Adafruit – Potentiometer Knob – Soft Touch T18 – Red

Adafruit 2046 Mk01

Adafruit 2046 Mk02

Adafruit 2046 Mk03

Adafruit 2046 Mk04

Adafruit 2046 Mk05

Adafruit: 2046


Oh say can you see
By the knob’s early light…

Sorry – we thought that was clever. And while it wasn’t really, this potentiometer knob definitely is. It’s a ‘soft touch’ T18 knob that works great with our Panel Mount 10K, Panel Mount 1K, and Panel Mount 100K potentiometers. The knob is designed to set directly on the potentiometer’s ridges so it’s an easy & secure fit. It has a nice feel, with a rubbery grip, tweaking it is quite fulfilling.

This is the blue version and it has a nice deep color on the inside with a striking blue line on the outside for great visibility with whatever you’re making. We also carry it in white and red if you’re looking for a variety of colors.

Technical Details

  • Diameter of the top: 11mm / 0.4″
  • Diameter of the base: 15mm / 0.6″
  • Weight: 1g
  • Colour: Red

Don Luc

Adafruit – USB DIY Connector Shell – Type Mini-B Plug

Adafruit 1389 Mk01

Adafruit 1389 Mk02

Adafruit 1389 Mk03

Adafruit 1389 Mk04

Adafruit 1389 Mk05

Adafruit: 1389


Make your own USB connections without slicing apart a USB cable and soldering those thin wires inside. These DIY “USB shells” are available in USB A plug, micro B, mini B and USB A socket.

Each shell comes with a two-part snap plastic shell and a proper connector with easy-to-solder tabs.

Don Luc

Adafruit – Standard LCD 20×4 + Extras – White on Blue

Adafruit 198 Mk01

Adafruit 198 Mk02

Adafruit 198 Mk03

Adafruit: 198


Standard HD44780 LCDs are useful for creating standalone projects.

  • 20 characters wide, 4 rows
  • White text on blue background
  • Connection port is 0.1″ pitch, single row for easy breadboarding and wiring
  • Single LED backlight with a resistor included, you can power it directly from 5V. If it’s too bright for you, it can be dimmed easily with a resistor or PWM and uses much less power than LCD with EL (electroluminescent) backlights
  • Can be fully controlled with only 6 digital lines!
  • Built in character set supports English/Japanese text, see the HD44780 datasheet for the full character set
  • Up to 8 extra characters can be created for custom glyphs or ‘foreign’ language support (like special accents)
  • Comes with necessary contrast potentiometer and strip of header

For more information, check out our detailed step-by-step Arduino+LCD tutorial

We have a generic 20×4 datasheet that has dimensions and pin-locations (the exact model may vary but the pinout, size and protocol information is the same). We also have a HD44780 datasheet with the detailed commands for control.

Don Luc

Adafruit – 20mm Coin Cell Breakout Board (CR2032)

Adafruit 1870 Mk01

Adafruit 1870 Mk02

Adafruit 1870 Mk03

Adafruit 1870 Mk04

Adafruit: 1870


Simple but effective – this breakout board has a CR2032 coin cell battery holder soldered on and 0.1″ pitch breakout pins for easy connecting. Great for powering very low-current projects, or adding a battery backup circuit to a real-time-clock or similar.

Comes with one fully assembled and tested coin cell battery holder and a small stick of 0.1″ header so you can solder it on and plug into a breadboard. Coin cell battery is not included.

Technical Details


  • 23.5mm x 28mm x 1.6mm / 0.9″ x 1.1″ x 0.06″
  • Mounting hole distance: 18mm x 22mm / 0.7″ x 0.9″
  • Weight: 3g

Don Luc

Adafruit – 3 x AAA Battery Holder with On/Off Switch and 2-Pin JST

Adafruit 727 Mk01

Adafruit 727 Mk02

Adafruit 727 Mk03

Adafruit 727 Mk04

Adafruit 727 Mk05

Adafruit 727 Mk06

Adafruit: 727


This battery holder connects 3 AAA batteries together in series for powering all kinds of projects. We spec’d these out because the box is slim, and 3 AAA’s add up to about 3.3-4.5V, a very similar range to Lithium Ion/polymer (Li-Ion) batteries and have an on-off switch. That makes them ideal for use with 3.3V projects that have a 2-pin JST connector meant for one of our Li-Ion/Poly batteries. (Of course, you can’t recharge them like Li-Ion/Polys, so don’t try to plug this into one of our Li-Ion/Poly charger boards!)

Fits any standard AAA battery. When using rechargeable NiMH the output voltage will range from about 3.7V with charged batteries to 2.7V at the end of life with a nominal voltage of 3.6V. When using alkalines, the output will range from 4.6V with new batteries to 3.3V at the end of life with a nominal voltage of about 4.5V

The polarity matches that of our 2-pin JST cable and Li-Ion/Poly batteries. Uses a genuine JST connector so it wont ‘catch and tear’ in JST connectors.

Technical Details

  • Box Dimensions: 2.5″ x 1.45″ x 0.62″
  • Cable: 6″ long, terminated with a genuine JST-PH 2 pin connector

Don Luc

Adafruit – 4-pin JST SM Plug + Receptacle Cable Set

Adafruit 578 Mk01

Adafruit 578 Mk02

Adafruit 578 Mk03

Adafruit 578 Mk04

Adafruit: 578


These 4-wire cables are 15cm long and come as a set, one side has a JST SM type connector plug on the end. The other side has a matching JST SM type receptacle connector. They are good for whenever you have 4 wires you want to be able to plug and unplug. We like the solid and compact nature of these connectors and the latch that keeps the cable from coming apart easily. For more information, check the JST SM connector datasheet

Our digital addressable LED strip and 12mm pixels also come with JST SM connectors and you can use these cables to connect to the input or output port

These cables can be used to connect to either the INPUT or OUTPUT port of our LPD8806 digital addressable LED strip or the INPUT or OUTPUT port of our WS2801 LED Pixels so that you can easily plug it into your Arduino or similar and also connect another strand to the output, or perhaps apply power to the ‘output’ end.

Each order receives one of each connector.

Technical Details

  • JST SM plug + recetacle connector: JST SM connector datasheet
  • 15 cm long wires
  • 4 wires, 22AWG stranded

Don Luc

Adafruit – USB Mini-B Breakout Board

Adafruit 1764 Mk01

Adafruit 1764 Mk02

Adafruit 1764 Mk03

Adafruit: 1764


Simple but effective – this breakout board has a USB Mini-B connector, with all 5 pins broken out. Great for pairing with a microcontroller with USB support, or adding USB 5V power to a project.

Comes with one fully assembled and tested mini B breakout PCB and a small stick of 0.1″ header so you can solder it on and plug into a breadboard.

Technical Details

Dimensions (without 0.1″ header or terminal blocks):

  • Length: 21mm/0.8″
  • Width: 13mm/0.5″
  • Height: 2mm/0.1″
  • Weight: 1.6g

Don Luc

Adafruit – USB/DC Lithium Polymer battery charger 5-12V – 3.7/4.2v cells

Adafruit 280 Mk01

Adafruit 280 Mk02

Adafruit 280 Mk03

Adafruit: 280


Charge your single-cell lithium ion/polymer battery any which way you like with this board. Have a USB connection? No problem, just plug into the miniUSB connector. Only have a wall adapter? Any standard 2.1mm DC adapter which puts out 5 to 12VDC will work fine. If both are plugged in, the charger will automatically choose whichever has the highest voltage.

Other nice things about this charger include multiple LEDs for power & charging status, including a charging LED which will blink when the battery is full. If the charger gets too hot from high-speed charging, it will slow down the charge rate automatically. You can easily adjust the charge rate up to 1.2A or down to 100mA.

For use with Adafruit Lipoly/LiIon batteries only! Other batteries may have different voltage, chemistry, polarity or pinout.

  • Use USB or DC power – 5 to 12V input
  • Charges one single-cell 3.7/4.2v batteries (not for older 3.6/4.1v cells) with constant current/constant voltage
  • Three indicator LEDs – green for Power, orange for charging and red for error
  • Charging LED will blink when the battery is full
  • You don’t have to worry about heat dissipation in the charger, even when plugging in a 12V DC power jack – thermal protection inside will slow down the charge rate to prevent damage
  • 2 JST connections so you can keep the battery plugged in and powering your project
    Terminal block connections galore (if you don’t like JST connectors) just solder in 3.5mm terminal blocks
  • Default charge rate is about 500mA, but you can easily change this by soldering in a through-hole resistor on. The chip can do 100-1200 mA charging
  • Safety timer will stop charging after about 14 hours
  • The chip supports a standard 10K thermistor, which we have stuffed as a standard resistor. You can solder in a thermistor easily
  • Lots of information in the datasheet for the MCP73861
  • Fully assembled, tested and comes with a free JST cable

Technical Details


  • Dimensions: 40mm x 44mm x 13mm (1.6in x 1.7in x 0.5in)
  • Weight: 11.7g ( 0.4oz)

Don Luc

Adafruit – Colorful Round Tactile Button Switch Assortment

Adafruit 1009 Mk01

Adafruit 1009 Mk02

Adafruit 1009 Mk03

Adafruit 1009 Mk04

Adafruit 1009 Mk05

Adafruit: 1009


Little clicky switches are standard input “buttons” on electronic projects. These work best in a PCB but can be used on a solderless breadboard as shown in this tutorial. The pins are normally open (disconnected) and when the button is pressed they are momentarily closed.

These buttons are bigger than the 6mm ones we carry, and come in a pack of 15. Each button comes with a candy-colored round cap that snaps on. You get three of each color– blue, grey, yellow, green, and red. The round plastic button tops affix easily to the tactile switch body.

Assembled button dimensions: 12mm x 12mm x 12mm

Don Luc

Adafruit – PowerBoost 500 Shield – Rechargeable 5V Power Shield

Adafruit 2078 Mk01

Adafruit 2078 Mk02

Adafruit 2078 Mk03

Adafruit 2078 Mk04

Adafruit 2078 Mk05

Adafruit: 2078


What’s a project if it’s trapped on your desk? Now you can take your Arduino anywhere you wish with the PowerBoost shield! This stackable shield goes onto your Arduino and provides a slim rechargeable power pack, with a built in battery charger as well as DC/DC booster.

Compatible with Arduino Uno, Duemilanove, Mega, Leonardo and Due – basically any Arduino-pinout-shaped Arduino as only the GND and 5V pins are used. You can stack shields on top, or stack the PowerBoost on top. Please note that the powerboost does not pass through the ICSP headers (the battery is in the way) so if your stacking shield uses ICSP for data transfer (like the Ethernet Shield), you’ll need to stack the PowerBoost above it!

The PowerBoost shield can run off of any Lithium Ion or Lithium Polymer battery (3.7/4.2V kind) but we suggest our 1200mAh capacity or 2000mAh capacity batteries, both of which fits very nicely in the empty space of the shield. Plug in the battery and recharge it via the microUSB jack. When you’re ready to go, just unplug the Arduino from USB or the wall adapter and it will automatically switch over to shield power.

The onboard boost converter can provide at least 500mA current, and can peak at 1A. There’s an onboard fuse to protect against higher current draws which could damage the boost converter or battery.

The shield comes as a kit of parts, some light soldering is required to attach the stacking headers and switch! Battery is not included, but you can pick one up in the shop (again, we suggest our 1200mAh battery or 2000mAh battery, but you can use any 500mAh+ size you like) There’s even an optional switch. If you choose to solder it in, it will let you turn the shield and Arduino power on/off.

Technical Details

  • Dimensions: 53mm x 69mm x 2mm / 2.1″ x 2.7″ x 0.08″
  • Height w/ JST: 8mm / 0.3″
  • Weight: 12.5g

Don Luc