Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Button Code – single button code entry system using PIC16F628A

Back in my elementary years I was thought how to use Morse Code – that is talking through dots and dashes. “Dot-dot-dot-dash-dash-dash-stop”. I didn’t realize it back then but Morse Code is a form of serial communication, just using a single line to convey information. Button Code runs in a similar idea, just using a single button to key in values that would normally require multiple push buttons, thus completely replacing the entire numeric keypad. The user will input a four digit code using taps to the input button. A PIC16F628A was used to detect the code pattern; it monitors the taps on the button while also giving acknowledge signals to the user  – by using blink of a LED and when the correct code sequence is entered a single pole double throw relay will be activated. The common, normally open and normally closed pins are accessible through an end block connector and can be used to switch thing on and off. It has two operating modes the first is the running mode where it waits for the user input… Continue reading

The Powerful and Stealth Keyless Entry System

Nowadays, the public safety is in red alert, as there are more and more criminal cases happening in worldwide, due to the downturn of economic. In order to protect your family and yourself from become the target of thieves, you should do something and make it quick! Well, maybe the powerful and stealth entry system is the ultimate device that will help to guard your house! For your information, this stealth keyless entry system is based on the AT90S2313 microcontroller, which is a robust solution to a common security problem. Normally, the typical 10-button keyless entry pads that are controlled by numerical entry codes can cause some troubles to the users. Go figure, the dirt from your fingers deposited on the keypad make it extremely easy to determine which keys the previous users have pressed. Well, this creates a Loophole to the thieves to hack into your house! However, you can easily overcome the above problem, by using the stealth keyless entry system. It uses a modified doorbell, which is acting as a hidden entry system. When it pressed by… Continue reading