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

The Sophisticated Radio Controlled Clock

In the past, the radio controlled clock can only be found in the radio and TV stations, as they normally using it to make sure that key programme junction are hit and the radio/TV news broadcasts exactly at the right time! It’s very difficult to find the radio controlled clock at household, due to its expensive development systems. However, the time has changed and now, the radio controlled clock are available for home hobbyists. Some of you here must be wondered, “How do radio controlled radios work?” Well, radio controlled clock is able to receive regular time and date updates over the air via a constantly broadcast long wave radio signal. Furthermore, radio controlled clocks are very accurate to the second, where they are updated with time information over the air from an atomic clock. They will self-correct, if the clocks go back or forward due to summertime adjustments! In this project, the PIC16F873 is used for the main unit of radio controlled clock, as it can handle and processing the year/month/day/hour/minute/second and a display in the LCD without any… Continue reading

The Remote Display Based on PIC16F873

You’ve probably exposed to many different types of remote display before, but have you ever built the remote display that based on PIC16F873? The PIC16F873 has an asynchronous communication function (USART) and it’s very important for this project. The information that has been setting with the control unit is displayed on the large-sized display installed in the about 10-m left place using the cable. Since the displaying unit is only 25cm height and 40cm width, thus it wasn’t too large in size! The main purpose of this developing this equipment is to inform the people who gather to certain places, such as church, hospital or public library about the number of the hymn/queuing. Hence, the contents to be displayed are only limited to three digit figure. For constructing the LED display, red LEDs with 5mm diameter are used for the displaying of a letter, while the large-sized 7 segment LEDs are used to display the digit. In order to cut off the cost, the LED matrix won’t be used in this project. If you want to make the display can… Continue reading

The Amazing and Stunning Digital Clock

What’s your opinion about digital clock? If you have deep interest on digital clock, then this project is perfectly well tailored for you! This digital clock is slightly different than others, as it’s an Ultra High Accuracy Digital Clock For this project, a PIC16F873 is used as the main heart to control the input-output port. In order to make the circuit becoming even more compact, complex programmable logic device (CPLD) is also being used in this project. Since the building block of a CPLD is the macro cell, it won’t waste too much of space. Furthermore, the characteristic of non-volatility makes the CPLD the best device in modern designs, where it can be used to perform “bootloader” functions before handling over control to other devices that don’t have this capability! There are two important things, where you have to pay attention in this project. Firstly, when the digital clock measuring counts time of 1 second, it can be delayed compared with the correct clock. For your information, 1 second is made by counting 20 miliseconds in 50 times, where it… Continue reading

The Huge LED Display Ultrasonic Range Meter

Have you ever thought of building an ultrasonic range meter before? Oh, you think it’s hard to develop this tool, then you should spend a few minutes and read this on… Frankly, ultrasonic range meter is a PIC-based project, where the heart of this stuff is PIC16F873. The ultrasonic signal, where is always received with the reception sensor is amplified by 1,000 times of voltage with the operational amplifier with two stages. It is 100 times at the first stage and 10 times at the next stage! In general, the positive and negative power supply is being used for the operational amplifier, and the circuit will work with the single power supply of +9V. Some of the parts that needed to make this ultrasonic range meter are: Sturdy case: You can make the case with the acrylic board. Variable resistor: It used to revise the error of the display by the change of temperature. Knob: You have to put it on the variable resistor. Sound horn: It is for the decrease the ultrasonic that being reflected at the thing. AC… Continue reading