Project: How To Build a PID Control Line Follower Robot

#HowTo #Build a PID Control Line Follower #Robot

Youtube Video:

KittenBot Team has shared a PID Control Line Follower Robot project. Though KittenBot has used thier own hardware for this purpose, you can understand and how the Line Following Robot Works and build your own. Project Page on


How to Make Threads with Taps and Dies

#Howto Make #Threads with #Taps and #Dies

As you work on your project you often need to tighten two things. Screws and bolts are simple options for fastening two pieces of material together. If you know how to use Taps and Dies you can Fabricate Your Own Threaded Parts.

Checkout this on how to make threads yourself.


Video on Impedance Matching 101

#ImpedanceMatching 101 presentation by Ward Silver, N0AX at Pacificon 2012.

Youtube URL:

A great introduction on methodology and techniques to achieve optimum energy transfer between a electronic circuit source and load. Knowing these fundamentals allows for best system performance. More of Mr. Silver’s work is found monthly in the ARRL QST publication, “Hands-On Radio” column.


Project: How to make DIY variable tuning capacitor

#Project on #HowTo make #DIY variable tuning #capacitor

DIY variable tuning capacitor

For those who enjoy building radio projects, you may have noticed that variable capacitors are not as available as they once were. There was a time when all radio receivers contained at least one, but with the arrival of the varicap diode and frequency synthesizer, the traditional tuning capacitor is difficult to find. With a range of 5 pF to 27 pF, this multi-turn capacitor can be constructed using only six items. View the step by step guide


What is capacitor dielectric constant and How to measure it

What is #capacitor #dielectric constant and How to #measure it


For the makers who need to construct their own capacitors, you must choose a dielectric for it, otherwise known as the material that goes between the plates. One popular material is paraffin wax that is typically used for making candles. Another is resin, an easy to find material often used for automotive body repairs. Read complete article on


Project: Raspberry Pi CNC – and for remote control of your CNC .

#RaspberryPi #CNC Controller is board which can control stepper motors for 3 axis devices (X, Y, Z). It uses Pololu A4988/DRV8825 drivers and can control 2 stepper motors for X axis, 2 stepper motors for Y axis and one stepper motor for Z axis.

Brain of this board is #Arduino Nano with #GRBL firmware. Board can be used separately (controlled by USB on Arduino) or can be used as hat on Raspberry Pi and controlled by UART.

More details on project site and page on