little-gem-layout

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    My Layout for the Little Gem guitar amp. Based on the circuit from runoffgroove.com, featured in MAKE Magazine.

    sofie loizou, petethepontiff, mierla, and 24 other people added this photo to their favorites.

    View 11 more comments

    1. JRWILTON 85 months ago | reply

      Darkhorse3353. If you could please take a picture of the top and bottom of your board that would help tremedously. That way I can see how the solder look. You could send me a picture to jrwilton@yahoo.com

    2. cairn_idris 85 months ago | reply

      Wow, I should have been checking on this diagram more regularly!

      @johnransom: You can insert a power switch between the positive output of the battery and where it connects to the board. Imagine cutting the red wire in the diagram above and putting a switch in between your cut.

      @darkhorse3353: I'm glad you figured it out. For future reference, all ICs are numbered the same way. Pin one is marked with a dot or notch and you count the pins as you go counter-clockwise around the chip.

      @JRWILTON: do you possibly have the IC flipped around? Make sure the notch on the IC is in the same orientation as the one in the digram above (it's the little semi-circle on one end of the IC).

      Good luck! I've made several of these now so I know the diagram is right. Feel free to contact me through Flickr if I can help.

    3. JRWILTON 85 months ago | reply

      I got it the right way....could you please label which capacitior and orange thing are what?

    4. cpmpercussion 81 months ago | reply

      thanks for you diagram!

    5. grvoices 77 months ago | reply

      I do not know where I am going wrong. Could I have possibly blown the amp? I would love to send a pic of what I have done if it would help Dont think I can attach one to this. It is exactly like the diagram. HELP!
      I'm a freaking sound designer but this has me stumped.
      grvoices.com

    6. joeval131 76 months ago | reply

      Great layout. even though I am experienced at reading schematic diagrams. This put the icing on the cake. I think that people that are having trouble just don't have experience at soldering such small circuits. I am an old Ham radio operator and it comes secound nature. My best advice is to work under a magnifying glass, and remember, to much heat your done, big glob of solder touching something else your done.
      Thanks

    7. Mevorah 76 months ago | reply

      Hi, I know this is a really late comment, for everyone has probably made ten of these by now, but im having some trouble. The make magazine article was no help at all, although a good starting point. When i saw your image from the forums i went to it and followed the picture exactly. However I just cant get it to work. I really want this thing to work. Especially because i spent $30 already at radioshack for the parts. Please help. I will take some pictures of it and post the link in a view minutes.

    8. Jm7o 73 months ago | reply

      Hello, this is my first attempt at something like this. The speaker I have is 32 ohm, 1watt. Could someone explain what, if any, changes I would need to make to have this speaker work?

      Thank You.

    9. iamhandgun 72 months ago | reply

      Thanks for posting this. It helped the most in trying to figure this thing out. I have posted graphics of mine on both a breadboard and a perfboard. This may help others out as well. I will post photos soon.
      cheers

    10. la_cogburn 52 months ago | reply

      glad i found this pic. thanks a ton for putting this up. being an EE noob, this helped out tremendously. here's a link to the amp i built using a box from a pack of high end football cards, "cigar box". www.flickr.com/photos/23972443@N04/sets/72157623146479314/

    11. mrdoopa58 41 months ago | reply

      im going to try this will iit work as a ipod amp? Do i need the rheostat? thanks alot please help respond

    12. mrdoopa58 41 months ago | reply

      im guessing the guitar plug socket would be replaced with an ipod one?

    13. wicked toad 41 months ago | reply

      caps are- the one from the jack 0.01, the othe orange one is 0.047, small round is 100, and the big on is 220, hope that helps some of you.

    14. juanse04 36 months ago | reply

      podrian colocar la lista de materiales

    15. xhunter911 26 months ago | reply

      this was very simple to build. I have tons of pics and helpful tips email me xhunter911@gmail.com for pics and help

    16. jeremy227 25 months ago | reply

      thanks you saved my life so much easier than the scemetic

    17. febusa08 22 months ago | reply

      can a 500 ohm rheostat be used if possible?thank you

    18. ghisays 18 months ago | reply

      I can't get a 25ohm rhostat... only 300 ohm and up

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