Clock is one of the common electronic gadgets in every household. Honestly, would you ever figure out the life without the existing of clock? Yep, it must be very horrible, isn’t it?

Well, if you want to own a stylish clock, but you’re not decide to buy it from the marketplace, maybe this cool Radio Controlled Clock with Large-sized Display can be a good assistant here.

Let’s go through the project. First thing first, the charged part of this Radio Controlled Clock is comprised with a display circuit, which is making it easy to see using the large-sized 7 segment LED. In addition, an LED matrix is being used for the display of a day of the week.

The even more interesting part is the display is included with a Japanese character (Kanji), which is indicating the seven days in a week!

The PIC16F877 is applied in this project, as it has 40 pins. Latch registers are used to maintain time information for the display. Well, you can make a circuit compact, by included D-FF of the 7-bit x16 circuits on two CPLDs (XC9572-84).

Meanwhile, the PIC16F628 is needed for the circuit to displays a day of the week by the Kanji in the LED matrix. Beside that, PIC16F628 also responsible for suppressing the consumption electric power of the LED too!

You’re get involved with many projects that require to measure the impedance of a component? You couldn’t find the right tool to help you overcome the hassle? Well, in this case, you might want to create a brand new high accuracy digital LC meter.

Digital LC meter, or it also known as the “LCR” meter, is the electronic test equipment, which normally being used to measure the impedance, such as inductance, capacitance and resistance! The digital LC meter started to gain its popularity over the analog type, due to their high accuracy and high input impedance. Some other features like auto zeroing, auto ranging, auto power off and down mode are making the digital LC meter more powerful than the analog LC meter!

This project is based on the PIC16F628 and PIC16F84 base inductance/capacitance, where the measuring range is from 0 to >0.1 uF for capacitance and 0 to >10mH for inductance. The expected accuracy is in between +/- 1% of reading +/- 0.1pF or +/- 10nH.

An LM311 comparator with positive feedback is being used to make a parallel LC oscillator with digital output. By applying the LM311 onto the project, it can oscillate over a wide range of L and C values continuously!

You’re bored with the monotonous temperature meter and want something different or even more fun? Well, instead of complaining, why don’t you spend a couple of hours and create a cute PIC dual temperature meter?

You’re worry that the PIC dual temperature meter is a little bit too over for you? Then, the worry is useless, as this is a very simple to build PIC Temperature meter, which it allow you to measure temperature in two different locations at the same time!

For your information, the meter can be used to display both Celsius and Fahrenheit values. Beside that, it is capable of measuring temperatures from -55 to 125 degrees Celsius (-67 to 257 degrees Fahrenheit) too.

Don’t be fooled by the size of this PIC Dual temperature meter, although it’s somewhat tiny, but it’s a powerful tool that can provide endless possibilities! Thanks to the PIC16F628 microcontroller and 2×16 characters LCD display, where both of these two components act like a small computer that can be customizable!

Meanwhile, the presented PIC temperature meter uses two very exciting DS18S20 1-Wire digital temperature sensors. Unlike regular sensors, where its temperature readings are passed as varying voltage, DS18S20 passes temperature information in a digital format as data.

As a result, this brings many new possibilities and enables to pass temperature information over much longer distances just over a two wires cable.

Overall, this PIC dual temperature meter is a fun and interesting project indeed!

Thermometer is based on PIC16F628 microcontroller which reads temperature data from DS1820 sensor. All three 7 segment indicators are connected to TPIC6B595 shift register.

Registers are able to drain current for LED indicators that are powered from 12V voltage. Temperature sensor is capable to rank values from 0 to 99.5ºC with 0.5ºC accuracy. No negative values (hopefully temperature value won’t drop below zero). Program code is written for CCS C compiler. Great source to learn how to read data through 1-wire and drive powerful 7 segment LED displays.