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| Zenni Women's Rectangle Prescription Glasses Purple Plastic Frame |
| $12.95 |
| A plastic full-rim frame. | Zenni Women's Rectangle Prescription Glasses Purple Plastic Frame [Read More] |
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| "Rapid Pack of 5 PCBs for Thermistor Kit" |
| "Rapid Thermistor Temperature Sensor Project Kit - Rapid 70-0240, A pack of 5 high quality printed circuit boards for the Rapid thermistor project kit, 70-0315. PCBs are included with the kits, but are available separately for those who wish to source their own components. Rapid Pack of 5 PCBs for Thermistor Kit"
Price: 10.49 |
| "Rapid Pack of 5 PCBs for Ldr Kit" |
| "Rapid LDR PCB Project Kit - Rapid 70-0250, A pack of 5 high quality printed circuit boards for the Rapid LDR PCB project kit, 70-0245. PCBs are included with the kits, but are available separately for those who wish to source their own components. Rapid Pack of 5 PCBs for Ldr Kit"
Price: 4.99 |
| "Franzis 65293 Alarm System Kit" |
| Franzis-65293-Alarm-System-Kit-Franzis-9783645652933-P-The-Franzis-Alarm-System-kit-detects-intruders-by-measuring-the-slight-variation-in-air-pressure-caused-by-opening-doors-and-windows-This-is-called-volumetric-sensing-and-has-been-used-extensively-in-car-alarms-not-to-be-confused-with-the-vibration-alarms-that-are-also-used-This-type-of-sensing-means-there-are-no-wires-to-route-around-your-house-or-office-just-place-the-alarm-and-switch-it-on-You-can-adjust-the-sensitivity-to-moni
Price: 17.84 |
| "DFRobot SEN0193 Gravity Analog Capacitive Soil Moisture Sensor" |
| "DFRobot Gravity Expansion Shield and Sensors for Arduino - DFRobot SEN0193, This sensor measures soil moisture levels by capacitive sensing, rather than resistive sensing like other common types of moisture sensor. It is made from a corrosion-resistant material giving it a long service life. Simply insert it into the soil and impress your friends with the real-time soil moisture data!The sensor includes an on-board voltage regulator which gives it an operating voltage range of 3.3 to 5.5V. It is compatible with low-voltage MCUs (both 3.3V and 5V logic). To make it compatible with a Raspberry Pi, an ADC converter is required. The sensor is compatible with the DFRobot 3-pin 'Gravity' interface, so it can be directly connected to the Gravity I/O Expansion Shield. DFRobot SEN0193 Gravity Analog Capacitive Soil Moisture Sensor"
Price: 7.51 |
| "DFRobot DFR0300 Gravity: Analog Electrical Conductivity Sensor /Me..." |
| "DFRobot Gravity Expansion Shield and Sensors for Arduino - DFRobot DFR0300, In a liquid, the reciprocal of resistance, the conductivity, is a measure of its ability to conduct electricity. Conductivity is an important parameter of water quality. It can reflect the extent of electrolytes present in water.The DFRobot Gravity: analogue electrical conductivity meter V2 can be used to measure the electrical conductivity of an aqueous solution, and then to evaluate the water quality, which is often used in water culture, aquaculture, environmental water detection and other fields.This upgraded version of the electrical conductivity meter V1, greatly improves the user experience and data precision. It supports 3 to 5V wide voltage input, and is compatible with 5V and 3.3V main control boards. The output signal is filtered by hardware has low jitter; The excitation source adopts an AC signal, which effectively reduces the polarization effect, improves the precision and prolongs the life of the probe; The software library uses the two-point calibration method, and can automatically identify a standard buffer solution, making it simple and convenient.With this sensor, main control board (such as Arduino) and the software library, you can quickly build an electrical conductivity meter, plug and play, with no soldering. Tip: in order to ensure the measurement accuracy, it is strongly recommended to add a temperature sensor to measure the temperature to achieve automatic temperature compensation. DFRobot DFR0300 Gravity: Analog Electrical Conductivity Sensor /Meter V2 (K=1)"
Price: 70.99 |
| "DFRobot SEN0232 Gravity: Analog Sound Level Meter" |
| "DFRobot Gravity Expansion Shield and Sensors for Arduino - DFRobot SEN0232, This Arduino compatible sound level meter (also known as a decibel meter or noise meter) uses sensitive circuitry and a low-noise microphone to enable it to accurately measure the sound level of the surrounding environment. It can be used for environmental noise testing, such as a highway noise monitoring station, bedroom noise monitoring, etc. Nowadays, there are many kinds of sounds surrounding us, some of which are very loud. It is essential to measure whether the sound is noisy enough to do damage to our health.This sound level meter is compatible with Arduino and is plug-and-play with no soldering required. It supports 3.3 to 5.0V input voltage, 0.6 to 2.6V voltage output. The decibel value is linear with the output voltage, which gives a simple conversion, without complex algorithms. DFRobot SEN0232 Gravity: Analog Sound Level Meter"
Price: 38.83 |
| "DFRobot SEN0161-V2 Gravity: Analog pH Sensor/Meter Kit V2" |
| "DFRobot Gravity Expansion Shield and Sensors for Arduino - DFRobot SEN0161-V2, The pH is a value that represents the acidity or alkalinity of a solution. It is also called the hydrogen ion concentration index. The pH is a scale of hydrogen ion activity in a solution. pH has a wide range of uses in medicine, chemistry, and agriculture. Usually, the pH is a number between 0 to 14. Under the thermodynamic standard conditions, pH=7, which means the solution is neutral; a pH<7 means the solution is acidic; a pH>7 means the solution is alkaline.The DFRobot Gravity: Analog pH meter V2 is specifically designed to measure the pH of a solution and reflect the acidity or alkalinity. It is commonly used in various applications such as aquaponics, aquaculture and environmental water testing.As an upgraded version of pH meter V1, this product greatly improves the precision and user experience. The on-board voltage regulator chip supports the wide voltage supply of 3.3 to 5.5V, which is compatible with 5V and 3.3V main control boards. The output signal filtered by hardware has low jitter. The software library adopts the two-point calibration method, and can automatically identify two standard buffer solutions (4.0 and 7.0), making it simple and convenient.With this product, main control board (such as Arduino) and the software library, you can quickly build a pH meter, plug and play, with no soldering. DFRobot SEN0161-V2 Gravity: Analog pH Sensor/Meter Kit V2"
Price: 41.06 |
| "HQ Prop Green 5040 Tri-Blade Bullnose Propeller Set 4" |
| "HQ Prop 5040 Tri-Blade Bullnose Propellers - Sets of 4 - HQ Prop 1433348, A 4-piece set of green-coloured 3-blade bull-nose propellers.3-blade propellers are less efficient than 2-bladed versions but have a greater surface area which means more thrust. Because of this, they are idea for racing where 'grip' in the air is important.The range of other colours available means that you can use them to quickly identify a drone in flight, mix and match so you can easily tell the front from the back when flying line of sight, or just generally look that little bit racier! HQ Prop Green 5040 Tri-Blade Bullnose Propeller Set 4"
Price: 4.52 |
| "Web of Things - Hardware Kit" |
| Web-of-Things-Hardware-Kit-Pi-Supply-PIS-0542-P-Pi-Supply-have-collaborated-with-the-authors-of-Building-the-Web-of-Things-book-to-bring-you-the-WoT-kit-that-contains-all-the-hardware-you-need-to-build-all-the-examples-presented-in-the-book-After-a-broad-introduction-to-the-nuts-and-bolts-of-the-Internet-of-Things-devices-sensors-standards-tools-and-more-Building-the-Web-of-Things-quickly-moves-up-the-protocol-stack-and-focuses-on-the-Web-of-Things-the-Application-Layer-protocol
Price: 17.28 |
| "Reely LiPo Battery Safety Bag" |
| Reely-LiPo-Battery-Safety-Bag-Reely-1461906-P-Lithium-Polymer-LiPo-batteries-should-always-be-charged-and-stored-in-a-safety-bag-P-P-These-safety-bags-from-Reely-are-manufactured-from-fire-retardant-glass-fibre-reinforced-silicone-for-maximum-durability-P-Reely-LiPo-Battery-Safety-Bag
Price: 13.69 |
| "Voltcraft LiPo Battery Charger" |
| Voltcraft-LiPo-Battery-Charger-Voltcraft-1409525-P-The-Voltcraft-V-Charge-Eco-is-a-plug-and-play-charger-for-2-3-and-4S-LiPo-rechargeable-batteries-P-P-Simply-connect-the-battery-via-its-balance-connector-plug-into-the-socket-and-wait-until-the-battery-is-fully-charged-done-It-s-that-easy-P-Voltcraft-LiPo-Battery-Charger
Price: 27.40 |
| "Velleman VM130 2-channel RF Remote Control Set Module - Pre-assembled" |
| Velleman-2-Channel-RF-Remote-Control-Set-Velleman-VM130-p-A-general-purpose-remote-control-set-which-can-be-used-for-controlling-many-different-applications-such-as-garage-doors-garden-lighting-gate-and-door-control-etc-p-Velleman-VM130-2-channel-RF-Remote-Control-Set-Module-Pre-assembled
Price: 47.10 |
| "Velleman MK116 Riding Santa Kit" |
| Velleman-Riding-Santa-Kit-Velleman-MK116-p-This-animated-Riding-Santa-will-make-a-delightful-addition-to-any-seasonal-decoration-or-Christmas-display-BR-BR-iframe-width-420-height-315-src-https-www-youtube-com-embed-GjhPRNQi0kQ-rel-0-frameborder-0-allowfullscreen-iframe-p-Velleman-MK116-Riding-Santa-Kit
Price: 18.88 |
| "Velleman MK101 Flashing LED Sweetheart Kit" |
| Velleman-Flashing-LED-Sweetheart-Kit-Velleman-MK101-p-How-impressed-will-your-sweetheart-be-when-they-realise-you-have-soldered-something-with-love-This-flashing-LED-heart-creates-a-beautifully-romantic-effect-BR-BR-iframe-width-420-height-315-src-https-www-youtube-com-embed-N8KUO9goyyM-rel-0-frameborder-0-allowfullscreen-iframe-p-Velleman-MK101-Flashing-LED-Sweetheart-Kit
Price: 7.60 |
| "Velleman MK103 Sound to Light Unit Kit" |
| Velleman-Sound-to-Light-Unit-Kit-Velleman-MK103-p-The-Sound-to-Light-Unit-from-Velleman-has-four-high-intensity-LEDs-that-light-up-and-react-simultaneously-to-every-sound-ideal-to-indicate-the-ringing-of-a-telephone-or-the-sound-of-a-door-bell-for-the-hard-of-hearing-BR-p-Velleman-MK103-Sound-to-Light-Unit-Kit
Price: 6.32 |
| "Velleman MK104 Electronic Cricket Kit" |
| Velleman-Electronic-Cricket-Kit-Velleman-MK104-p-Create-and-simulate-a-hot-summers-night-with-this-fun-little-cricket-project-br-br-iframe-width-560-height-315-src-www-youtube-com-embed-WB6M_wP99OI-rel-0-frameborder-0-allowfullscreen-iframe-br-br-p-Velleman-MK104-Electronic-Cricket-Kit
Price: 6.36 |
| "Velleman MK106 Metronome Kit" |
| Velleman-MK106-Metronome-Kit-Velleman-MK106-p-The-Velleman-Metronome-Kit-is-a-very-useful-metronome-for-musicians-or-for-any-person-who-needs-a-simple-means-to-keep-a-rhythm-br-br-iframe-width-420-height-315-src-https-www-youtube-com-embed-IBB6Pw1nDKc-rel-0-frameborder-0-allowfullscreen-iframe-br-br-p-Velleman-MK106-Metronome-Kit
Price: 9.13 |
| "Velleman MK107 Running LED Light Kit" |
| Velleman-MK107-Running-LED-Light-Kit-Velleman-MK107-p-The-Running-LED-Light-Kit-from-Velleman-will-produce-a-running-light-effect-while-different-running-light-effects-are-selectable-programme-push-button-br-br-iframe-width-560-height-315-src-https-www-youtube-com-embed-80CvevNFYIY-rel-0-frameborder-0-allowfullscreen-iframe-br-br-p-Velleman-MK107-Running-LED-Light-Kit
Price: 6.47 |
| "Velleman MK108 Water Alarm Kit" |
| Velleman-Water-Alarm-Kit-Velleman-MK108-p-When-this-simple-kit-is-made-up-it-will-give-an-audible-indication-if-water-is-detected-p-Velleman-MK108-Water-Alarm-Kit
Price: 4.52 |
| "Velleman MK109 Electronic Dice Kit" |
| Velleman-MK109-Electronic-Dice-Kit-Velleman-MK109-p-Velleman-s-Electronic-Dice-Kit-from-Velleman-Two-Dice-with-LED-indication-slowly-rolls-to-a-stop-when-the-push-button-is-released-This-dice-kit-can-be-used-as-part-of-a-board-game-and-will-provide-the-players-with-even-more-fun-br-br-iframe-width-560-height-315-src-https-www-youtube-com-embed-RNiz7mDvJ3U-rel-0-frameborder-0-allowfullscreen-iframe-br-br-p-Velleman-MK109-Electronic-Dice-Kit
Price: 5.44 |
| "Velleman MK111 Adjustable Timer and Relay Output Kit" |
| "Velleman Interval Timer with Relay Output - Velleman MK111, The Velleman Interval Timer Kit produces a miniature timer suitable for all applications requiring a delay of up to 60 seconds. It is also available as a pre-mounted module. Velleman MK111 Adjustable Timer and Relay Output Kit"
Price: 4.74 |
| "Velleman MK112 Memory Brain Game Kit" |
| "Velleman MK112 and MK159 Memory Brain Game Electronics Kits - Velleman MK112, The Memory Brain Game Kit from Velleman will provide hours of fun with just 4 LEDs and 4 push buttons - the aim of the game is to repeat a pattern, which is generated at random.This version is supplied without a case. Velleman MK112 Memory Brain Game Kit"
Price: 10.99 |
| "Velleman K8059 Two-channel RF Code Lock Transmitter Kit" |
| Velleman-2-Channel-RF-Code-Lock-Transmitter-Velleman-K8059-p-This-transmitter-will-allow-its-code-to-be-easily-changed-at-any-time-for-security-purposes-Supports-both-continuous-and-burst-transmission-p-Velleman-K8059-Two-channel-RF-Code-Lock-Transmitter-Kit
Price: 11.98 |
| "Velleman MK113 Siren Kit" |
| Velleman-Siren-Sound-Generator-Kit-Velleman-MK113-p-The-siren-kit-from-Velleman-is-a-novel-kit-that-will-generate-4-different-sounds-including-police-siren-fire-brigade-emergency-vehicle-and-machine-gun-BR-p-Velleman-MK113-Siren-Kit
Price: 10.22 |
| "Velleman MK115 Pocket VU Meter Kit" |
| Velleman-MK115-Pocket-VU-Meter-Kit-Velleman-MK115-p-The-Velleman-Pocket-VU-Meter-Kit-is-a-hand-held-audiometer-that-fits-into-your-pocket-allowing-you-to-instantly-visualise-signal-levels-from-a-whole-range-of-different-audio-sources-p-Velleman-MK115-Pocket-VU-Meter-Kit
Price: 5.87 |
| "Velleman K1823 1A Power Supply Kit" |
| "Velleman 1A Power Supply Module - Velleman K1823, The Velleman 1A Power Supply Kit provides a regulated voltage, adjustable between 1.5 and 35V at 1A. It is also available as a pre-assembled module. Velleman K1823 1A Power Supply Kit"
Price: 8.39 |
| "Velleman MK119 Roulette Kit" |
| Velleman-Roulette-Kit-Velleman-MK119-p-The-roulette-kit-from-Velleman-is-just-like-the-real-thing-and-will-be-a-sure-winner-with-you-your-friends-and-relatives-Courtesy-of-37-LEDs-arranged-in-a-circle-and-with-a-push-of-a-button-the-LED-lights-flash-in-a-spinning-sequence-and-where-they-stop-is-anybody-s-guess-see-how-to-make-it-here-br-br-iframe-Width-560-height-315-src-https-www-youtube-com-embed-m5tCw0nzeZk-rel-0-frameborder-0-allowfullscreen-iframe-br-br-p-
Price: 16.55 |
| "Velleman MK120 Infrared Beam Kit" |
| Velleman-Infrared-Light-Beam-Kit-Velleman-MK120-p-The-infrared-beam-kit-from-Velleman-will-produce-an-IR-light-beam-that-can-be-used-to-monitor-a-doorway-a-pathway-an-area-etc-For-the-arrival-or-presence-of-a-person-or-object-br-br-iframe-width-560-height-315-src-https-www-youtube-com-embed-b_o_-pm5Va8-rel-0-frameborder-0-allowfullscreen-iframe-br-br-p-Velleman-MK120-Infrared-Beam-Kit
Price: 8.99 |
| "Velleman MK171 Voice Changer Kit" |
| Velleman-Voice-Changer-Kit-Velleman-MK171-P-The-Voice-Changer-Kit-from-Velleman-is-a-high-quality-kit-that-will-help-to-disguise-your-voice-you-can-add-a-vibration-to-your-voice-like-the-effect-used-to-protect-the-identity-of-crime-victims-and-witnesses-There-are-numerous-ways-of-using-this-superb-kit-change-your-voice-tone-upward-or-downward-or-create-different-voices-to-make-voice-overs-and-voice-dubbing-for-audio-video-clips-BR-P-P-For-help-in-getting-started-watch-the-video-belo
Price: 8.00 |
| "Velleman MK124 Rolling Message Kit" |
| Velleman-Rolling-Message-Kit-Velleman-MK124-p-Create-your-own-moving-message-with-up-to-16-self-definable-characters-the-options-are-many-and-varied-p-Velleman-MK124-Rolling-Message-Kit
Price: 13.81 |
