Friday, June 21, 2013

5:43 AM    No comments
Dick Cappels' Project Pages
Questions about projects on this site gladly answered.
projects(at)cappels.org
(Address is an image -please type it in.)

click on link below to go to the original website or to remove frame. URL is http://www.projects.cappels.org

http://projects.cappels.org/

(NEW PROJECTS MIGHT NOT SHOW UP UNTIL YOU REFRESH YOUR BROWSER WINDOW)

Microcontrollers, Analog, RF, and all three mixed.
Most projects can be assembled from readily available parts without the need for specialized equipment. My hope is that you will these projects helpful, and at least be able to make use of some of the bits and pieces you will find among them 
                       
Test and Measurement

         Voltage Recorder With Playback (ATMEGA48V) NEW Jaunray 2013

        A Simple Attenuator And Preamp For DC Measurements  (Analog Only) NEW Jaunray 2013

An Even Better LC Meter Based on Atmel AVR  ATTINY861

A Pretty Good LC Meter Based on an AVR (ATtiny2313, AT90S2313)

A Simple Manual Curve Tracer (analog only) 

A Photocell Amplifier for Comparative Light Measurements (analog only)

A 10 Bit LED Digital Panel Meter With Auto Ranging Based on ATMEGA 8   ATMEGA8

An Isolated Variable AC Mains Transformer

MAX038 Function/Sweep Generator with Markers (ATtiny2313, AT90S1200A)

A Noise Generator per IEC 268-1, IEC 268-5, and IEC 268-7 

1.000 kHz Sine Wave Generator  ATTINY2313/AT902313/ATMEAG8515/AT908515, etc.

LED Wink Tester For 1.5 Volt Cells  NEW February 2012

Battery Voltage Checkers 

LC Determination by Resonant Frequency Measurement (ATtiny2313, AT90S2313)

Inductance meter for RF Inductors

HF/VHF/UHF Test Oscillator

A Little More Serious Frequency Meter/Counter(ATtiny2313, AT90S2313)

A 300 MHz  Prescaler and 30 MHz preamp for A Little More Serious Frequency Meter

Frequency Meter and Pulse Generator (ATtiny2313, AT90S2313)

WATTMETER (uses DVM for display)

TRUE RMS-TO-DC Adapter For DVM

Digital Lock-in Milliohmmeter (ATtiny2313, AT90S2313)

HF AC Millivoltmeter adapter

Precision Audio Frequency Peak Detection Probe

Digital RF Field Strength Indicator (ATtiny2313, AT90S2313)

An RF Field Strength Meter Using A Biased Schottky Deterctor and  A Moving Coil Meter

A Field Strength Indicator -Analog only.

RF Field Strength Probe (AT90S1200A)

LTD - Low Cost Telemetering Device; ATMega8 scanning voltmeter with Morse Code output (ATMega8)

Waveform Monitor with LCD (ATtiny2313, AT90S2313)  

Simple LM335 thermometer

A Precision Portable Voltage Reference

AC Current Probe for Oscilloscope Use.  

Low Capacitance Scope Probe Adapter 

LED Driver circuits


         An Array of 180 UV LEDs

LCD Drivers (firmware)


RF and Communications
 
A 330MHz Remote Control With A Simulated Princeton Technolog PT2264 ATTINY2313

 A Simple FM Stereo Transmitter    (ATTINY12, ATTINY25, ATtiny2313, AT90S2313, AT90S232, or nearly any other CMOS microntroller-Yes probably even a PIC!)

FM Transmitter With Crystal Referenced PLL Frequency Control Using LMX1601 (ATtiny2313, AT90S2313) 

FM Broadcast Audio Transmitter

Battery operated FM rebroadcast transmitter

100 MHz modulated RF source for FM Band

90 MHz voltage controlled oscillator for FM Band

Minimum Mass Wireless Data Coupler-Near Field Communications (NFC)

Terminal Interface with Minimum Mass Wireless Coupler (ATtiny2313, AT90S2313) -Near Field Communications (NFC)

Scanning Voltmeter with Minimum Mass Wireless Coupler ATMega8)-Near Field Communications (NFC)

Frequency Meter with Minimum Mass Wireless Coupler (ATtiny2313, AT90S2313) -Near Field Communications (NFC)

LCD Display with Minimum Mass Wireless Coupler  (ATtiny2313, AT90S2313)-Near Field Communications (NFC)

Tiny Tuned Loop Antennas for the Minimum Mass Wireless Coupler-Near Field Communications (NFC)

Digital wireless for the bench top (ATtiny12) 

RS-232 to Wireless Instrument Data Channel (ATtiny2313, AT90S2313)

Frequency meter with wireless Data Channel (ATtiny2313, AT90S2313

4 MHz amplitude modulated RF source

1 W Experimental Output and 1 Meter Loop Antenna for 187 kHz (Lowfer)

1750 Meter Lowfer Band amplitude modulated RF source (ATtiny2313, AT90S2313)

A Dual Mode Superhet/Direct Conversion AM receiver for 181.818 kHz (Lowfer) (ATtiny2313, AT90S2313)

MK-484 Receiver Chip Evaluation Board for AM and Lowfer bands.

Programming Tools and Techniques     New -September 2012 AttoBasic 2.2 See AttoBasic Home

AttoBasic Home  ATMEGA32u4, ATMEGA88 ATmega 168m,ATmega328,AT90S8515/ATMEGA8515, ATmega163, andATtiny2313 /AT90S2313

AttoBasic WITH 32K OF EXTERNAL SRAM

AVR Firmware Monitor Program   (AVR Controllers with on-chip UART)

Minimum Mass Waveform Capture with AVR       (AVR controllers with RAM)

DS: Firmware based protocol for low priority data transfer

DS: Test and development tool for DS interface (ATtiny2313, AT90S2313)

DS: Clock/Calendar/Alarm with EEPROM-based interpreter and DS Interface (ATtiny12)

DS: 3 channel 8 bit EEPROM DAC with DS interface (ATtiny12)

ATtiny12 Fuse Restorer (AT90S1200A)

EEPROM Driver for 24LC64, 128, and 256 (AVR Controllers)

8 Channel PWM PWM Code (AVR Controllers)

AVR Serial Programmer (AT90S1200A, ATtiny2313, AT90S2313)

AVR 8 and 20 pin programming adapter

Lazy ISP Adaptor for Socketed AVR ISP Controllers

Decoding 4 buttons with 2 I/O pins   (Controllers with tristate I/O ports)

          An Experimental Triac Lamp Dimmer and Motor Speed Control Using A Simulated Diac


Specialty Projects

 Tips, Notes, and Techniques

Special Stuff


Featured link:   Sanjiv Dutta's LED Based Handycam Light Project
Sanjiv made a video camera light that uses 20 LEDs. I admire Sanjiv's inventivness.

Here are a couple of good datasheet sites. They seem to be somewhat better than the older ones.
http://www.datasheetdir.com/
http://www.dz863.com.

Are you in Ohio or Florida, USA and need a chimney inspection, other work, or advice? Consider Saint Clair Chimney Company http://www.saintclairchimney.com/

http://www.cappels.org  Main entry to cappels.org
A note about privacy

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