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

The Splendid Arduino and Parallax RFID Reader

Do you have any interest on the RFID stuff? If you did, then you must grab this chance, as you’re about to create an Arduino and Parallax RFID reader today! By the way, do you know what the meaning of “RFID” is? Well, RFID is the short acronym for “Radio-frequency identification”, where it is an automatic identification method that relies on storing and remotely retrieving data, by using devices called “RFID” tags. Most of the time, the technology requires some extent of cooperation of an RFID reader and an RFID tag. For your information, the RFID tag is basically an object and it can be applied into a product, animal, or person for the purpose of identification. Some of the tags can be easily read from several meters away! The RFID tags mostly contain at least two different parts: An integrated circuit and an antenna. The integrated circuit is responsible for storing and processing information, while the antenna is for receiving and transmitting the signal. The best part about this Arduino and parallax RFID reader is once it has fully… Continue reading

Have Some Fun with 100W VHF/UHF LCD PIC16F88 SWR Meter!

Well, most of you that have been dealing with SWR meter before, you’ll know that the whole process it’s a horrible and boring moment of all. Thus, you labeled the measuring SWR at VHF/UHF frequency was never a fun experience! Most radio newbie will assume that their 50 ohms cable is matching a beam or GP, but the fact is they are completely wrong about it. The SWR meter is a tool that can be used to measure the standing wave ratio in a transmission line and it’s an item of radio equipment, which is to be used to check the quality of the match between the antenna and the transmission line! Although there are many SWR analog meters available in the market, but most of them were very expensive. Take example, a price of a very simple LCD SWR meter can be ranged from $100 to $500, which it’s a way too much for the home hobbyists. Instead of buying those expensive ready made SWR meter, why don’t you spend some times and build your own high quality LCD… Continue reading

Would You Dare To Have a Doorbell Hacking?

You’re bored with the old style doorbell, and like to have a brand new doorbell hacking with the little help of Arduino? Hehe, then you’re now having the chance to develop this fun hacking experience… About the doorbell, it can be either battery operated or mains powered, which need to plug straightly into the wall. No matter what types of doorbell you’re using, just make sure that its on the fine condition. As you can see on the above figure, there are three wires connected to the Arduino board. The red wire is +3V and the black wire is ground. Since the doorbell chime unit usually draws its power from two AA batteries, thus it will get the same three volts from the Arduino too! The short white wire is act as the antenna for wireless reception of the signal from the remote button, and the other longer white wire will complete the circuit to the buzzer! IN this case, the Arduino treats it as an analog signal. As a result, you can use it to drive a transistor to… Continue reading

Making a 10 MHz GPS Locked Reference and Challenge Your Creativity

Do you love to challenge yourself off in the GPS niche? You have a deep interest in the GPS Locked Reference as well? Ok, you might want to keep yourself busy with this 10MHz GPS Locked Reference. Before you’re busy with the project yet, you need to check up the system requirements first: A voltage 10Mhz crystal oscillator (We want the tunable type); A GPS card (Use for outputs a detailed status message relating to its clock error); An external GPS antenna (for the GPS card purpose). First of all, make sure you only use the 10MHz voltage tuned crystal oscillator, which the frequency is locked to the GPS positioning system clock. We use the Superstar single board OEM GPS receiver for this project. Secondly, we now will replace the internal 10MHz clock on the GPS card. This replacement will take you some time. Then, we use a PIC microcontroller to read the serial error word that transmitted from the GPS card. Remember to have the PIC output an analog tuning voltage to the 10MHz oscillator as well. Finally, we… Continue reading