project (PIC16C84)

PIC16F84/PIC16F87x-In-System-Programmer

Microcontroller interface for 5KW microwave oven

Using an I2C Serial EEPROM with a Basic Stamp 2

PIC16F84 Based Morse Code Reader

AVR-Based Serial Port IR Receiver

Interfacing piezo elements to a microcontroller

Victoria TAFE programmer (based on AT89C2051)

JDM programmer

PIC micro programmer

Speech recognition using HM2007

PIC microcontroller servo motor interface

PIC micro multiple servo motor interface

PIC16F84 countdown timer

PIC16F873 ultrasonic range meter

PIC16F873 Digital clock

PIC16F873 remote display

PIC16F84 stepper motor controller

Way small web server

PICADC - a free, PIC based "intelligent" A/D converter

8051 development system circuit board

8088 maximum mode single board computer (SBC)

Basic 89C2051 / 89C4051 circuit diagram

Debugging dump terminal for 89C2051 designs

Easy debugging terminal

Galvanic decoupling of I2C bus

Circuits interfacing piezo elements to a microcontroller

Driving a TRIAC using a PIC12C508

Isolated RS232C for PIC16F84

Microchip ICD (in-circuit debugger) circuit diagram

Microchip PIC ICSP implementation circuit diagram

Interfacing NMEA GPS to LCD using PIC16F84

PIC ICD (in-circuit debugger)

PIC16C71 morse code callsign generator

PIC16F84 to LCD interface

PIC16F84 I/O expander with PicBasic

Scanning 7-Segment & Keypad

10-key serial keypad encoder

Simple RS232C Level Converter using Transistors

Talking PIC microcontroller using SP0256

PIC-Programmer 2

Connecting PIC12C508 8 to 93AA46 serial eprom

KD7LMO Micro Beacon (PIC18F252)

GPS LCD Display Project

PIC16F84 LED chaser

PIC micro LED projects

PS/2 keyboard keystroke logger based on Atmel 89C2051

Electronic distance meter based on Motorola 68HC908QY4

Fan timer based on Motorola 68HC908QT2

Atmel AVR and 8051 series ISP programmer

AT89C2051 line-follower robot

Night light saver (PIC12C508)

USB and GLCD expansion board for 8051 SBC

Basic stamp interface circuits

Microcontroller sensor and actuator interfaces

Giant money counter (PIC16F876)

PIC12C509 logic gate replacement for nitrogen filler

PIC demo board

PIC12C509 Gym Timer

PIC LCD and Keypad driver

PIC12C508 Phase Controller for 2kW heater

PIC16F84 TRIAC / IGBT brightness phase controller

PIC16F84 pulse monitor with date/time output (ZIP)

Programmer for the 68HC705C8 MicroController

27c801 EPROM Programmer Project

LCD to PIC16C54 schematic

68HC11 based RDS decoder

Acceleration monitor using ADXL202 and AVR

40+ MHz 5-digit frequency counter with an AVR 2313

Interfacing DRAM to AT90S8515

Temperature monitor/controller: AVR 2313 / DS1621

PIC micro to ISA bus interface

PIC16C84 VT-52 Emulator for Linux

Microchip PIC ICD (in-circuit debugger)

Tony Nixons Pocket Programmer (PIC)

PicoWeb V5.1 (AT90S8515) tiny web server

Atmel 89C2051 In-Circuit Programmer Schematic

8051 Development System Circuit Board

8051 Development System Circuit Board

Microprocessor using Xilinx FPGA

Temperature controlled based on AT89CX051

I2C LCD interface

AFSK 1200 Modem based on PIC16C620

PicCon - Hidden Radio Transmitter Controller

PIC16F84 tone generator with source code

PIC16F84 tone generator

PIC16F84 tone generator (6-Bit)

AVR Beacon Super Keyer

AVR Frequency Counter

AVR Digital Voltmeter

AVR Signal Generator

Ser-Key 10-Key Serial Keypad Encoder

2-wire LCD interface using PIC16CF84

PIC16F84 Serial I/O-expander with PicBasic

RS 485-RPT Schematic

Camera remote control system using Basic Stamp

Low cost Atmel in-system programmer

Ultra low-cost programmer for AT90S family

AVR to USB interface

Programable LCD counter with memory backup based on Atmel AT90S1200A

Connecting AT90S2313 with LCD display 2x16 char and 4x4 keypad

Atmel AVR RCEN fuse bit programmer

Electronic safety lock based on ATtiny26

GSM SMS remote control using AVR microcontroller

128x64 LCD Driver for AT90S2313 (ZIP file)

Connecting LED to PIC Micro I/O pins (PDF)

Microprocessor RS-232 Reset

AT90S8515 experimenter board

Multi-chip programmer for PIC microcontrollers

Buffered PIC chip interface

A PIC-Based Keyboard Emulator

PIC-based robot

ScanMate audio activated recorded

PIC vacuum fluorescent display interface

PIC18F252 bootloader schematics

PIC16F876 Datalogger

GPS Repeater

Kodak DC-20 camera interface (PIC12C509)

Kodak DC-20 camera interface (PIC16F84)

PIC ICD in-circuit debugger circuit diagram

PIC programmers for parallel port

Wisp628 ISP Microchip PIC Programmer

WLoader - PIC16F877 application loader / bootloader

Nixie clock (PIC16F876)

Zilog Z80 thermostat embedded web server

Picxie 2 - 8x8 Animated LED Signboard (PIC16F84) Picxie 2 - 8x8 Animated LED Signboard

10 tricks for interfacing to the PIC16C508

Interfacing the PIC16C508

PIC 5x7 display

Analog to digital conversion notes

Multi-chip programmer

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QSL.NET Advertising Info

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Motor Control

Bridge head

PWM motor controller

Transistor relay driver

Latching relay driver

Relay delay circuit

Touch switch

Low voltage DC motor speed controller

Flashing neon christmas lights

Three input first response monitor

Switch-on delay circuit

Electronic thermostat

LM3911 temperature controller

Programmable light-activated relay

Simple 10 Stage Control Box

One component stepper motor driver

Dual Stepping motor drivers using UDN2540

PWM DC motor control with SG3525

Stepper Motor Driver using TEA3718/3717

Microstepping with PBM3960 and TEA3718

DC Motor Driver with L6203

Stepper Motor Driver using L298 and L297

Several stepper motorol control circuits

Wireless RF PWM dual motor controller

H Bridge Motor Control Circuits

Motor speed controllers

Ceiling fan speed control

Delayed off light switch

Deoderizer fan timer

Electronic Thermostat Relay Circuit

Interfacing 5 volt CMOS to 12 volt loads

Light Activated Relay

CMOS Toggle Flip Flop With Relay(CD4013)

555 Timer Monostable Circuit Using Pushbutton

Dual Channel Servo Pulse to H-Bridge Interface

Current loop interface

Switching solenoid driver

Modular relay system

Light/dark detector

Pulse Width Modulation DC Motor Control

Stepper motor controller

Touch switch

Pump controller

H-Bridge motor controller (5 amps, 100 watts)

Dual Channel Servo Pulse to H-Bridge Interface

Servo pulse to PWM converter

12V Sump Pump Control

Rolling code 4-channel UHF remote control

DC Motor Speed Controller

3 Phase Brushless DC Motor Xtal Based Controller

DC motor controller

Garden moisture controller

Overload Voltage Protection with Automatic Reset

Pulse Width Modulator

Pulse Width Modulator Motor Speed Control

Pushbutton one-shot and latch (PDF)

Charge coupled bi-directional power MOSFET relay (PDF)

Finger touch activated switch (PDF)

Machine vibration triggers hour meter (PDF)

Solid state relay (PDF)

Line-powered Xenon flash transmitter (PDF)

9V Xenon photoflash controller (PDF)

AC switching with TRIAC from TTL

Control 120VAC relay with TTL

Driving a relay with a CPU

Power-line Appliance Controller

Simple Switched Servo Driver

Combination-controlled, fully customizable RF remote control

Thermoelectic controller (scriptable thermometer)

Stepper motor positioner

Stepper motor driver

Thermostat

Frequency switch

PIC16F84 RF remote controller

Stepper motor controller

H-Bridge shematic

DS1821 programmable thermostat

Hot Water Tank Indicator

Temperature monitor

Cold activated switch

Voltage comparator switch

Dark activated switch

DC Push Button Motor Control Circuit

Light detector

DC Motor Reversing Circuit

Sound operated switch

LDR light/dark activated relay switch

Touch Switches

6090 digital decoder schematics

Assorted relay control circuits

Adjustable Voltage motor controller

Serial servo controller

DC Motor-Driver H-Bridge Circuit

PWM Motor Speed Controller / DC Light Dimmer

Constant Temperature Circuit

PWM DC Motor Speed Control

Solenoid starter

CO2 controller for planted tanks

Light activated relay

Delayed shutter control for Kodak DC-20

Gasoline generator automatic throttle controller

Block power switching module

MOSFET H-BRIDGE schematic and theory

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PC

I2C printer port adaptor

RS232C Level Converter

PC electrically isolated RS422 interface using SN75176B or MAX485

PC electrically isolated RS485 interface using MAX487 or SN75176B

Short circuit protected power supply from PC 12V supply

Isolated Full Duplex RS232C Interface

RS232 DB-9 switch to flip between two serial ports

DB-9 Connector to DB-25 (both RS-232)

Mac Serial Port (RS-422 DIN-8) to RS-232 DB-25

Modem Rockwell RCV336/ACF model V1433VQR ext.

Genius Mouse schematics

EEPROM programmer

Commodore 64 24-bit parallel port interface with 8255

Sound Card Interface with Tone Keyer

RGB oo Monochrome converter - Matches impedance of PC to CCTV monitor

Ericsson phone to PC serial port interface

PC serial port receiver

Parallel port relay interface

ISA 48 I/O digital card

PC infrared iRDA interface using TFDS 4500

Jupiter card programmer

USB to RS232 Dongle

Parallel (Printer) Port Interface

RS-232 line monitor and loopback cables

The KD2BD Pacsat Modem

A Serial Infrared Remote Controller

PC Serial and Parallel Port Software and Interfaces

Interfacing 16x2 character :LCD to parallel port

RS-232 Protocol Analyser

Interface cable for Casio QV-200 digital camera

Radio clock for PC's

A PC-Based LowFER Frequency Synthesizer

General purpose 48-bit ISA parallel I/O card

Power from RS-232 port

PCI to ISA converter

WatchDog for ISA Bus

4-channel 8-bit analog-to-digital converter for PC

Printer port ADC

Parallel port ADC based on MAX147

Analog Signal Acquisition for PC Printer Port

More accurate PC/AT clock

Getting power from RS-232 interface

Barcode scanner

Build your own iRDA SIR Transceiver (Dongle) using MCP2120

PC thermometer

Dive computer interface

Parallel port servo controller

GPS receiver (Gamin, Eagle etc) to PC interface cables

Connect two CD-ROM drives to one soundcard

Headphone driving circuit for soundcards

Get power out of PC parallel port

Null Printer Adapter

PC speaker volume control circuit

How to get power from PC to your circuits

RS-232 surge protection

Simple RS-232 serial port buffer circuit

Get power out of PC RS-232 port

Sound Blaster Microphone Preamplifier

Sega 3D glass interfacing circuits

Convert Atari-style joystick to PC joystick port

Fake Joystick circuit

Using the joystick port as general purpose input

Connect other circuits to PC joystick port

Schematic of a standard PC joystick

Simple PC SmartCard reader

Fax to modem interface

Analog to Digital Conversion (ADC) and Communicating with a PC

Temperature sensor for PC

Interfacing to an IBM PC/AT keyboard

PC interface for point controller

Linux Infra-red Remote Control (LIRC)

Homebuilt RS232 LCD Interface

Compter microphone

CCD linear image sensor to PC parallel interface

Laptop Computer Serial Port Power Booster

Assorted computer interface circuits

HamComm Interface

Apple II/II+/IIe IDE Drive Interface

Basic Stamp I & PC Relay Controller

RS-232 to TTL cable

Hi-Fi PC Speaker System

IDE hard-disk interface for Amiga 500

How to construct Garmin GPS receiver interface cables

iRDA printer adapter

160 Baud ALDL Hardware Interface

AT PC Power Supply 1

AT PC Power Supply 2

AT PC Power Supply 3

AT PC Power Supply 4

AT PC Power Supply 5

iLINK Interface

Digital Signals Decoding Interfaces

9-pin null modem cable

RS232 - Lowe HF-225 interface

RS232 to IrDA convertor using Vishay TOIM3232

Interfacing PC sound card to SSB rig

Supply Derives Power From 3-Wire RS-232 Port

24-line PC digital interface (PDF)

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PDA

Casio interface circuits

SHARP palm-top/hand-held to RS232 serial converter

Interfacing ultrasonic range finder to BrainStem

Hamamatsu UVTron Interface to a BrainStem

Casio interface cable

Casio organiser hardware

MIDI interface for Palm computers

MIDI interface for Palm cradle

MIDI interface for Visor USB

MIDI-USB Cradle for Visor (Deluxe, Platinum)

MIDI interface for Visor

Casio datalogger

Interfacing ADXL202 accelerometer to PalmPilot

PalmPilot audio interface

PalmPilot cradle to modem adapter

PalmPilot connector pinouts

PalmPilot serial port interface

PalmPilot memory schematics

Aladin interface

PalmPilot turbo boost guage interface

IBM PC keyboard to PalmPilot interface

Aladin interface using op-amp

Wireless local network for PalmPilot (large PDF)

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