I don't think so, I'd drop the extra stuff and just go for a standard shield.ĮDIT: I just looked at the price for that CD22M3494 crosspoint switch, it's not too bad but still too much for this I think. In general I like the basic concept but it could very quickly turn into a cluster f*ck with 30 chips that cost 2x the Due and the shield you want to use.Ĭrossroads (aka derekmjenkins!?), you've obviously made a start, any thoughts on doing something? Also I don't think they level shift but at least they should pass the analog.Īs for the analog you can get programmable gain chips or just make your own with opamps.Įither way you need more IO to control this lot, so add 1 or 2 I2C IO expander chips with jumpers to set the address so they don't clash with any shields.

Needs a lot of hardware, in banks of 4, 6, or 8 not so bad.Ī crosspoint switch would be one way to go, you'd need a lot for them and last I looked they were not cheap. Perhaps someone (or the Arduino dev team) can design a shield like the above.īeing able to select/designate individual pins as 5v or 3.3v logic In contrast to resistor/diode-based methods, the above level-translator IC based solution should work bi-directionally, for all signal types (digital I/O, PWM, analog lines, Serial, SPI, I2C), and thus for all shields.Īny thoughts or issues seen regarding this Adapter-Shield approach? To allow separation for routing between the 5V shield lines and the 3.3V Due lines via the level translators, the in-between shield could have either slightly offset headers&sockets, or else surface mount headers on the bottom. This in-between shield would be inserted first into the Due, and on top of the shield would be inserted any arbitrary existent Arduino shield. This IC does 22 channel level translation and costs < US $2 So, how about something like the following:ĭesign an 'in-between shield' with a level translator IC, for example GTL2000 ( ). Since there are numerous existent Arduino shields with 5V signal levels, versus the 3.3V level at which the Arduino Due runs, users would need to have some solution to maintain interfacing compatibility. Why not a voltage selector on the Arduino board? - #19 by CrossRoads - General Electronics - Arduino Forum) (This post is based partly on suggestions by and seen here: 3.3V inputs & outputs - #13 by hiduino - Arduino Due - Arduino Forumģ.3V inputs & outputs - #6 by graynomad - Arduino Due - Arduino Forum

Arduino due shield multisim