Step 5: Assembly

Assembly of the device is fairly straight forward. I tried to make the locations of the parts on the PCB as clear as possible with well labeled silk screens. All you have to do is match the parts to their markings and solder in place.

There are a few parts that you need to be careful with, especially of you're fairly new to electronics.
  1. Make sure that when you're installing the IC socket and the ATmega you matches the notches with the notch outline on the PCB. If you don't, the proper pins won't connect to else where on the board and you're metronome will not work.
  2. The only component that is polarized here is the LED. Make sure that you put the shorter lead of the LED in the whole closest to the outside edge of the board matching the flat edge of the epoxy case to the flat marking on the PCB.
  3. It does not matter which directions your speakers leads are. 
  4. When connecting the battery holder, be sure that he red lead goes in the hole marked V+ and the black lead goes in the hole marked ground.
  5. When inserting the ATmega, you may need to bend the pins so they are perpendicular to the IC's body. To do this safely, lay the ATmega on it's side on a flat surface and use your index fingers on the underside of the body and your thumbs on the top as seen in the photo. Then rock the chip forward to bend all the pins on that side evenly. Do this to both sides.
HI cmonaco3!! <br>Great job! This stuff is awesome... <br> <br>I hope you dont mind if I ask a couple of questions about your device. <br> <br>Can I attach a led strip instead of the speaker and the single led? I want to cover all roof corners of my band practice room so everyone facing any direction can see the leds going on with the beat. <br> <br>Will it need more power than the batteries can supply? Is it difficult to adapt a power supply instead of the batteries? <br> <br>Thanks!!
I have programmed my first atmega :) thanks to you cmonaco3 :) <br>if you have others program, you can post it, it would be great! :) <br> <br>thanks a lot! <br>marC:)
thank you for the .hex file awesome job! i'm just beginning avr i used to do some pic's :) <br> <br>thank you! <br>marC:)
what about the fuse? <br> <br>how to program it using ? : <br>http://www.ebay.ca/itm/130682846209?ssPageName=STRK:MEWNX:IT&amp;_trksid=p3984.m1439.l2649 <br> <br>thank you so much! <br>marC:)
I'm sorry what do you mean by fuse? If you're referring to the fuses on the ATmega, you shouldn't have to worry about them as I'm using it in its default configuration for this project. <br> <br>You're going to have to consult any documentation that comes with that specific programmer, though I suspect it may work with AVRDUDE. Here's a tutorial from Adafruit on using that software: http://www.ladyada.net/learn/avr/avrdude.html
what's the command line for programming this chip? <br> <br>thank you! <br>marC:)
I used AVRDUDE to program the chip. It's a command line utility you can download for free. Please see this tutorial for using it: http://www.ladyada.net/learn/avr/avrdude.html
Hi! Is it possible to have the .hex file and also the 3 7 segment display is a CA or CC ? <br> <br>thank you soo much! :) <br>marC:)
Sorry about not back to you sooner. The hex file should be uploaded and can be downloaded on the software step. The display being used here is common anode.
no documentation comes with this chineese programmer :(( <br> <br>i don't ever know how to connect it.. im into pic microcontroller.. now's day! <br> <br>thank you! <br>marC:)
thank you !
that is absolutely awesome! good job!
Thank you!

About This Instructable


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Bio: A materials scientist gone electrical engineer my hobbies include experimenting with electronics and making fun and interesting things. I rarely know what I'm doing ... More »
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