Android Oscilloscope
OBD2 Engine Rev Counter
OBD2 Diagnostic app
TFT Clock and Thermometer
WiFi, Ethernet
WiFi Thermometer
WiFi ESP8266
Doorbell with SD / EEPROM
SD FAT16/32 for .bmp
PETIT FAT bmp Display
TFT Timer, Thermometer
TFT Oscilloscope
SD Talking Clock
Android Talking Clock
SD Sound Recorder
SD FAT32 wav Player
SD Arduino Recorder
LED Thermometer
LED Timer
LCD Timer
TFT 10MHz Counter
100KHz Counter For PC
1MHz Counter For PC
8 Digits LED Counter
Scope Screen Counter
LCD Module Counter
LCD Arduino Counter
6MHz Android Counter
NIXIE Android Counter
Bluetooth Counters
USB Counter
USB TFT display BMP
USB DS18B20 Sensor
USB Thermometer
USB Meter
USB Oscilloscope
USB Input-Output
USB Input-Output Android
USB 16x2 LCD
Serial TFT Text
Serial Inputs Outputs
Serial Port LCD
MCP3201 on Serial Port
Serial Thermometer
Analogue Signal to Serial
Serial Thermostat
MCP3201 on LPT
Analogue Signal to LPT
LCD Display on LPT
Water Softener
HP Stream 7 docking
3.7V to 5V
Solar Charger
Infrared Decoder
PIC Music
Code Lock
Code Lock with LCD
HOME   Technical Tips


I developed and built these projects for my own use and they all work. The technical information is minimal but you are welcome to inquire for more info.
The purpose of this website is to make a little contribution to the vast amount of free knowledge on the Internet that I benefited from.
Please don't ask me to remotely troubleshot your circuit, I can't do it. Comments about errors or improvements are welcomed.


You have rights to use, modify and distribute this software in any way you find useful, provided that you agree that I have no warranty, obligation or liability for their contents.
See also Technical Tips

OBDII- OBDII diagnostic app, Windows and Android.
TFT CLOCK AND THERMOMETER- TFT display clock using PIC16F876A and DS18B20 sensors.
ANDROID FREQUENCY COUNTER- 6MHz frequency and voltage displayed on android using Bluetooth.
DOORBELL- Doorbell plays a tune from SD Card or EEPROM, for Arduino or PIC.
HP STREAM 7 DOCKING- Tablet HP Stream 7 docking station circuit diagram.
LED THERMOMETER- PIC16F628A and DS18B20 sensore -55 to 125 degrees thermometer.
USB TFT DISPLAY of BMP- TFT and PIC18F2550 display bitmap picture loaded from PC.
SERIAL PORT TFT TEXT DISPLAY- TFT and PIC16F876A to display text from PC.
USB DS18B20 THERMOMETER- Digital sensor -55 to 125 centigrade.
SD - FAT Bitmap Display- PIC16F876A, TFT Module and Petit FAT display BMP file.
TFT TIMER- PIC16F876A and 1.8" LCD TFT module with touch screen timer.
LCD TFT OSCILLOSCOPE- PIC16F876A and 1.8" LCD TFT module low frequency oscilloscope.
LCD TFT FREQUENCY COUNTER- PIC16F690 / PIC16F876A, 1.8" LCD TFT module frequency counter.
TALKING CLOCK- Clock that tells the time from user own voice recorded on the SD Card, LCD module.
SD/SDHC SOUND RECORDER- PIC16F876A, SD records and replays audio, FAT32 wav player. ARDUINO version.
SERIAL INPUTS OUTPUTS- PIC16F870 powered by the serial port, interface inputs outputs to the PC.
SERIAL LCD- PIC16F628A drives LCD powered by the serial port.
IR DECODER- PIC16F628A TV remote to PC converter.
PIC MUSIC-PIC12F629 Happy Birthday tune.
CODE LOCK- PIC16F628A electronic key pad lock.
CODE LOCK with LCD- PIC16F870 electronic key pad lock with LCD module.
LED TIMER- PIC16F628A 2 digits 99 minutes Led display timer.
LCD TIMER- PIC16F628A 1 seconnd to 99 minutes LCD Module timer.
ANALOGUE TO SERIAL PORT- PIC12F675 self powered analogue to digital converter.
100KHz for PC- PIC16F628A self powered serial port counter, 100mV input.
1MHz for PC- PIC16F628A self powered serial port counter.
50 MHz 8 DIGITS LED FREQUENCY COUNTER - PIC16F628A 8 Digits Frequency Counter.
OSCILLOSCOPE SCREEN - PIC16F628A Frequency displayed on oscilloscope screen.
LCD COUNTER - PIC16F628A drives 1 line 16 char LCD module.
USB THERMOMETER- 0 to 100 °C thermometer self powered by the USB.
USB METER- PIC18F2550 used for measurement of frequency, voltage, capacitance and inductance.
USB COUNTER- frequency counter and analogue 5V input to USB port.
USB OSCILLOSCOPE- 1KHz bandwidth oscilloscope with trigger.
USB INPUT_OUTPUT- 4 analogue inputs, 4 digital inputs and 4 outputs.
USB 16x2 LCD Display- USB drive for2 lines 32 characters LCD display module.
MCP3201 TO PARALLEL PORT- ADC MCP3201 powered by the parallel port.
ADC0804 TO PARALLEL PORT- Input 5V analogue to PC.
MCP3201 TO SERIAL PORT- ADC MCP3201 powered by the serial port.
SERIAL PORT THERMOMETER- Thermometer powered by the serial port, -20 to 130 °C.
SERIAL PORT THERMOSTAT- Thermostat with a relay controlled by the PC.
LCD Display on LPT- 16x2 characters LCD display module connected to the parallel port.
WATER SOFTENER- electronic device for softening hard water.
3.7V to 5V Converter- low power 3.7V to 5 or 9 volts converter.
SOLAR BATTERY CHARGER- high efficiency battery charger for solar cells.

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