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Application AVR single chip controllers
AT90S, ATtiny, ATmega

of ATMEL in practical examples
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Sorted list of applications

  1. Hardware, General
  2. Timers, Stop watches
  3. Watches
  4. Models and steppers
  5. LED applications
  6. Dices
LinkBrief descriptionAVR type
1 Hardware, General
Comtinuity-checker tn25 A continuity-checker for 0 to 10 Ohms with 30 different tones and two LEDs ATtiny25
Spectrum analyzer tn2313 A spectrum analyzer for rectangles with a crystal and an RS232 interface ATtiny2313
Sine generator tn45 with PWM Sine wave generator with tn45 and fast PWM, 64MHz-PWM-frequency, 20Hz to 20kHz sine with 10-turn potentiometer for frequency adjustment, 20MHz crystal operation of the ATtiny45, up to four-stage RC filters, cap selector with tn25 for n * 4 capacitors with CMOS 4066, extensive LibreOffice spread-sheets for simulation and assembler software configuration ATtiny45
ATtiny25
PT100-Thermometer Thermometer with a PT100 sensor, to be attached to a TN24-LCD module for displaying Kelvin, °Celsius, °Fahrenheit and the resistance of the sensor with 0.01 resolution as well as the raw ADC count, with extensive spread-sheet ATtiny24
Thermometer over serial IR Thermometers with serial interface over Infrared, measuring temperatures with an ATtiny45 and transmitting those with infrared to a IR-to-serial converter and to an RS232 interface, with extensive hard- and software still under construction ATtiny45
ATtiny25
IR transmitter variable Infrared transmitters with variable frequencies linear, with crystals ATtiny25
ATtiny24
Thermometer with ATtiny24 Thermometer with the built-in thermo sensor in an ATtiny24, with 8-character LCD, adjustable with trim potentiometers or by software, selectable output in K, °C or °F, accuracy up to one tenth of a degree ATtiny24
Crystal oscillator
8-bit-TC
16-bit-TC
Between 8 and 57 tones of the gamut plays a crystal-driven ATtiny25 with an 8-bit TC here, a 16-bit TC version for up to 60 tones is here, with versatile spreadsheets in LibreOffice-calc to configure the tones and the resistors of the switch encoders ATtiny25
ATtiny24
Crystal oscillator 16-stage crystal divider with an ATtiny25, divides a crystal frequency by 16 different values, as selected either by a mouse piano or by a potentiometer, with spreadsheet in LibreOffice-calc ATtiny25
Power supply scanner A scanner for power supplies with RS232 interface and/or LCD ATmega48
ATmega324PA
Tiny crystal oscillator A crystal oscillator with an ATtiny25 generates accurate seconds, minutes and hour pulses, works with nearly any commercially available crystal, LibreOffice-calc spreadsheet included for easing software modification ATtiny25
Hysteresis on AVR inputs Hysteresis voltages on AVR input pins, use and measurement (Any)
Digital analog conversion with R/2R R/2R network sine generators for DAC conversion, two practical examples ATtiny24
ATmega324
Random generators Random numbers, calculation in assembler, display on a RGB-LED, randoms from noise or from a sine wave oscillator, via a RS232 interface to a PC and analysing them there ATtiny13
DCF77 receivers A series of DCF77 receivers of different types: straight, superhet, cross antenna, etc. ATtiny25
ATtiny45
Tiny crystal oscillator A crystal oscillator to generate accurate rectangles with a selectable frequency, with several hints on using crystals as clock sources for ATtiny devices and with an ultimate calculation tool ATtiny25
DCF77 signal analysis ATtiny24 DCF77 signal analysis, measures signal durations, with export of the data to a CSV file and import to an OpenOffice spreadsheet ATtiny24
Signalgenerator ATmega16 Signal generator with ATmega16, provides sawtooth, sine, triangle and rectangle signals between 2 Hz and 20 kHz, with an LCD for wave and frequency display, linear variable resistor to adjust frequency and four switches for mode selection ATmega16
LCDs LCDs on an AVR, a universal include file for tailoring any LCD in any mode on an AVR, with two example applications Any
N keys Multiple keys on an ADC input pin Any
Follow me Follow me - audio sensor with electret microphone ATtiny45
Gate tn24 Servomotor controller for model railroad crossing gates ATtiny24
Levelmeter Audio level meter with a 4 line LCD - Configurable in wide varieties of sensivity, linear and log, etc. ATtiny24
IR switch Infrared receiver and three channel switch, self-learning ATtiny13
Frequency counter ATmega8 Frequency counter, nine modes, 16 MHz xtal ATmega8
Pulse widtg generator with SIO control Pulse generator, generates exact signals of a desired duration and frequency, controlled by an ANSI-compatible terminal via a SIO AT90S8515
Rectangle generator ATmega8 Signal generator with frequency and pulse-width adjustment and display on LCD ATmega8
2 Timer, Stop watches
Egg timer tn24 v2 An egg timer with 10 LEDs and a speaker, very small design with low-current LEDs and ten melodies ATtiny24
Long timer ATtiny25 Long timer with a duo-LED and a speaker ATtiny25
Long timer ATtiny13 Long timer with a duo-LED ATtiny13
Eggtimer RGB M8515 Eggtimer with 11 RGB LEDs and ATmega8515 ATmega8515
Multitimer A timer for 5 seconds to 7 minutes in 12 stages with 12 LEDs and three buttons ATtiny24
Stop watch Three stage stopwatch with an ATtiny24 ATtiny24
Stop watch Four channel stopwatch with an ATmega8 ATmega8
UV exposure UV-LED array as exposure device with timer and LCD ATtiny2313
Egg watch with ATtiny2313 Eggtimer as a gift ATtiny2313V
3 Clocks
Clock60+4 Clock with 60 plus 4 LEDs, shiftregisters and an ATmega48 ATmega48
Circular-led m324pa Circular LED clock with 32 LEDs on an ATmega324PA ATmega324PA
RGB BCD watch A BCD encoded watch with 20 four color RGB leds, with multiplexing, brightness control and time adjustment ATmega16
Large watch ATmega48 Very large watch with 114 10mm LEDs, intensity control with potentiometer or foto transistor, time adjustment with two keys or with a DCF77 receiver ATmega48
DCF77 clock m16 A DCF77 synchronized clock with LCD ATmega16
Binary watch Binary watch with 20 LEDs ATmega8
Digital clock with ATmega16 Digital clock and alarm timer, 7-segment displays, Xtal control, and much more ATmega16
4 Models and steppers
IR-Stepper tn24 Infrared-controlled stepper motors, two steppers controlled by one ATtiny24, IR transmitter and controller with an LCD and an ATtiny24 ATtiny24
Gate tn24 Servomotor controller for model railroad crossing gates ATtiny24
Stepper tn24 Stepper motor 28BYJ-24 control for modeling applications ATtiny24
Stepper motor control ATtiny13 Stepper motor controller and driver, voltage controlled position ATtiny13
PCM decoder with AT90S2323 PCM-encoded remote control signals with a length from 0.8 to 2.2 ms are decoded using an AT90S2323 to convert to an analogue voltage AT90S2323
5 LED applications
Ticker 16x8 A text ticker with LEDs in four different versions, with small or large LEDs, including design software for pixels ATtiny24
ATmega48
ATmega324PA
Clock60+4 Clock with 60 plus 4 LEDs, shiftregisters and an ATmega48 ATmega48
Circular-led m324pa Circular LED with 32 LEDs on an ATmega324PA ATmega324PA
Eggtimer RGB M8515 Eggtimer with 11 RGB LEDs and ATmega8515 ATmega8515
RGB BCD watch A BCD encoded watch with 20 four color RGB leds, with multiplexing, brightness control and time adjustment ATmega16
Large watch ATmega48 Very large watch with 114 10mm LEDs, intensity control with potentiometer or foto transistor, time adjustment with two keys or with a DCF77 receiver ATmega48
Spotlight ATtiny13 Spotlight with 198 10mm LEDs, intensity regulator with potentiometer and battery monitoring ATtiny13
Ticker A text ticker with 192 LEDs ATmega16
Magic circle Magic circle with 13 LEDs ATtiny2313
Led line with ATtiny13 Driving two LED lines and controlling intensity with two potentiometers ATtiny13
Led light ATtiny13 Led light chain sequencer ATtiny13
LED grave 8x8 ATmega16 8-by-8 LED matrix ATmega16
6 Dices
Dice ATmega16 Tumbling dice with two seven-segment-displays and statistical analysis in EEPROM ATmega16
Dice ATtiny13 Tumbling dice, seven LEDs and a pushbutton, with PCB layout ATtiny13


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