Digital Table Clock - Prototype

Hi guys,
After a long time we managed to acquire one more project for CircuitsInc. This board was designed for a small electronics store which manufactures small electronic devices to be used as office supplies. They gave us the task of designing a PCB for a Digital Clock based on a simple microcontroller.
The first step was to design a Prototype board for testing the system. Later, another version of the board will be designed to miniaturize the device.
Since this is a prototype, the board consists of all through-hole components and a Microcontroller.
The final board is expected to have all SMD components and replace the microcontroller with suitable logic circuits(Flip Flops, Gates, etc.).
So, coming to the features of the board:

• There are 3 sets of 2-digit Seven Segment Displays to display Hours:Minutes:Seconds. 
• There are two tactile buttons to adjust the value of different segments. This idea has been picked up from digital wrist watches.
• There is one tactile switch to reset the clock.
• Atmel's Atmega8 Microcontroller has been implemented.
• A crystal has been implemented for accurate timing. 
• Uses 3 AA batteries to power the clock.
• The seven segment displays are controlled by ICs called 4511N. These are BCD to Seven Segment Display converters with inbuilt latch.

We hope this prototype works well and we get to design the final board.

.

Click here to DOWNLOAD the EAGLE files for this project.

For further queries mail us at admin@circuitsinc.tk

PS: Pull down resistors for the tactile switches wont be required here because they can be setup internally from the code.

Procedure for getting your PCB designed. [UPDATE]

Hi. The following are guidelines for a smooth transaction between us and the customers.

WHAT YOU HAVE TO DO:

1. Send us an email at project@circuitsinc.tk. 
1. Mention clearly your name, location, your status(student, professional) and purpose of the PCB.
2. Send in your circuit description in any digital form. You can even send us photographs of your hand drawn circuits or links to circuit diagrams.

WHAT WE WILL DO FOR YOU:

1. A member of the Circuits Team will get in touch with you within 24 hrs via email and clarify the doubts he/she has.
2. Give us some time depending on the complexity of your circuit.
3. We will then send you the following formats of the PCB via email.
1. GERBER format.
2. Schematic(.sch) and Board(.brd) format (EAGLE files).
3. PNG images of schematic and board.
4. Partslist(List of components) in Excel format(.xls).
4. We then request you to post your reviews on the blog. If you agree we would like to post the project on our blog too.

We guarantee 100% privacy of both identity and project.

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