With the PIC Timer 1 calculator you can see the resulting frequencies and
periods when you change three pieces of information. :
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sliders let you change the values by dragging a control up and down on the
screen and the resulting changes are immediately shown in this page. The
first is for the prescaler and the other two are the high and low byte for the
timer value. You can also set the timer value by typing into the spinbox - top
left (or use the up/down arrows to change the value in the
With the ADXL345 acellerometer you can detect up to 16g! You can also find out how to use it for tap detection and more.
HMC5883L - How make a digital compass, Find out the differences between the HMC5883L and the QMC5883L and whether they are compatible.
Easily use an ESP8266 with the Arduino IDE and program your first sketch into the ESP8266
The MCP4725 chip is a 12 bit DAC with memory that outputs voltage that you can use for many dfferent purposes. Find out what they are in this page.
PCF8591: A four input ADC with single DAC. How good is this 8 bit ADC, and should you use it in your next project?
Arduino Nano ISP: How to program an ATmega328P using an Arduino Nano as the ISP programmmer. One common problem: Programming a sketch into the chip without a reset control - solved here.