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Author Topic: Arduino suggestions on new Arduino dev board  (Read 712 times)
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Good afternoon everyone. I am currently designing a new board. At first I was going to just make the board for work and use it for something specific (Wireless iButton reader) Instead I am going to make it a dev board that others can use for there own products/projects.

What I have currently so far:

-3.3v Arduino
-FTDI
-BLE 4.0 module
-LIPO charging circuit
-1 Analog pin can monitor 3.7 v battery
-1 Digital pin to Piezo speaker
-Over/Under voltage protection
-Pushbutton turn off/on circuit
-Power LED, Charge LED
-Arduino reset switch


What else would everyone want built into the board? Some options include, temp sensor, current sensor, gyro sensor, RFID/NFC.
The board would have a clip to hold in place a lipo 3.7v 1500mah battery.


Let me know everyone's suggestions! Thanks again.
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Looks like you have about 10 of 20 IO pins tied up already. Better plan for some IO expansion and capability to deal with 5V circuits.
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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The only pins attached are the TX/RX lines, 1 Analog pin and 1 Digital pin right now. All the circuits (Charging circuit/push on/off circuit) are stand alone circuits that do not interface with the arduino in any way.

 As for 5v, I was thinking of adding a 3.3v to 5v converter.
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So you're just going to have a quasi-random selection of components on a board that are not interconnected at all?
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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The point of this is to have a board ready for production. A programmable controller that is both wireless and rechargeable. Adding a temp sensor to a pin or a speaker is dirt cheap and takes 1 pin each. If there are certain components I can attach that people could use in the everyday product, LEDs, sensors etc, the user does not need to make a custom board for there own product, rather they can use my final production board because it will have all the sensors, chips they need and then some for there application.
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I think you'll find instead that folks don't want to pay for stuff they will not use.
I like the approach here
http://yourduino.com/sunshop2/index.php?pg=1&l=product_list&c=5
where you connect in the what the project needs.
Not that I've done that myself, preferring to make a custom board instead, such as this 12-shift register card with Arduino functionality and off-board USB connectivity (remove USB/Serial adapter after programming, for embedded applications, like a score board)

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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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My idea was you could have a Swiss Army knife version of an Arduino chip.  You are basically saying make it as small and modular as possible. I cannot appease anyone with this concept and just make something as small and cheap as possible.
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Appeasing everyone and making it as small and cheap as possible would seem to contradict each other. Unless you are doing a large quantity, the small-lot prices will hurt the unit cost, the NRE charges for pick & place assembly will hurt, the price for a solder mask will hurt, shipping to & from the assembly house will hurt. So many things to consider.
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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Quote
adding a 3.3v to 5v converter.
Which one, the TXB series have a serious limitation, I've not tried others but I'm not convinced there is a universal option for IO pins, and if you add analogue to the mix there definitely isn't.

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Rob
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Since you're going to have an FTDI chip, I'd suggest connecting it to the SPI lines in addition to the Tx/Rx so you could use it as a programmer (FTDI bitbang) and avoid having a bootloader on the chip.
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