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Visgence, Inc.

242 orders since Aug 28, 2013

Las Cruces, NM, United States of America

Ships from United States of America.

Custom Work Available

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Overall Rating:

Review Breakdown

5
1 4
3 3
1 2
0 1
0

Average Ratings

Product: (4.60)

Documentation: (3.20)

Shipping: (4.80)

Communication: (4.60)

All Reviews

Christian | July 4, 2024

Works as expected and wasn't too hard to figure out

For Power DAC Shield

I used this with an Arduino Uno R4 Wifi. Since that uses the Renesas chip, I used the digitalWrite method (and not the port mapping method that's recommended with the older Atmel chips), and that worked just fine for my use case. I'm not aware of *any* board out there for any maker-friendly system that can drive a bipolar output at that voltage without a fair amount of finicky EE work. Driving the input of this one with two center-tapped 9V batteries in series (as one of their suggested ways) worked and was easy enough. I'm using a single board at this time but looking to get a second one. It's nice that they thought about how to stack multiple power DAC boards on top of each using the chip-select output if you want multiple independent outputs.

Tip: unless you enjoy soldering (I don't), get the variant with the headers already soldered on.

Josh | July 9, 2021

Very useful board, fills a gap with few other options.

For Power DAC Shield

I needed a 0-10V variable power supply capable of driving 100mA and there are very few other options besides expensive and hard to get lab equipment or rolling your own. These boards fit the bill and saved me a lot of time and expense.

I needed a total of 8 outputs, so ended up adding bodge wires for the extra chip select pins on the top 3 boards.

I also hacked one up for single ended operation. This gives me full 12-bits resolution across a 0-12V range. Instructions are here if anyone else needs this...

https://github.com/bigjosh/Voyant-power-DAC-array#dac-shield-modifications

Sure the code and documentation for this board could be better, but not too hard to figure out.

I just put in an order for my 2nd batch.

Michael | May 27, 2020

High Quality Microprocessor at a Great Price

For ATMega328PU, DIP Package

This is a great value for the three dollars it cost to purchase a microcontroller. Shipping was both quick and free, the seller gave lots of information on the product page, and the product itself was functional and from a name brand. Although the supplier itself does not directly offer documentation it is easy to find online.

Richard | Jan. 27, 2016

Great product.

For MOSFET Switch

I was a bit confused at the operation until they clarified.
You provide the desired voltage to switch on Vcc (e.g., 5 volt, 12 volt, ...) and the ground.
These wires should be sufficient to carry the desired load current.

You provide a switch signal (e.g., 5 volt or 3.3 volt) to the sw signal to close the switch and gnd to open the switch. The LED turns on when switch is closed.

When 5 volt or 3.3 volt are provided, the neg output connection is shorted to ground thereby completing the output circuit.

I wondered what would happen if I applied 110 volt ac. I found that a 150 watt bulb dimmed. No damage though so this product is robust.



Ross | Aug. 13, 2014

Seems like it works ok - Documentation is awful

For Power DAC Shield

With this board you get
1. the board
2. demo code (undocumented)
3. a schematic

It's not a complicated board. But to understand how it works I have to spend time trying to read somebody's undocumented code and then go to the schematic so that I can download the DAC data sheet so I can understand how that works. Why can't somebody from this company just spend an afternoon and write up some basic documentation?

Update-Will look forwards to the additional documentation. Product works as advertised and is very nicely executed.
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Response from Visgence, Inc. | Aug. 13, 2014
Hi Ross,

The Arduino Mega example is a little cleaner than the Uno example, but we'll get to work on them both up so they're easier to follow. We've also added a link to the MCP4921 (DAC IC) datasheet on the main product description page.

Thanks for the feedback, we're always looking to improve!

Michael | June 17, 2014

Looking for a nice and easy DAC solution

For Power DAC Shield

I had originally bought the Arduino Due, in hopes that I could use the output voltage as a control for motor driver circuit. Not in any easy to find documentation, the Due can only go down to 0.5V and only up to 2.7V. This did not meet the requirements I needed for the motor control. I looked online for a cheap solution that was compatable with the arduino code I had already written.

Unfourtunatly, this device does not have a working code example for the Due. The Due uses different interrupts. Once I acquired an Uno, the code worked flawlessly. Thank you for having such an easy to use product. Please look into adding support for the Due. The added speed and memory allows for more robust programs.
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Response from Visgence, Inc. | July 23, 2014
Glad you found the shield easy to use with the Uno. We have recently released a code example for the Arduino Mega, as well. Unfortunately, the shield was designed to run at 5V, but we will look into 3.3V compatibility for a future revision so that it can be used with the Due.

Thanks for the feedback!

-Visgence, Inc.
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