• Requires a 5V supply• Constant current drivers for ultra-bright, consistent colour•1/16 step display dimming•I2C interface• Backpack comes with address-selection jumpers so you can connect up to four mini 8x 8's or eight 7-segments • And to view the library please click here to help you get started!• To see Adafruits tutorial showing how to solder, wire & control the display please click here What's better than a single LED? Lots of LEDs! A fun way to make a small display is to use an 8x 8 matrix or a 4-digit 7-segment display. Matrices like these are 'multiplexed'
- so to control 64 LEDs you need 16 pins. That's a lot of pins, & there are driver chips like the MAX7219 that can control a matrix for you but there's a lot of wiring to set up & they take up a ton of space. The matrices use a driver chip that does all the heavy lifting for you: They have a built in clock so they multiplex the display. They use constant-current drivers for ultra-bright, consistent colour (the images above are photographed at the dimmest setting to avoid overloading our camera!), 1/16 step display dimming, all via a simple I2C interface. These 1.2" matrix backpacks come with three address-selection jumpers so you can connect up to eight 1.2" 8x 8's together (or a combination, such as four 1.2" 8x 8's & four 7-segments, etc) on a single I2C bus.
...

• Requires a 5V supply• Constant current drivers for ultra-bright, consistent colour•1/16 step display dimming•I2C interface• Backpack comes with address-selection jumpers so you can connect up to four mini 8x 8's or eight 7-segments • And to view the library please click here to help you get started!• To see Adafruits tutorial showing how to solder, wire & control the display please click here What's better than a single LED? Lots of LEDs! A fun way to make a small display is to use an 8x 8 matrix or a 4-digit 7-segment display. Matrices like these are 'multiplexed'
- so to control 64 LEDs you need 16 pins. That's a lot of pins, & there are driver chips like the MAX7219 that can control a matrix for you but there's a lot of wiring to set up & they take up a ton of space. The matrices use a driver chip that does all the heavy lifting for you: They have a built in clock so they multiplex the display. They use constant-current drivers for ultra-bright, consistent colour (the images above are photographed at the dimmest setting to avoid overloading our camera!), 1/16 step display dimming, all via a simple I2C interface. These 1.2" matrix backpacks come with three address-selection jumpers so you can connect up to eight 1.2" 8x 8's together (or a combination, such as four 1.2" 8x 8's & four 7-segments, etc) on a single I2C bus.
...

•1.8"" diagonal TFT display with 128x 160 colour pixels can display full 18-bit colour• Ultra-low-dropout 3.3V regulator & a 3/5V level shifter built in so its safe to use with 5V Arduinos• Micro SD card holder
- you can easily load full colour bitmaps from a FAT16/FAT32 formatted micro SD card (not included)•5 way navigation switch
- up, down, left, right, select• If you'd like to add the navigation switch, it uses Analog 3•2 white LED backlight, transistor connected• Defaults to 'on' but can be connected to a digital pin for PWM or simply turning off• Comes with header, requires soldering!• Click here to see the detailed tutorial guide• To see the Controller/ Driver datasheet please click here• To see the Display datasheet please click here This lovely little shield is the best way to add a small, colourful & bright display to any project. We took our popular 1.8" TFT breakout board & remixed it into an Arduino shield complete with micro SD card slot & a 5-way joystick navigation switch (with a nice plastic knob)! Since the display uses only 4 pins to communicate & has its own pixel-addressable frame buffer, it can be used easily to add a display & interface without exhausting the memory or pins. The 1.8" display has 128x 160 colour pixels. Unlike the low cost " Nokia 6110" & similar LCD displays, which are CSTN type & thus have poor colour & slow refresh, this display is a true TFT! The TFT driver (ST7735R) can display full 18-bit colour (262, 144 shades!). & the LCD will always come with the same driver chip so there's no worries that your code will not work from one to the other. The shield has the TFT display soldered on (it uses a delicate flex-circuit connector) as well as a ultra-low-dropout 3.3V regulator & a 3/5V level shifter so its safe to use with 5V Arduinos. We also had some space left over so we placed a micro SD card holder (so you can easily load full colour bitmaps from a FAT16/FAT32 formatted micro SD card) & a 5-way navigation switch (left, right, up, down, select). If you just want to display text, shapes, lines, pixels, etc the shield uses pins 13, 11, 10 & 8. If you'd like to add the navigation switch, it uses Analogue 3 (all 5 switches are connected using a clever resistor trick to permit all the switches to share one analogue pin). For the micro SD card, you'll also give up Digital 12 & 4. Comes as a fully assembled & tested shield with the display, micro SD card holder & nav switch with knob as well as a stick of 0.1" header. To finish up & use, you will need to solder on the header onto the shield PCB, a quick 10 minute task.

...

•12-bit precision at 3300 samples/second over I2C• Can be configured as 4 single-ended input channels, or two differential channels•

...

• Works with 3.3V or 5V logic• Control via I2C• For chips that have 3.4 Mbps Fast Mode I2C (Arduino's don't) you can update the Vout at ~200 KHz• Has an EEPROM so it can store an output voltage• Please Click here for the Datasheet• Click here to view the detailed tutorial Your microcontroller probably has an ADC (analogue -> digital converter) but does it have a DAC (digital -> analog converter)??? Now it can! This breakout board features the easy-to-use MCP4725 12-bit DAC. Control it via I2C & send it the value you want it to output, & the VOUT pin will have it. Great for audio / analogue projects, such as when you can't use PWM but need a sine wave or adjustable bias point. We break out the ADDR pin so you can connect two of these DACs on one I2C bus, just tie the ADDR pin of one high to keep it from conflicting. Also included is a 6-pin header, for use in a breadboard. Works with both 3.3V or 5V logic. Some nice extras with this chip: for chips that have 3.4 Mbps Fast Mode I2C (Arduino's don't) you can update the Vout at ~200 KHz. There's an EEPROM so if you write the output voltage, you can 'store it' so if the device is power cycled it will restore that voltage. The output voltage is rail-to-rail & proportional to the power pin so if you run it from 3.3V, the output range is 0-3.3V. If you run it from 5V the output range is 0-5V. ...

•I2C-controlled PWM driver with a built in clock• Works with both Raspberry Pi & Arduino•6 address select pins (up to 62 of these on a single I2C bus
- that's 992 outputs!)• Adjustable frequency PWM up to about 1.6 KHz•12-bit output resolution (about 4us resolution at 60 Hz update rate for servos)• Configurable push-pull or open-drain output• Output enable pin• Click here to find the detailed tutorial guide for Arduino• And to view the Arduino livrary please click here You want to make a cool robot, maybe a hexapod walker, or maybe just a piece of art with a lot of moving parts. Or maybe you want to drive a lot of LEDs with precise PWM output. Then you realize that your microcontroller has a limited number of PWM outputs! What now? You could give up OR you could just get this handy PWM & Servo driver breakout. It's an i 2c-controlled PWM driver with a built in clock. That means that, unlike the TLC5940 family, you do not need to continuously send it signal tying up your microcontroller, its completely free running! It is 5V compliant, which means you can control it from a 3.3V microcontroller & still safely drive up to 6V outputs (this is good for when you want to control white or blue LEDs with 3.4+ forward voltages). 6 address select pins so you can wire up to 62 of these on a single i 2c bus, a total of 992 outputs
- that's a lot of servos or LEDs. Adjustable frequency PWM up to about 1.6 KHz. 12-bit resolution for each output
- for servos, that means about 4us resolution at 60 Hz update rate. Configurable push-pull or open-drain output. Output enable pin to quickly disable all the outputs


...

• There's an I2C-controlled PWM driver with a built in clock• You do not need to continuously send it signal tying up your microcontroller, its completely free running!• It is 5V compliant, which means you can control it from a 3.3V Arduino & still safely drive up to 6V outputs•6 address select pins so you can stack up to 62 of these on a single i 2c bus, a total of 992 outputs
- that's a lot of servos or LEDs• Adjustable frequency PWM up to about 1.6 KHz•12-bit resolution for each output
- for servos, that means about 4us resolution at 60 Hz update rate• Configurable push-pull or open-drain output• Terminal block for power input (or you can use the 0.1"" breakouts on the side)• Reverse polarity protection on the terminal block input• Green & red power-good LEDs•3 pin connectors in groups of 4 so you can plug in 16 servos at once•A spot to place a big capacitor on the V+ line (in case you need it)•220 ohm series resistors on all the output lines to protect them, & to make driving LEDs trivial• Solder jumpers for the 6 address select pins•A lot of extra space remaining? Let's turn it into a prototyping area. You get a 5x 20 proto area for any extra wiring you'd like to add• Click here to view the detailed tutorial guide You want to make a cool Arduino robot, maybe a hexapod walker, or maybe just a piece of art with a lot of moving parts. Or maybe you want to drive a lot of LEDs with precise PWM output. Then you realize that the Arduino has only a few PWM outputs, & maybe those outputs are conflicting with another shield! What now? You could give up OR you could just get our handy PWM & Servo driver shield. It's just like our popular PWM/ Servo Breakout but now Arduino-ready & works with any Arduino that uses shields: Uno, Leo, Mega, ADK, its all good. This product comes with a fully tested & assembled shield as well as 4 pieces of 3x 4 male straight header (for servo/LED plugs), a 2-pin terminal block (for power) & a stick of 0.1" header so you can plug into an Arduino. A little light soldering will be required to assemble & customize the board by attaching the desired headers but it is a 15 minute task that even a beginner can do.

...

•2.2" diagonal true TFT LCD display has 320x 240 colour pixels• The TFT driver can display full 18-bit colour (262, 144 shades!)• Ultra-low-dropout 3.3V regulator & a 3/5V level shifter so you can use it with 3.3V or 5V power & logic• Comes with a micro SD card holder so you can easily load full colour bitmaps from a FAT16/FAT32 formatted micro SD card• Please click here for the detailed graphics library This lovely little display breakout is the best way to add a small, colourful & bright display to any project. Since the display uses 4-wire SPI to communicate & has its own pixel-addressable frame buffer, it can be used with every kind of microcontroller. Even a very small one with low memory & few pins available! The 2.2" display has 320x 240 colour pixels. Unlike the low cost " Nokia 6110" & similar LCD displays, which are CSTN type & thus have poor colour & slow refresh, this display is a true TFT! The TFT driver (ILI9340) can display full 18-bit colour (262, 144 shades!). & the LCD will always come with the same driver chip so there's no worries that your code will not work from one to the other. The breakout has the TFT display soldered on (it uses a delicate flex-circuit connector) as well as a ultra-low-dropout 3.3V regulator & a 3/5V level shifter so you can use it with 3.3V or 5V power & logic. We also had a little space so we placed a micro SD card holder so you can easily load full colour bitmaps from a FAT16/FAT32 formatted micro SD card. ...

• Coin cell holder soldered on• On/off switch•0.1" pitch breakout pins for easy connecting Simple but effective
- this breakout
...

•4 BSS138 FETs with 10K pullups• Works down to 1.8V on the low side, up to 10V on the high side• Designed for I2C, but also works for SPI, TTL Serial, & any other digital interface both uni-directional & bidirectional• Comes with a fully assembled & tested PCB•4 full bidirectional converter lines as well as 2 pieces of 6-pin header you can solder on to plug into a breadboard or perfboard• Click here to check out the BSS138 Datasheet• Click here to see the NXP App note explaining how it works Because the Arduino (and Basic Stamp) are 5V devices, & most modern sensors, displays, flash cards & modes are 3.3V-only, many makers find that they need to perform level shifting/conversion to protect the 3.3V device from 5V. This level shifter board combines the ease-of-use of the bi-directional TXB0108 with an I2C-compatible FET design following NXP's app note. ...