KD Circuits

1,475 orders since Aug 16, 2018

Medina, OH, United States of America

Ships from United States of America.

Custom Work Available

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Overall Rating:

Review Breakdown

Average Ratings

Product: (4.68)

Documentation: (4.55)

Shipping: (4.58)

Communication: (4.61)

All Reviews

Benjamin | Dec. 17, 2024

We dont receive the shipment

For Standalone ESP32 Programmer and Test Solution

We purchased these two items on October 1st; more than two months have passed, and they have not arrived. USPS has no information regarding the tracking number: GPSISP0000834994US. We request an immediate refund.

Darrell | Aug. 18, 2022

Perfect solution for me!

For 328 Board - ATMEGA328P Breakout

I am using this board to operate at 16MHz with 3.3V power to communicate with a 3.3V transceiver. This mode of operation saves me a lot of board real estate, and the size is perfect for my application. I highly recommend it! The maker's YouTube video demonstrating 16MHz operation with 3.3V power convinced me! I highly recommend this product.

William | Feb. 18, 2022

Great idea!

For 5pcs - Plug Puller - JST PH 2.0mm (2pin)

I find these to be really handy! While a pair of tweezers with a curved tip will do, these are much more convenient and much less likely to cause collateral damage.

John | Dec. 8, 2021

trigBoard works as expected. More to explore.

For trigBoard - Ultra Low Power ESP32 IoT Platform

I would use it in battery operated IOT projects. It is not cheap but I see gold plated pins and professional soldering. Will buy it again for high-end projects

Trevor | Oct. 14, 2021

Swiss Army Knife for Serial Debugging

For FTDI USB-SERIAL Converter - 5V/3.3V

I've used a handful of different USB-serial convertors over the years as in new product development as an embedded engineer; this is the best converter I've used. I will have something like 20 in my possession here soon. While Amazon has a plethora of devices that generally get the job done, the level of configurability is just not there.

With these devices, the ability to flip easily between 3.3VDC and 5 VDC logic as well as supplying and not supplying power has saved me headaches and allowed for simpler dev and test set ups. It's odd, but about half of my designs have PICs using a 5V supply and the other half is MSP430 and a whole bunch of M0/3/4 core ARM processors. Throwing a serial link or 2 on a board is automatic at this point, and I always have 1+ of these little guys handy.

One last note: if serial converters are understood, then documentation is not necessary. The board itself has enough information on it to pluggin and get chuggin.

Jj | Sept. 2, 2021

Excellent clever product with support to match it 100%

For trigBoard - Ultra Low Power ESP32 IoT Platform

I initially bought a few Trigboards with accessories as an assessment for the requirement at my cabin with no internet and only cell service. I mocked up the Particle BORON cellphone based variation. Once I played around with it a bit I realized I have not tapped into the full potential and that the system works very well. I purchased several more boards and I am putting it all together now. Kevin’s support with my questions has been quick, very helpful and also enthusiastic. His documentation with videos are outstanding. It is clear he enjoys this and want to see his product succeed. Excellent, clever product with support to match it 100%.
I cant wait for the next idea with following project. Well done.

Matthew | April 12, 2021

Great product

For trigBoard - Ultra Low Power ESP32 IoT Platform

I attached the trigboard to my Havahart trap while dealing with a squirrel infestation. The magnetic sensor alerts me when the trap is activated. This minimizes the animal's distress as I can react more quickly. Trigboard works perfectly for this use case and very easy to set up.

Mike | April 5, 2021

Amazing little board.

For trigBoard - Ultra Low Power ESP32 IoT Platform

This is a great little thing designed by Kevin. It works exactly as described and the documentation is very clear. I needed to get in touch with Kevin regarding a query I had and he answered extremely quickly and was very helpful.
I’d recommend this to anyone who is thinking about getting one....or two. Take the plunge, you won’t be disappointed.

Laurens | Nov. 10, 2020

Very happy - works like a charm

For trigBoard - Ultra Low Power ESP32 IoT Platform

I had an idea, looked for a solution to detect water, found the trigboard and ordered it immediately. It was mailed to me the day after and I received it (in Belgium) soon after. So happy already with the service.
Being a complete nitwit in electronics I duly followed the schema on the wiki, and guess what. It works! So very happy indeed.

Paulus | Oct. 30, 2020

All great

For trigBoard - Ultra Low Power ESP32 IoT Platform

Item arrived a bit long, but it is expected because of the current pandemic situation.
The trigboard itself is very well designed and built.

John | Sept. 15, 2020

What is there not to like.

For trigBoard - Ultra Low Power ESP32 IoT Platform

Lowest power consumption on the market. Kevin did a remarkable job with this product. The documentation and web page for configuration are more than any other ESP32 chip out there. The configuration is easy enough for an 8th grader. I am using one of them (3 purchased) to monitor mailbox and another to monitor ejector pump for failure. Would and will buy again.

Kevin | April 29, 2020

I would give this board a "10" if I could.

For trigBoard - Ultra Low Power ESP32 IoT Platform

This is my first excursion into the ESP32 world, so I was a little nervous about programming and configuring the trigBoard. Boy, was that anxiety a waste of time! Since what I wanted was to be notified whenever my mailbox is opened or closed, there were no programming requirements. The firmware on the trigBoard will already do that as is. All I needed to do was mount the magnetic contacts in my mailbox, and configure my wifi information onto the board over Bluetooth. Both were simple and easy. For that reason, I would highly recommend getting the magnetic contacts, battery enclosure, and case at the same time when ordering the board. They are available on the same Tindie site and are inexpensive. Another suggestion is to follow Kevin Darrah's YouTube video with regards to configuration.. I tried different combinations of Windows, browsers, and even my phone's Android. Only Windows10/Chrome/Bluetooth worked successfully. Don't be fooled by using Android to configure the trigBoard. Even though the configuration interface will display on the phone, and it allows you to input all of the information, something gets "mangled" when transferring data to/from the board. All in all, I am very happy with this product, and it works flawlessly.

Tom | March 12, 2020

arived in just couple days

For Cheater Board-ATMEGA328 Breakout and Pinout Helper

Looks like a great PCB the layout ok all the labeling easy to read. Good addition to my work bench.

David | Jan. 4, 2020

Perfect device and best deal on the internet.

For trigBoard - Ultra Low Power ESP32 IoT Platform

If you can't think of 8 different ways to use this board, you aren't trying. This is a versatile device to sense an open circuit and send push notification from a tiny, device powered by a super long lasting battery and an extremely low power device. I have deployed these for gate status, door status, and 120vGFI live or flipped socket status. They work great out of the box but the maker who sells this also makes the firmware available for modification.

Jaemie | Oct. 31, 2019

Awesome

For Cheater Board-ATMEGA328 Breakout and Pinout Helper

Great product, super fast shipping. The only thing I would suggest is to move the ICSP header to be offset (or moved out away from but that would make the board longer) from the end of the 28pin socket so we can get a little bit more access to the end of the socket. With how close the ICSP header is to the socket it makes it difficult to get your chips out even with a chip puller. Im just going to make sure I dont fully seat the chips in these so they will come out easier. I like the labeling on these, I clear coated mine so they wouldn't wear off easy just in case. I made a socket for the crystal to sit in, so I can use these to burn a bootloader for any speed/voltage of the 328. Will definitely be back for more though, freed up some breadboards and some bench space. Thank you.

David | Oct. 14, 2019

A pleasure to use

For trigBoard - Ultra Low Power ESP32 IoT Platform

Been watching Kevin’s videos on YouTube for a while. Grabbed a couple of the trig boards when they became available. Very nice. First one is installed in my mailbox. Second one is waiting for a fun project idea. If you know anything about Arduino, between the videos and the wiki for info, you can’t go wrong with the trig board.

Michael | Oct. 9, 2019

Great little board, really fun!

For trigBoard - Ultra Low Power ESP32 IoT Platform

Great little board, really fun! Great little board, really fun! Great little board, really fun! Great little board, really fun!

Tim | Aug. 7, 2019

Trigboard V7... expectations met

For trigBoard - Ultra Low Power ESP32 IoT Platform

I moved to trigboard Ver 7 to use PushSafer rather than the version 4 Pushbullet notifications.
PushSafer is German internet based service to push notifications. I find it fast and reliable.
From the mailbox to actual use with the preconfigured trigboard load took 15 minutes or less.
As for user configuration the version 7 trigboard is much improved over version 4.

Ethem | Aug. 2, 2019

Amazing Quality

For 328 Board - ATMEGA328P Breakout

Thanks Kevin, The boards have an amazing quality and really fit for purpose for minimalistic designs where you want to add microcontroller to your project.

Ethem | July 19, 2019

Great Quality

For trigBoard - Ultra Low Power ESP32 IoT Platform

Thanks Kevin. Very high Quality boards, excellent work. International shipping was with no problems.

Nemanja | June 20, 2019

works great!

For trigBoard - Ultra Low Power ESP32 IoT Platform

I tried it out and everything was as described in the detailed documentation. it's a great little device!

Tim | June 5, 2019

A high quality serial converter that works very well.

For FTDI USB-SERIAL Converter - 5V/3.3V

I was struggling with a knock off Adriano UNO and other devices to flash ESP8266 boards.
This serial converter is well designed, supported AND from the USA!
A pleasure to use.

Patrick | April 8, 2019

Great device

For trigBoard - Ultra Low Power ESP32 IoT Platform

Works as advertised. Was able to follow the documentation to modify the built-in code to send an HTTPS web request to a Raspberry Pi on my local network instead of the default Push Safer. Who wants to rely on external services anyway?! Hardest part was crimping a JST connector to a magnetic door sensor to connect to the Trigboard.

Philip | March 29, 2019

trigboard

For trigBoard - Ultra Low Power ESP32 IoT Platform

When I find out where they were delivered, I will ask who ever has them what they think of them.

thanks

Response from KD Circuits | Sept. 3, 2019

Hey there, just noticed this review and remembered that your boards did get delivered, so if you can update this review, I'd appreciate it - thanks!

Stuart | Jan. 25, 2019

Excellent little device, and good advice from the creator

For trigBoard - Ultra Low Power ESP32 IoT Platform

I haven't started using it properly, but it works well, after advice from Kevin the designer of this board

Dennis | Jan. 17, 2019

Excellent design and documentation

For trigBoard - Ultra Low Power ESP32 IoT Platform

Great board, designed up run an ESP8266 on a battery, for long periods of time.
Excellent implementation.
All hardware and firmware available for custom tuning for your application needs.
My only wish, is the designer should start selling his Excellent LTC2945 board on Tindie.
Thanks !!!!

John | Jan. 17, 2019

What a cool little product. Perfect for my applications.

For trigBoard - Ultra Low Power ESP32 IoT Platform

I bought two of these to test a monitoring situation I have and now wonder how I'd do this otherwise. It's very clear to me now that will a full charge on a 1000 mAh battery there is no telling how long it'll run before a battery swap will be required. So far they voltage level has not budged after two weeks of use. And I just bought two more. One to let me know when my mail comes and the other on stand by because there will be something else I'll want to track!

James | Jan. 14, 2019

Amazing and well thought out!

For trigBoard - Ultra Low Power ESP32 IoT Platform

The trigBoard is an impressively engineered low power device for your home automation, or IoT projects. I had the board up and running in just a few minutes! I chose a tilt switch to activate the “trigger” and followed the well documented instructions. It was awesome when I received my first push notification on my phone! The documentation, and support is impressive, and the seller responded to a quick question right away. I would recommend this product to any skill level from beginner to engineer.

Ryan | Jan. 13, 2019

Amazing Turn Key esp8266 dev board

For trigBoard - Ultra Low Power ESP32 IoT Platform

Great board with extreme low power connectivity. Highly recommend this hardware. Advanced purchaser knowledge with Arduino and ESP8266 will make this HW even better to use. Highly recommend!

John | Oct. 30, 2018

Great value but a little hard to set up.

For trigBoard - Ultra Low Power ESP32 IoT Platform

This was my first time to set up such a device. The videos and documentation was more for the person who knows the development environment for Arduino type devices. Since I don't know this environment, explaining the buzz words or replacing them with easier to understand language would help. As a retired electrical engineer, I could follow the author's design well for the circuits. What I am less experienced with is the software and APPs. BTW, the PushBullet APP is run by greedy developers.

James | Oct. 28, 2018

Super stingy little board, the way I like it

For trigBoard - Ultra Low Power ESP32 IoT Platform

This little board is amazing. I'm using it in a solar tracking project where I want to send data back to the mothership when an event trips. When not collecting or sending data, I want the project to use very little power and this board lets me do that really easily. I can see that a lot of attention went into the design and the documentation is first class -- really well done and easy to get things up and running. I contacted the developer and he got back to me ASAP. Big Kudos!