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Description: Have you ever seen a Weevil? It’s a pretty under-appreciated beetle, so we thought it deserved a kit. Okay, so we just kind of like the name and think it makes a cute board.

The WeevilEye is a through-hole soldering kit designed for the beginner. It has a low parts count so even young kids can easily complete it. Once it’s put together the red LED “eyes” light up brighter or darker according to how much light is getting to the photosensor.

This kit comes with all of the parts you need to build your own WeevilEye as well as an instructional kit card that will guide you through the assembly process. You will need a soldering iron and some solder, an inexpensive choice for the beginner is the 30W Soldering Iron listed below.

Note: Due to the requirements of shipping the battery in this kit, orders may take longer to process and therefore do not qualify for same-day shipping. Sorry for any inconvenience this may cause.

Kit Includes:

  • 1 x WeevilEye PCB
  • 2 x Red LEDs
  • 1 x 47k Ohm Resistor
  • 1 x Miniature Photocell
  • 1 x 20mm Coin Cell Battery Holder
  • 1 x 20mm Coin Cell Battery
  • 1 x 2N3904 Transistor
  • 2 x 220 Ohm Resistors


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Customer Comments

  • Agree about the on-off switch, but the battery does pop out pretty easily. Also, it would have been better if the leads on the battery clip were a tad longer - they just barely came through the holes and the clips on the third hand device weren’t big enough to hold it together during soldering - took another person to do it, but it was a bit awkward.

    Otherwise, my seven-year old granddaughter really enjoyed this and couldn’t have been more proud when she’d finished . She likes keeping it in a red Sparkfun box and slowly opening the lid to show people so the lights are on when you peek in and off when the shadow passes the sensor. Best $10 Christmas gift under the tree. See:

    This was her second soldering project - the first was a simple LED circuit with one of your cycling RGB LEDs and a switch from Radio Shack turned into a bracelet covered with colored instamorph moldable plastic, decorated with beads and baubles. The WeevilEye would have been a bit much for a first project, but she was ready for it after a bit of practice. Soldering the IC on the Simon Says kit looks a bit intimidating for her still, though we’ll get there. Y'all should try to come up with a couple more at this level.

    Thanks for producing/selling this!

  • I got this for my 10 year old son. He really enjoyed building it, and it was a great learning exercise for him.

    I have a suggestion for future revisions: add an on/off switch. The battery will only last a few days otherwise (especially if left in a dark room). I modded the board to include a switch, so he can turn it off to preserve the battery when not in use.

  • if there are some others componment can instead of 2N3904 Transistor?it is not common used.

  • Now, sell a soldering iron with a heat-proof cap to prevent burns, (I got a second degree burn -_-)

  • This is an excellent beginner kit and is a great way to suck kids into the world of electronics. I highly recommend it as a beginner project. But, please add an on/off switch and, even better, the use of more environmentally friendly batteries.

Customer Reviews

4 out of 5

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Fun and easy

This was a great little kit to get started with. I also got one for my son and he really enjoyed it (he’s 16). I wish there were some more kits similar to this or slightly more advanced that we could do to keep the excitement going.

This is great! We love hearing about kids getting into electronics. A couple cool kits that a 16 year old might like would be Bleep Drum Minty Boost Simon Tilt