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Screwduino is an Arduino UNO compatible with Screw Terminals and great mounting holes
Screwduino is an Arduino UNO compatible with Screw Terminals and great mounting holes
Screwduino is an Arduino UNO compatible with Screw Terminals and great mounting holes
63 backers pledged $2,252 to help bring this project to life.

About

Screwduino - Arduino compatible w/ screw terminals/mtg holes

$2,252

63

We find most of the approaches to Arduino breadboarding annoying. They work OK if you don't know what you want to make and you just want to mess around, but they are painful when you are ready to really make something useful.

We have spent countless hours soldering simple interconnect wires on prototype shields. They give us exactly what we need/want but why do we have to spend time soldering in yet another connector that doesn't do much more than pinout another connector?

Sensor shields are a pretty decent solution since they pin out everything with a power and ground for each signal, but they can get pretty pricey when you add in the cost of the shield and cabling. Plus they get pretty tall till you have a Processor, Sensor Shield and then the vertical wiring above all that.

Then, we saw a screw shield and it looked like the ideal solution for loose wires and builder frustrations. Easy to connect with just a small screwdriver. No connectors to install for simple wiring but no accommodation for I2C connections. The stackup height has less of the same height problems as a sensor shield. The screw shields got me thinking. It's a great idea, but why add the shield? Why not just take an Arduino design and replace the headers/pins with screw terminals?

Here is the result which we call the Screwduino:

Features

  • Arduino UNO compatible with Arduino UNO bootloader
  • Select UNO in Arduino IDE to download card
  • Card has no USB connector/chip so you need to use an FTDI download cable or FTDI to USB interface for USB (not supplied)
  • You can also download code via ArduinoISP via the ICSP header
  • 4-pin I2C connector for easy attachment of an I2C LCD display and other I2C sensors (like temperature sensors). Beware there are many different I2C pinouts.
  • Added 10K ohm pullup resistors (R3 and R4) from the I2C SDA/SCL to +5V If the user doesn't want the resistors, they can snip them out of the circuit
  • Uses through hole parts so that it is easier to assemble. The sole exception is the voltage regulator which is surface mount for heat transfer
  • 5mm pitch screw terminal blocks.
  • Reset switch.
  • 7-12V DC on standard 2.1mm DC power connector
  • Power selection jumper (FTDI, Regulator, Screw Terminals)
  • Four (4) good mounting holes that use 4-40 screws and have more than enough clearance for screw heads, standoffs and/or nuts.
Screwduino (mounted on 3D printed base with FTDI card  not included in this Kickstarter)
Screwduino (mounted on 3D printed base with FTDI card not included in this Kickstarter)

Reverse side shows the pin names.

Rear view showing pin names
Rear view showing pin names

Link to 1:1 scale Screwduino pinout template

Risks and challenges

We've already built several versions of this card so it shouldn't be a big technical challenge. We have done some Kickstarters before and have a good record for delivery on our commitments.

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Questions about this project? Check out the FAQ

Support

  1. Select this reward

    Pledge $1 or more About $1.00

    You appreciate what we are doing and want to help us do projects like this.

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    4 backers
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  2. Select this reward

    Pledge $20 or more About $20

    Early bird backer. Receive a kit of parts to assemble your own Screwduino. The microcontroller comes pre-programmed with the bootloader and running the blink sketch.

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    Ships to Anywhere in the world
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  3. Select this reward

    Pledge $21 or more About $21

    Early bird backer. Receive a kit of parts to assemble your own Screwduino. The microcontroller comes pre-programmed with the bootloader and running the blink sketch.

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    Estimated delivery
    Ships to Anywhere in the world
    1 backer
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  4. Reward no longer available

    Pledge $30 or more About $30

    Receive an assembled an tested Screwduino. The microcontroller comes pre-programmed with the bootloader and running the blink sketch.

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    Estimated delivery
    Ships to Anywhere in the world
    Reward no longer available 25 backers
    $
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  5. Select this reward

    Pledge $32 or more About $32

    Receive an assembled and tested Screwduino. The microcontroller comes pre-programmed with the bootloader and running the blink sketch.

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    Estimated delivery
    Ships to Anywhere in the world
    3 backers
    $
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Funding period

- (30 days)