1. Caffeine Necklace & Earrings – $125.00
Anyone who codes or writes can attest to the brain stimulation power of caffeine–it’s the sort of psychoactive substance that can generate ideas, productivity, and a near-cult following. Surely your girl reveres caffeine, and she’ll love these earrings and matching necklace featuring the molecule form of this powerful substance cast in sterling silver.

2. Diskette Handbag – $60.00
Nothing says “nerdy girl with style” quite like this purse. From a distance it seems as if it’s simply a black purse with silver adornment, but upon getting closer it becomes apparent that there are actually six real floppy disks on each side. And geek appeal aside, girls tend to love purses in general, and even more so, pockets. And this bag has quite an assortment–a few delegated spaces to hold an iPod, cellphone, wallet, and keys with ease, and a large enough interior size to stash a paperback, a collection of loose cosmetics, or a soldering iron and an assortment of flux and de-soldering braid.

3. Multiple Diode Necklace & Earrings – $190.00
A big no-no gift for your techy girlfriend is circuitboard jewelry. While it works fine for notebook covers and business card case faces (as it sort of resembles a non-carbon-based wood grain), as jewelry itself it’s just plain tacky. Opt instead for this elegant necklace that she will adore instead of politely tolerate, featuring multiple-voltage diodes strung together in an almost Art Deco fashion. Plus, until February 13, you’ll get the matching Diode Earrings free.

4. Customizble Dot Matrix Wrist Cuff in Pink – $30.00
If your girl is both on the geeky side with a DIY streak, than this is the perfect project / wrist adornment for her. This thin leather velcro cuff has a grid of perforated dots that your lady can punch out to her heart’s desire to create words in a dot-matrix font, or a pattern, or 8-bit creatures ala Space Invaders. We’ve also supplied some downloadable templates of common geek phrases to generate some ideas [template one] [template two].

5. Varistor Necklace & Earrings – $40.00
These varistors could be mistaken for simple drops of gold were it not for the manufacturer’s marks that give them away as circuit-protecting variable resistors. The leads of each are delicately curled into a loop that attaches with a jump ring to a chain for each instance, making a beautiful, understated jewelry set.

6. Striped Duct Tape Clutch – $20.00
So you’ve bought tickets for two to a formal fund raising dinner for charity a few weeks following the big V-day. Instead of wrapping them in a box she’ll throw out the same day, why not put them both in this striking silver clutch with duct tape accents? She’ll not only look forward to the event, she’ll have a great little clutch to show off as well.

7. Green Resistor Triplets Necklace & Earrings – $120.00
The pretty little descending green drops on this necklace are actually three resistors chained together with their ends wrapped and then threaded onto jump rings. Where each drop meets the necklace chain, it floats in the middle of a hand-formed figure-eight jump ring to prevent tangling. And the matching Green Resistor Triplets Earrings are included for free until Feb. 13.

8. Teal Triple Capacitor Necklace & Earrings – $50.00
Three capacitors in teal joined together at their leads make for an eye-catching pendant on a chain, and the matching earrings featuring a single capacitor each create a look that’s both nerdy and fashionable. And they’re packaged in anti-static bags–a final touch that will make these a joy to receive.

9. Diode Chain Necklace – 26″ & Diode Bracelet – $97.00
Those black “beads” at regular intervals on this trendy necklace are actually 3-amp diodes. Each lead of each diode is curled around a ring, shaped into an “S” curve, and attached to another other via lengths of chain. A single necklace with the Diode Bracelet would make a great gift, but you could also present all three lengths together (18″, 26″ 34″) to make a fabulous layered necklace ($156.00).

10. Nintendo Power Mints – $3.50
Sure, candy and chocolates are pretty much a cliche at Valentine’s day, but what’s far better than just candy is candy in an NES controller. The size and shape of a controller-sans-cord complete with raised buttons, the metal tin can either be given as is, or used as novel packaging for, say, a ring you’ve been waiting to give the geek girl of your dreams…

1. Microcontroller Cufflinks & Tie Tack – $80.00
If your man owns shirts with French cuffs, he desperately needs cufflinks to keep his shirt cuffs from flailing around awkwardly. Why not give him a set of these sophisticated black cufflinks & a tie tack in black and silver? They’re made from real microcontrollers (stripped-down integrated circuits that act as mini-microprocessors), which gives instant geek cred without looking tacky or that he’s trying too hard.

2. Pair of 2″ MIDI Cuffs -$100.00
These geeky rock star cuffs made from Musical Instrument Digital Interface cables are the perfect gift for your boy if he’s a DJ, laptop-or-otherwise musician, programmer punk, or just looks the part. Pick up two in the large size for most men, unless he’s of the rail-thin, heroin-chic sort, then you’re better off with the regular size.

3. Odin’s Rage Watch – $124.00
This sleek LED watch has a futuristic, innovative way for presenting the time. The large dot represents the hour hand on a clock and the small dot the minute. The four dots just above center represent the interim minutes. It’s also available in a black version, and if he likes the rock star cuff look, then the Lightmare Watch, with the same technology but width a wide rubber watch band would be just the thing.

4. Steel Goa Wave Binary Watch – $145.00
Nothing will show off your man’s intellectual prowess better as he decodes the sets of lit LEDs on its steel face into the current time. It’s displayed in binary format, which appears cryptic at first, but if you just add up the values indicated on each row, you’ll get the hours and minutes. Thankfully the lights stay off until a button is pushed, both to keep the battery power conserved and to keep your man from drawing unnecessary attention.

5. Duct Tape Hybrid BiFold Wallet – $25.00
Duct tape is not only incredibly useful (to hold in batteries on the back of a remote with a missing battery cover, hold together the project case of your latest BASIC Stamp prototype, and and keep power and data cables neat and tucked away), it makes a super strong, yet cool looking wallet. And unlike traditional duct tape that can start to peel or leak adhesive onto important pieces of paper, these Ducti wallets use Super Duct Tape that avoids all those problems.

6. Circuitboard Money Clip – $10.00
If your guy has a binder clip he “borrowed” from his office holding together his wad of cash, get him a circuitboard money clip in either green (traditional), blue (shown), or red (bold!).

Since we just love tastefully done circuitboard gear, here’s two more organization-of-slash-on-paper based accessories, the Circuitboard Clipboard and the teeny Circuitboard Memo Pad. Both are available in green, blue or red.

Hex standoffs are generally used to keep circuit boards separate from each other if they are stacked in a housing so that current can’t jump between close components and cause a short (or worse). Similar to the Hex Pendant Necklace, but smaller and on a chain, the Hex Pendant Chain Necklace features five hex standoffs woven together to form a corrugated focal point that reflects light in an eye-catching manner.

A far more understated use of aluminum hex standoffs is the simple pendant necklace on a black cord, the Hex Standoff Necklace. It’s even packaged in a static bag for an authentic electronic-hardware experience.

The geek-chic equivalent to those prevalent black rubber bracelets worn en masse, or those tacky silicone stamped-phrase charity-or-otherwise bracelets is the Terminal Bracelet. At first sight it could be just another black rubber bracelet, but the clasp connection sets its apart and well into the realm of geekery. The ends terminate in mid-gauge wire terminals and a bracelet clasp joins them together. At a mere five bucks, these little bracelets are cheap enough to buy in multiple for a full on geek-bracelet assault. There’s even a matching Terminal Necklace to complete the look, or you can opt for the Terminal Necklace – Segmented.

And for guys who like the look of the Terminal Necklace – Segmented but would prefer a chunkier, more masculine look, there’s the Terminal Necklace – Segmented – 4AWG. With thick rubber wire segments and substantial high-voltage bearing wire terminals at each end, it’s a distinctive necklace that announces your comprehension of electronics as well as style.

Soldering–joining metallic surfaces with molten metal that solidifies as it cools–is absolutely essential for circuit bending, modding, or creating electronic projects from scratch. Since a lot of DIYers are self taught, many have never been taught the correct way to solder, and a bad solder job is not only ugly–it can simply cease to function or even be a fire hazard.

The Make blog’s podcast has an excellent instructional video on soldering and desoldering. [Link]

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A perpetual favorite, these little tins in the shape of Nintendo controllers (sans cord) have mints inside that you can remove and use to hold game cartridges, memory cards, or any collection of small interesting things.