Richard | March 26, 2019

Awesome product. Professionally done.

For I2CEncoder V2 Connect multiple encoder on I2C bus

I wanted to spend some time developing and using these “I2CENcoder V2” as designed by DUPPA and available on Tindie.
Conclusion: These are great.

Anyone that has interfaced an encoder to a microprocessor knows that it is somewhat complicated, but worse, a single micro can’t handle may encoders. My goal (which I reached) was to control 24 encoders in 3 rows of eight each with a single microprocessor.

I purchase about 30 units with the RGB encoders and transparent knobs. I had originally ordered black knobs that have a clear circle. I did not like these knobs and Duppa readily replaced them. Thanks. I have found the push switches on each encoder to be very useful. Also, there are two extra i/o pins that could be engaged, but I have yet to use them.

Some soldering is required. Solder pads have to be soldered on each encoder board in order to set the i2c address. The encoders need to be soldered onto the board. I soldered a 2.54 mm male and female header to each board allowing them to be connected. As I wanted a front panel I was concerned about tolerances so I used long pin females giving the connection a bit of “spring” to take up any accumulated differences in the connections. This worked very well. Alternatively, one could directly solder the castellated pins together. I did not think this was a viable solution given the desire for a front panel and the long rows of 8 encoders. As an added benefit, the spring in the connectors let me remove an encoder with only loosening one or two neighboring encoders.

I control the encoders with a Teensy 3.6. Also included in my design is a Nextion 7” color touch-screen display with a resolution of 800 by 480 resolution. Lastly, I added a joystick.

I was a bit concerned (could be unfounded) of having 24 devices on a single i2c bus. The Teensy has three i2c ports so I used a unique port for each of my three rows. Thus, no bus has more than 8 devices on it. I did not try using a single bus.

The colors on my led’s are a bit off with red being too bright. A simple change of a single resistor would fix this problem and I think Duppa is on it.

I have smooth action and I have not experienced any issues with accurate counts.

Duppa ships quickly yet getting from Italy to California took about 2 weeks. Not Duppa’s fault so I give him 5 stars on shipping as well.

Response from DUPPA | March 26, 2019

Thank you a lot for the review!

Francois | March 17, 2019

A really nice product

For I2CEncoder V2 Connect multiple encoder on I2C bus

This product not only solves a real pain but do it in a very thoughtful way.

I must say I just started using it but right now I get that feel where every use cases I can come up with has been though of and there is an option for it already.

Looking forward to finishing my first project with this product and using it again in other projects.

Other thoughts: Couldn't there be a cooperation between the author of this product and Adafruit? I feel this would fit there product line nicely. Also the pcb is already the right color :)

Response from DUPPA | March 18, 2019

Hello,
Thank you for the review!
We have already asked to Adafruit, but unfortunately no answer so far...

Bryan | Feb. 10, 2019

Very nice product, pretty easy to use, Price is execellent!

For I2CEncoder V2 Connect multiple encoder on I2C bus

I am very satisfied with this product. It does everything the description says it does. Compared to a similar product purchased on another vendors website this one was much less expensive and works flawlessly. I had issues with a similar product from another vendor which led me to try this one out. I would recommend this item, and seller to others. I purchased 4 of these and they all work great.

Response from DUPPA | Feb. 10, 2019

Thank you for the review!!

Simon | Jan. 11, 2019

Excellent, much needed type of encoder

For I2CEncoder V2 Connect multiple encoder on I2C bus

I'm very pleased with these I2CEncoders. I bought four to use in a MIDI controller project to use with an ESP8266. I didn't want lots of wires and didn't have enough GPIOs anyway. These encoder boards make adding additional encoders to a project very simple and flexible. The documentation and Arduino examples are great. The cost is worthwhile for the time and complexity saved if you're using more than a single encoder. Thank you!

Response from DUPPA | Jan. 11, 2019

Thank you for the review!!

Roger | Jan. 4, 2019

What a neat little device ... ;)

For I2CEncoder V2 Connect multiple encoder on I2C bus

I bought the RGB encoder and couldn't be happier. It took me a while to get the hang of it (i am no coder), but wow... now i can see all the possibilities!!! The main reason i bought it was to have a "bounceless device" and it sure delivers ... without any additional combersome complex coding. The encoder is used in my PID temperature controller project. It allows me to access several screens and to increase and decrease several parameters (setpoint, output, Auto/manual, kP, ki, KD) all this with "one" encoder. The RGB led feedback is very usefull. This is a keeper.

I originally ordered the regular encoder and i changed my mind and got great customer service. Also shipping was very fast from Italy to Canada.
Thanks
Roger

Response from DUPPA | Jan. 4, 2019

Thank you for the review!!

Emil | Dec. 19, 2018

Great product

For I2CEncoder V2 Connect multiple encoder on I2C bus

All my questions was fast answered on e-mail. (:
Only had the product a day but looks really good.

Response from DUPPA | Jan. 4, 2019

Thank you for the review!!

Jeremy | Dec. 6, 2018

Looks Good, Works Well

For I2CEncoder V2 Connect multiple encoder on I2C bus

Works as advertised, using it in a controller project now, tried it out with an OLED screen earlier. Much easier than trying to read encoder pins using your main microcontroller. The board itself looks sharp in matte black.

Considered giving the documentation a 4, as it's a bit difficult to figure out all the functions. On the other hand, Saimon has been very willing to help as I figured it out, and there is a TON of functionality, so seemed fair to leave it as a 5.

Make sure you don't use libraries from V1 somehow, seems like that tripped me up at one point.

Response from DUPPA | Dec. 7, 2018

Thank you for the review!!

Benoit | Nov. 24, 2018

A really nice and smart product

For I2CEncoder V2 Connect multiple encoder on I2C bus

This product is really what you need if you have lot of encoder on your project.
Saimon is really reactive to answer question and it is working as well as annonced.

Very good

Response from DUPPA | Nov. 29, 2018

Thank you for the review!

Stefan | Aug. 19, 2018

Sweet simple Rotary Encoder

For I2C Encoder: connect rotary encoders on i2c bus

A very neat little roatary encoder!
With the I2C connection, it's super easy to read out the position, no more hassle with reading out the different channels and calculate the direction!
I'm looking forward to revision 2 :)

Response from DUPPA | Sept. 13, 2018

Thank you for the review!!

Bert | June 13, 2018

Great product

For Debug Board USB to RS232 Isolated Serial Converter

Works exactly as intended, and quick shipping. Proper FTDI chip with serial number, so you can distinguish it from other FTDI stuff on your bus.

Response from DUPPA | June 20, 2018

Thanks for the review!

Kim Bay | April 9, 2018

Excellent product

For I2C Encoder: connect rotary encoders on i2c bus

I bought two I2C encoders and implemented one with an AVR and the other one with an Arduino Nano. Very easy to implement due to the excellent documentation.
Both works flawless in my applications.
Highly recommended!

Response from DUPPA | April 9, 2018

Thanks for the comment!

Giacomo | Jan. 14, 2018

quite a nice piece of hardware

For I2C Encoder: connect rotary encoders on i2c bus

The board is neat and easily assembled. It works flawless with wemos mini d1 (base/pro), and survived my soldering skill too!

The documentation is functional but essential, there would be space for a couple more examples but nothing that cannot be worked on.

On top of this there is the communication with Simone. Blazing fast responses and a lot of willingness to help with every little detail, from customization to the shipment. A must.

Response from DUPPA | Feb. 16, 2018

Thanks for the comment!

Phillip | Jan. 2, 2018

Far smaller than expected.

For Debug Board USB to RS232 Isolated Serial Converter

The debug board is far smaller than I'd expected it to be, although the 0.1 in connector should give that away.
It is very well made, and works as expected.
Having a real FTDI chip makes interfacing to all host systems (linux,windows,mac) easy and reliable.

Response from DUPPA | Jan. 3, 2018

Thanks for your review!

Fabio | Dec. 30, 2017

all right thank you

For I2C Encoder: connect rotary encoders on i2c bus

All right you have very beautiful items !
I tell to my friend about your site
Now i wait for my olead display

Response from DUPPA | Dec. 30, 2017

Thanks for the review!

Corneliu | Dec. 28, 2017

Time saver!

For I2C Encoder: connect rotary encoders on i2c bus

Just received the PCBs and started playing with. Shipping was faster than I expected. as a matter of act it took only 3 or 4 days to arrive. It worked fine from the start. Documentation is OK although not complete but Simone responded to my questions within the minute, FANTASTIC support! This little saved me a lot of time and trouble with my current project.
I recommend it!

Response from DUPPA | Dec. 28, 2017

I’m glad i was able to help. Thanks for the review!

Matt | Sept. 30, 2017

Great isolated UART

For Debug Board USB to RS232 Isolated Serial Converter

I purchased several to communicate with microcontrollers in an analog design where the microcontroller's ground was not Earth ground. This converter allows safe communication between the PC and the microcontroller. The product works great, required no setup and was working immediately. Was going to design my own version before I found these. Only complaint is that time from order until receipt in US was over 1 month.

Response from DUPPA | Oct. 9, 2017

Hi, many thanks for your review!
I will update the shipping details according to your feedback.
Simone

Pasquale | Aug. 5, 2017

Top! Very good product, useful to work safely with RS232

For Debug Board USB to RS232 Isolated Serial Converter

I used this product to insulate a serial working a 220VAC always without problems. It is plug and play and worked immediatly, connected it in few seconds to my board on live mains on one side and to PC on the other side without problems! No drivers needed
Really recommend it, the price is low compared to its value!
Thanks!

Response from DUPPA | Feb. 25, 2020

Thank you so much for the review!