I believe that kids (and not only kids) that have their hands on electronics, wanted at least once in their lives to make an electronic keylock system for their house or room. When i was a kid, i had bought a Smart Kit Keycode lock system, and i had adapted it on the external door of my house. But this door had already the automatic-release mechanism. I only had to find which wires actuate this mechanism and hook the relay of the kit in parallel to this.
Then, i discovered that making a key-code circuit, is simple, very simple. As a matter of fact, so simple, that i designed this very simple key-code circuit, similar to the one from smart-kit but much better (mine had automatic reset operation when wrong code was entered), which took me only a few hours to design. Not to mention the microcontrollers… But why don’t i have a keycode-lock for my apartment’s door? Simple because it is expensive and needs a great mod on the door or frame.
Servo-Actuated Door Keylock Hack with capacitance touch-pad – [Link]
The servo motor is widely used in model hobbyist such as airplane R/C model for moving the rudder, ailerons, elevators and acceleration control or in the car R/C model for steering and acceleration control. In this tutorial we will learn how to control the servo motor as well as the simple close loop control algorithm for this servo motor.
The servo motor basically is a high quality geared DC motor equipped with electronic circuit for controlling the DC motor rotation direction and position. Currently there are two types of servo motor available on the market, the first one is called standard servo and the other one is called continues servo; standard servo can rotate to maximum (clockwise or counterclockwise) of 120 to 180 degrees while continues servo can rotate up to 360 degrees in both direction.
Basic Servo Motor Controlling with Microchip PIC Microcontroller - [Link]
Simon has created an servo switcher for use on autonomous vehicles. designed to allow manual control if the autonomous controller fails. Using a pic12f683 and 4066 analog switch. source code and board files are available on his website.
Autonomous servo switcher – [Link]
A Gas Water Heater controller built around a netduino-mini, a DS1307 clock and a HiTech HS-6635HB servo. [via]
Gas Water Heater controller built around a netduino-mini, a DS1307 clock and a servo – [Link]
Deddie Lab has two interesting Secret Dice projects. The first one is wooden and the second one is metallic. These dices will open only if the secret code is entered. To enter the code you must tilt the box in the correct ways. When the correct code is entered a servo motor will unlock the box so you can get your reward. [via]
Hide Goodies in a Secret Box – Atmega88 Based – [Link]
Jeremie Boulianne of Calgary came with a unique way to build a linear actuator: [via]
Linear actuation is an elusive and expensive field to get into but I always seem to find a need for it with robots I build. Whether it being to raise a turret or dispense a marker a linear actuator would be so handy.
My proof-of-concept solution (hack) was to create a linear actuator design that is accessible to even electronics enthusiasts on the tightest budget
Deodorant-stick linear actuator – [Link]
This article shows how to convert a servo into and geared motor.
But, you still want the RPMs of a servo without the hassle of the pulsing control. So, you hack the servo and make it a geared motor. Easy! Here’s how…
Turn a Servo Into an Inexpensive Geared Motor – [Link]
This project is a mounting system that adds mechanical tilt control to the iPhone. The unit uses two servo motors to move the iphone on the X and Y axis. The system is controlled by an analog joystick and an Arduino board. It can be used to play accelerometer-based games on the iphone. [via]
iPhone tilt motion controller - [Link]