An Even Better LC Meter Based on Atmel AVR ATTINY861
A Pretty Good LC Meter Based on an AVR (ATtiny2313, AT90S2313)
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 RF Field Strength Meter Using A Biased Schottky Deterctor and A Moving Coil Meter
An Isolated Variable AC Mains Transformer
MAX038 Function/Sweep Generator with Markers (ATtiny2313, AT90S1200A)
1.000 kHz Sine Wave Generator ATTINY2313/AT902313/ATMEAG8515/AT908515, etc.
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)
Digital Lock-in Milliohmmeter (ATtiny2313, AT90S2313)
HF AC Millivoltmeter adapter
Precision Audio Frequency Peak Detection Probe
Digital RF Field Strength Indicator (ATtiny2313, AT90S2313)
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
A Pretty Good LC Meter Based on an AVR (ATtiny2313, AT90S2313)
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 RF Field Strength Meter Using A Biased Schottky Deterctor and A Moving Coil Meter
An Isolated Variable AC Mains Transformer
MAX038 Function/Sweep Generator with Markers (ATtiny2313, AT90S1200A)
1.000 kHz Sine Wave Generator ATTINY2313/AT902313/ATMEAG8515/AT908515, etc.
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)
Digital Lock-in Milliohmmeter (ATtiny2313, AT90S2313)
HF AC Millivoltmeter adapter
Precision Audio Frequency Peak Detection Probe
Digital RF Field Strength Indicator (ATtiny2313, AT90S2313)
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
White LED drive from 1.5V
White LED inductorless drive from 1.5V and 3V
R/C Model Aircraft Marker Light Flasher (ATTINY12 and others)
Fast precision LED driver
Flying inductor LED series voltage boost circuit. (Power supply in series with the battery and LED)
White LED Power Failure Light
White LED Stroboscope With Constant Duty Cycle and Constant Current Drive
1.5 Volt 1970's Style Caboose Marker Flashing Red LED Light.
Simplest LED Flasher circuit
White LED inductorless drive from 1.5V and 3V
R/C Model Aircraft Marker Light Flasher (ATTINY12 and others)
Fast precision LED driver
Flying inductor LED series voltage boost circuit. (Power supply in series with the battery and LED)
White LED Power Failure Light
White LED Stroboscope With Constant Duty Cycle and Constant Current Drive
1.5 Volt 1970's Style Caboose Marker Flashing Red LED Light.
Simplest LED Flasher circuit
LCD Drivers (firmware)
Serial Interface for Truly MTC-C162DPLY-2N, 2 line X 16 char LCD display (AVR controllers with RAM)
Serial Interface and bias supply for Seiko-Epson G1216B dot graphics display (ATtiny2313, AT90S2313)
Serial Interface and bias supply for Seiko-Epson G1216B dot graphics display (ATtiny2313, AT90S2313)
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
100 MHz modulated RF source for FM Band
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
Terminal Interface with Minimum Mass Wireless Coupler (ATtiny2313, AT90S2313)
Scanning Voltmeter with Minimum Mass Wireless Coupler ATMega8)
Frequency Meter with Minimum Mass Wireless Coupler (ATtiny2313, AT90S2313)
LCD Display with Minimum Mass Wireless Coupler (ATtiny2313, AT90S2313)
Tiny Tuned Loop Antennas for the Minimum Mass Wireless Coupler
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.
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
100 MHz modulated RF source for FM Band
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
Terminal Interface with Minimum Mass Wireless Coupler (ATtiny2313, AT90S2313)
Scanning Voltmeter with Minimum Mass Wireless Coupler ATMega8)
Frequency Meter with Minimum Mass Wireless Coupler (ATtiny2313, AT90S2313)
LCD Display with Minimum Mass Wireless Coupler (ATtiny2313, AT90S2313)
Tiny Tuned Loop Antennas for the Minimum Mass Wireless Coupler
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
AttoBasic Byte-Wide interpreter for ATtiny2313 and AT90S2313
AttoBasic AT90S8515/ATMEGA8515 and ATmega163
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)
AttoBasic AT90S8515/ATMEGA8515 and ATmega163
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
Electrete Condenser Microphone Line Level Preamplifer Powered by USB
Barker Code-Locked Loop Synchronous Demodulator(ATtiny2313 or AT90S2313, ATtiny12)
A Regulated 24 Volt Output, 5 Volt Input DC To DC Converter
Half-flying capacitor analog multiplexer for microcontrollers (AVR Controllers or other with tristate I/) pins)
Single Pulse Voltage Multiplier
EDFET Buffer.
Experimental 1 kHz Synchronous Demodulator (ATtiny2313, AT90S2313)
Audio noise generator drives earphones or small speaker
Barker Code-Locked Loop Synchronous Demodulator(ATtiny2313 or AT90S2313, ATtiny12)
A Regulated 24 Volt Output, 5 Volt Input DC To DC Converter
Half-flying capacitor analog multiplexer for microcontrollers (AVR Controllers or other with tristate I/) pins)
Single Pulse Voltage Multiplier
EDFET Buffer.
Experimental 1 kHz Synchronous Demodulator (ATtiny2313, AT90S2313)
Audio noise generator drives earphones or small speaker
Specialty Projects
Garden Watering Timer (Gates and counters; no microcontroller)
USB Printer Sharing Switch
ADSL_Splitter_Sharing_Adapter
Door chime Privacy Sentry (ATtiny12)
Morse Code Alarm Clock modification with ATtiny2313/AT90S2313
Bedwetting alarm
Tips, Notes, and TechniquesUSB Printer Sharing Switch
ADSL_Splitter_Sharing_Adapter
Door chime Privacy Sentry (ATtiny12)
Morse Code Alarm Clock modification with ATtiny2313/AT90S2313
Bedwetting alarm
Toroid and Ferrite Bead Winding Notes
Transistor_matching (New -January 2011)
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