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Old 31 December 2015, 22:34   #1
strim
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I2C adapter for clockport

I'm working on a small I2C adapter for clockport. This will allow connection of all kind of sensors and cool gadgets to Amiga. Sensors (temperature, pressure, acceleration), LCD displays, keypads, whatever else can talk I2C bus protocol.

It's open source just as any other Sakura project
https://github.com/Sakura-IT/akuhei

Prototype PCB pics:
http://c0ff33.net/drop/DSCN6430.JPG
http://c0ff33.net/drop/DSCN6431.JPG
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Old 31 December 2015, 23:16   #2
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Thats damn cool :-)

If you do a run of PCB's i wouldnt mind a couple.
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Old 01 January 2016, 14:49   #3
strim
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There will be production run at some point. This is not assembled yet, some changes to the PCB might still be necessary.

I think that buying a complete device might be more economical (once they are available).
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Old 01 January 2016, 15:35   #4
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Seeing its a I2C controller, just sell a kit.
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Old 01 January 2016, 18:44   #5
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Assembled prototype:
http://c0ff33.net/drop/akuhei-proto-01.jpg
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Old 01 January 2016, 20:02   #6
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fucking cute :-)
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Old 02 January 2016, 20:33   #7
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Nice!! Always thought of developing a GeekPort compatible interface for the clockport but never got too far. This would be awesome for hardware tinkerers like myself!
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Old 02 January 2016, 23:06   #8
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nice work
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Old 09 January 2016, 01:32   #9
strim
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Commencing prototype testing

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Old 09 January 2016, 02:10   #10
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very very nice
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Old 11 February 2016, 22:22   #11
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http://c0ff33.net/drop/P1070615.jpg

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Old 12 February 2016, 08:55   #12
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By the way, are you providing any software support?

Aeons ago in the dark ages i built the ICY (Z2 I2C from M. Boehmer) and used it for some projects in Uni. It came with a i2c.library with source.

My recollection is a bit vague about that but it might be interesting to take a look if its usable to adapt to this card.

Then again, I2C controller. DIY :-)
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Old 12 February 2016, 09:48   #13
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Quote:
Originally Posted by Locutus View Post
It came with a i2c.library with source.
Coincidentally... https://github.com/Sakura-IT/i2clib

I got permission from the author to slap a BSD license on it and further develop it. I will add support for the new controller.

Also here's an example test program that bangs the hardware directly:
https://github.com/Sakura-IT/akuhei-.../src/akutest.c
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Old 12 February 2016, 11:03   #14
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Excellent, I was going to ask whether it would be compatible with already existing APIs, however rare their usage might be.
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Old 27 September 2017, 02:33   #15
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Any joy with I2C ? Did the prototype working and is it any point to purchase PCB and chip ?

I am thinking of start "Home Automation" project on I2C sensors and Amiga and when everything working port this system to Arduino.
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Old 03 October 2017, 11:24   #16
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Quote:
Originally Posted by andrewshahoff View Post
Any joy with I2C ? Did the prototype working and is it any point to purchase PCB and chip ?

I am thinking of start "Home Automation" project on I2C sensors and Amiga and when everything working port this system to Arduino.
I have around 50 of these boards built. Just never got the time to write appropriate software (more useful than test program referenced above). Interested in writing something more useful?
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Old 03 October 2017, 20:19   #17
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Did you finish i2c.library support?
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Old 23 October 2017, 20:43   #18
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Quote:
Originally Posted by strim View Post
I have around 50 of these boards built. Just never got the time to write appropriate software (more useful than test program referenced above). Interested in writing something more useful?
For the beginning I got few PCBs and I2C chips. But in all this downloads , I cannot find the rest of parts I mean paramethrs of capacitors + resistors , as well as voltage stabilizer ( 3 pin ?)

Last edited by andrewshahoff; 23 October 2017 at 21:50.
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Old 24 October 2017, 20:58   #19
strim
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Quote:
Originally Posted by andrewshahoff View Post
For the beginning I got few PCBs and I2C chips. But in all this downloads , I cannot find the rest of parts I mean paramethrs of capacitors + resistors , as well as voltage stabilizer ( 3 pin ?)
I'm pretty sure you could extract this information from KiCad project files, that are available on GitHub. But to save you some time, here it is:

Code:
Clockport connector	J1	Molex 87758-2216	538-87758-2216	THT 2mm	Mouser	1
I2C Controller	U2	NXP PCA9564PW,112	771-PCA9564PW	TSSOP20	Mouser	1
Capacitor 1uF 0603	C1	Murata GRJ188R71E105KE11D	81-GRJ188R71E105KE1D	SMD 0603	Mouser	1
Capacitor 0.1uF 0603	C2-C3	Murata GRJ188R71H104KE11D	81-GRJ188R71H104KE1D	SMD 0603	Mouser	2
3.3V Regulator	U3	TI TLV70233DBVR	595-TLV70233DBVR	SOT-23-5	Mouser	1
Resistor 4.7k	R1-R2	Panasonic ERA-3AED472V	667-ERA-3AED472V	SMD 0603	Mouser	2
I2C Connector	J2	Molex 22-28-8051	538-22-28-8051	THT 2.54mm	Mouser	1
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Old 25 October 2017, 02:01   #20
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Thank you!
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