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Site Map

This page gives you easy access to all the information on the site.

Digispark Attiny85

How to install and use the Digispark Attiny85

Specific IC Tutorials using Arduino

HMC5883L - How to use this magnetometer as a compass (aclually how t oget any reading out of it at all!).

INA219    - A digital (I2C) Current meter; Measuring current and power used. This is for low volt systems <=26V but gives highly accurate current voltage and power measurements.

ACS712   - A Hall Effect medium current (±5A, ±20A, ±30A) measuring device which It can also withstand 2100Vrms!

ACS758   - A Hall Effect High current (50A~200A) measuring chip with analogue output. It can also withstand 700Vrms!

MCP4725 - A digital (I2C) controlled DAC and a look at the related MCP4726.

MCP4728 - A 4 output digitally controlled DAC (I2C).

MCP4922 - A two output digitally controlled DAC (SPI). How fast does it go?

PCF8591 - A 4 input I2C ADC. This is an 8 bit ADC which also includes a DAC.

TP4056 - How to use this Lithium ion/poly battery charger the right way.

DW01A - Lithium ion/poly battery protector. This is used in the TP4056 board.

ADXL345 - How to use the ADXL345 accelerometer to measure roll and pitch.

ADS1115 - How to use this 16 ADC to measure 7.8uV. This is a precision device that you can use to make accurate measurements. It can even measure a small range of negative voltage - useful for sink/source current measurements.
 
AD9833 - Make a signal generator using the DDS chip to 12.5MHz. Outputs sine, square and triangle waves with a resolution of 0.1Hz.

MAX7219 - How to drive 8x8 led displays using this chip.

DS18B20 - Use the one-wire thermometer to measure accurate temperature; multi drop and long distance.

DHT22 - Also DHT11 (lower spec) - Measure humidity and temperature.

TCS230 - Let your microcontroller see colour!

HD44780 - LCD display driving. Usually a 16 character by 2 line display but can be 20x4.

MCP23017 - A 16 bit port expander (I2C) with comprehensive interrupt system.

MCP23017 Interrupts - Using multiple MCP23017 with interrupts.

BMP280 - Barometric pressure measurement.

Battery Charger - How to charge standard AA batteries.

Pulse Rate - Measurement See your pulse rate using infrared sensors.

Rotary Encoder - How to use them and make even noisy ones behave!

Arduino Joystick - Making the joystick easy to use with a useful library.

MAX6675 - How to measure temperature from 0°C to 1024°C

Logic level converter - How to convert logic levels using a MOSFET Trick!

SSD1306 - How to write text and graphics to this 1" display.

Arduino Hardware Tutorials

Three switch debouncing methods on Arduino : One is amazing!

Arduino Capacitive Sensor Sense objects using only a wire and an ADC input.

Arduino ADC - How it works; Find out its resolution and more.
    Should you should divide by 1023 or 1024 in ADC calculations?

Arduino voltage reference - The internal voltage reference is often overlooked.
    Find out how to use it and make it accurate and reliable.

Arduino Analog Output - How to smooth PWM signals and create sine waves.

Arduino EEPROM - How to read and write EEPROM.
    EEPROM has a lifetime - make sure you don't use it up all at once!

Arduino Nano ISP - How to burn a bear-board Arduino using an Arduino Nano.    You end up with about 4 components - just use a USB to serial adaptor and a 5V power supply.

Arduino Code Specific Tutorials

Arduino delay() - How to delay the processor so a human can see events!

Arduino millis() - Time events using milliseconds without stopping the processor.

Its a useful timer but there's a little bit of interesting code in its operation that makes it skip a beat sometimes? Should you worry about this?

Arduino pulseIn() and pulseInLong() - How to measure pulse inputs.

One of these MUST be used with interrupts turned ON.
One of these MUST be used with interrupts turned OFF.
Do you know which?

Arduino digitalWrite() - How to write a binary signal to the 0-5V output pin.

digitalWrite is a very useful generic function but you can operate 17 times faster using direct write macros - all explained in the link above

Arduino map() - Why it does not always do what you want.

Arduino for loop - How it works and how to avoid a simple mistake in using it.

Arduino while loop - How to use it and how it is different to the for loop.

Arduino interrupt - How to use them and how to get MORE, many more!!

Arduino String - How to decode serial port data into commands.

What is the difference in using a String object and using c strings?
Should you use String at all? Memory fragmentation can occur.
Find out about these issues in the link above.

Arduino shiftOut - Find out how to control serial chips with this function.

Arduino shiftIn - Find out how to read serial data from chips.

Arduino Absolute Value - is abs() simple - it should be! - there are pitfalls!

Lolin nodeMCU ESP8266 ESP-12E

ESP8266 Arduino IDE - Learn how to program an ESP8266 using the Arduno IDE.

NodeMCU Firmware - Return the LUA scripting language back into an ESP8266.

ESPLorer - How to use ESPLorer to upload lua scripts to an ESP module.

NodeMCU Examples - from simple LED blink to wifi use.

ESP8266 Webserver - How to make a nodeMCU webeserver to control LEDs.

Sections

PIC Projects

16F877 : 50MHz LCD frequencycounter.

16F877 : 50MHz 7 segment frequencycounter.

16F877 : 0-5V LCD volt meter.

16F877 : LCD and Keypad using one 8 bit port (noglue logic).

Direct jump to locked page (needs unlock code)

16F877 : Driving an RGB LED.

16F877 : Serial LCD module.

16F88 : Ultrasonic range finding project.

16F88 : A Real Time Clock (DS1307) using I2C.

16F88 : Driving an LED dot matrix.

16F88 : Universal Infrared Receiver (UIR).

16F88 : Binary Clock

12F675 : Tutorial 12F675 : RS232 Serial transmitter

PIC Parallel Port Programmer.

12F675 : Serial Temperature Logger

12F675 : EEPROM Temperature logger

12F675 : Servo motor driver

12F675 : Servo motor - serial control

Tips and Techniques

General	Resources
ICSP	PIC device comparison
ICSP programming
RS232	RS232 pinout
Debugging Techniques	Using PIC I/O : TRIS, PORT
PIC Timer overview	Crystal ppm calculations
I/O Expansion techniques	Interactive Timer 0 calculator
PIC Programmers	Interactive Timer 1 calculator
	Interactive Timer 2 calculator
Hardware specific
Switch debouncing	Setting up RS232
12F675 : Setting OSCCAL in C	12F675 :Recovering lost calibration
	Use the voltage reference module  as a DAC
Software specific
Hexadecimal conversions
Soft USART (TX) (TX details)	Soft USART (RX/TX) (RX details)
Using fixed point maths
Other
Reading schematics	Multitasking
Prototyping	Electronic schematic symbols
Using an oscilloscope	PWM

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PIC Tutorial

Devices
12F675	16F84
Hardware
PIC Introduction	ICSP	Interrupts
Software
MikroC compiler
Protocols
I2C	RS232	Setting up RS232
SPI
Techniques
Frequency counting	Ultrasonic range finding	Software Tri PWM
Multiplexing	CCP (capture)	Soft PWM
Timer 1 (polled)

PIC Programmer information

All about programming PIC Microcontrollers.

Articles

PIC micro programming methods.

PIC timer calculations.

Frequency counter techniques: Direct and Reciprocal counting methods.

Simple multitasking method (works for 12F675 and larger).

Microcontroller Debugging methods (also general debugging methods).

Fixed point maths

Hardware interrupts - a short introduction.

How to use the MC78M05BDTRKG voltage regulator.

Courses and Ebooks on sale

C Course

A new C course showing you how to use C to program a microcontroller (no previous programming experience needed).

Pic C Course (digital download).

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