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SD FAT32 Sound Recorder
SD Card Data Logger
FAT32 Player ATtiny85/45
Birthday Card ATtiny85 / PIC
ATtiny85/45 Counter
ATtiny85/45 EEPROM Doorbell
ATtiny Water Softener
CH341 USB TO I2C/SPI/EPP
USB to I2C OLED
USB to LCD
USB Input Output
SD CARD
CH376 USB Picture Frame
SD FAT32 Player PIC12F1822
W25Q64 Flash Recorder
Picture Frame PIC16F690
Color OLED Picture Frame
SD FAT32 TFT Display
Doorbell with SD/EEPROM
SD Talking Clock
SD Sound Recorder
SD FAT32 wav Player
SD Arduino Recorder
Arduino Picture Frame
FREQUENCY COUNTER
AD9833 Waveform Generator
Chrome Browser Counter
Arduino LED MAX7219 Counter
LCD Accurate Counter
OLED Accurate Counter
MilliHertz Counter
PIC Counter For Android
MAX7219 LED Counter
WiFi Frequency Counter
Frequency Generator
OLED Counter PIC12F629
Talking Frequency Counter
TFT Counter PIC16F628A
SSD1306 Counter PIC16F628A
SSD1331 Counter PIC16F628A
Arduino Counter for PC
OLED Arduino Counter
OLED Frequency Counter
TFT 10MHz Counter
PC Counter
LED Counter
Scope Screen Counter
LCD 16 x 2 Counter
LCD Arduino Counter
6MHz Android Counter
NIXIE Android Counter
Bluetooth Counters
USB Counter
OBD2
OBD2 RPM meter PIC16F876A
OBD2 Engine Rev Counter
OBD2 Diagnostic app
OSCILLOSCOPE
Logic Analyzer
PIC12F1822 Scope for PC
Arduino Oscilloscope for PC
Arduino OLED Oscilloscope
Android Oscilloscope
TFT Oscilloscope
USB Oscilloscope
THERMOMETER
Thermocouple 1023 Deg
Thermometer For Browser
OLED Thermometer PIC12F629
OLED Room Thermostat
TFT Clock and Thermometer
LED Thermometer
USB Thermometer
Serial Thermometer
Serial Thermostat
USB DS18B20 Sensor
TIMER / CLOCK
Cuckoo Clock
Real Time Clock DS3231
LED TM1637 Timer
OLED Timer Thermometer
TFT Timer Thermometer
LED Timer
LCD Timer
Clock Thermometer
Talking Clock PIC16F628A
Android Talking Clock
WiFi
WiFi, Ethernet
WiFi Thermometer
WiFi ESP8266
USB
IO for Chrome Browser
USB 16x2 LCD
USB TFT display BMP
USB Meter
USB Input-Output
USB Input-Output Android
DATA ACQUISITION
Analogue to USB (CH341)
MCP3201 on Serial Port
PC Analog Input (USB-UART)
SERIAL PORT
Serial TFT Text
Serial Inputs Outputs
Serial Port LCD
Analogue Signal to Serial
OTHERS
Talk to Arduino
HC-SR04 Sensor
OLED Amp Meter
PC digital I/O (no coding)
Analogue Signal to LPT
LCD Display on LPT
Water Softener
Solar Charger
PIC Music
Code Lock
SMALL PROJECTS  
  Technical Tips  

LCD AND KEYPAD AD9833 WAVEFORM GENERATOR

AD9833 module is a 0-10Mhz waveform generator with integral 25MHz crystal oscillator, the output frequency is set by the SPI controlled divider of the AD9833. A DAC shapes the sine and triangle waveforms, amplitude is 600mV. Squarewave amplitude is 5V. The PIC16F876A drives the AD9833 using SPI. The Frequency in the AD9833 is selected by 28 bit value which gives about 0.1Hz resolution, the PIC limit of LONG numbers allows accuracy of about 0.01%.
Key * selects between Sine, Triangle (300mV) or Squarewave (5V). Key # starts frequency setting by entering 7 numerical keys.
The 16x2 LCD module has to be HD44780 compatible.
AD9833 from eBay: https://www.ebay.co.uk/

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LCD 10MHz AD9833 WAVEFORM GENERATOR

AD9833 module is a 0-10Mhz waveform generator with integral 25MHz crystal oscillator, the output frequency is set by the SPI controlled divider of the AD9833. A DAC shapes the sine and triangle waveforms, amplitude is 600mV. Squarewave amplitude is 5V. The PIC drives the AD9833 using SPI. The Frequency in the AD9833 is selected by 28 bit value which gives about 0.1Hz resolution, the PIC limit of LONG numbers allows accuracy of about 0.01%. PIC16F628A uses software SPI.
Pushbutton WAVEFORM selects between Sine, Triangle (300mV) or Squarewave (5V). Digit pushbutton selects the digit to set, INC pushbutton increments the digit.
The LCD of 16x2 display the High and Low Frequencies. The 16x2 LCD module has to be HD44780 compatible.
AD9833 from eBay: https://www.ebay.co.uk/

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ARDUINO LCD AND KEYPAD 10MHz AD9833 WAVEFORM GENERATOR

AD9833 module is a 0-10Mhz waveform generator with integral 25MHz crystal oscillator, the output frequency is set by the SPI controlled divider of the AD9833. A DAC shapes the sine and triangle waveforms, amplitude is 600mV. Squarewave amplitude is 5V. The Arduino drives the AD9833 using SPI. The Frequency in the AD9833 is selected by 28 bit value which gives about 0.1Hz resolution, the Arduino limit of 32 bits numbers allows accuracy of about 0.01%.
Key * selects between Sine, Triangle (300mV) or Squarewave (5V). Key # starts frequency setting by entering 7 numerical keys.
The 16x2 LCD module has to be HD44780 compatible.
AD9833 from eBay: https://www.ebay.co.uk/

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ARDUINO LCD 10MHz AD9833 WAVEFORM GENERATOR

AD9833 module is a 0-10Mhz waveform generator with integral 25MHz crystal oscillator, the output frequency is set by the SPI controlled divider of the AD9833. A DAC shapes the sine and triangle waveforms, amplitude is 600mV. Squarewave amplitude is 5V. The Arduino drives the AD9833 using SPI. The Frequency in the AD9833 is selected by 28 bit value which gives about 0.1Hz resolution, the Arduino limit of 32 bits numbers allows accuracy of about 1%.
Pushbutton WAVEFORM selects between Sine, Triangle (300mV) or Squarewave (5V). Digit pushbutton selects the digit to set, INC pushbutton increments the digit.
The 16x2 LCD module has to be HD44780 compatible.
AD9833 from eBay: https://www.ebay.co.uk/

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PC WAVEFORM GENERATOR AD9833 VIA USB CH341

CH341 module (from eBay) converts USB to SPI, the module links are set to 5V and i2c-spi. AD9833 module is a 0-12.5Mhz waveform generator with integral 25MHz crystal oscillator, the output frequency is set by the SPI controlled divider of the AD9833. A DAC shapes the sine and triangle waveforms, amplitude is 600mV. Squarewave amplitude is 5V.
The 2N7000 mosfet is for digitally inverting the clock (SCK), the AD9833 wants idle high signal. The mosfet can be replaced by any small signal N mosfet or any digital inverter like CMOS 4049.
PC app is in Visual Basic-VS2010, type in the desired frequency.
AD9833 from eBay: https://www.ebay.co.uk/
The VB wrapping of DLL is taken from GitHub https://github.com/aa4e/ch341_vb . DLL is installed to PC by setup.exe in downloaded driver CH341PAR.ZIP https://www.wch.cn/downloads/CH341PAR_ZIP.html

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LCD 244Hz TO 4MHz PIC16F1827 FREQUENCY GENERATOR

PIC generates 244-8,000,000 Hz by dividing the 32 MHz from crystal oscillator and PLL. The pushbuttons set the division from 0 to 255 holding the button advance the frequency every second.. The high frequency output at pin 2 is 4000000 / division , the low frequency output at pin 3 is 62500 / division. Division is by integer so not all frequencies can be set, for example the High Frequency output can be 4, 2, 1.333, 1 MHz etc.
The LCD of 16x2 display the High and Low Frequencies. The LCD module has to be HD44780 compatible.
The outputs are generated by using TMR2 and CCP3, TMR4 and CCP4 in PWM mode.

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LCD 244Hz TO 8MHz ARDUINO FREQUENCY GENERATOR

Arduino Uno or Nano generates 244-8,000,000 Hz by dividing the 16 MHz crystal oscillator. The pushbuttons set the division from 0 to 255 holding the button advance the frequency every second.. The high frequency output at pin 9 is 8000000 / (division + 1) , the low frequency output at pin 11 is 62500 / (division + 1). Division is by integer so not all frequencies can be set, for example the High Frequency output can be 8, 4, 2.666, 2, 1.6, 1.333 MHz etc.
The LCD of 16x2 display the High and Low Frequencies. The LCD module has to be HD44780 compatible.
The software is for Arduino with ATMEGA328. The outputs are generated by using Timer2 and Timer1 in CTC mode.

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