limpkin

1,516 orders since Apr 30, 2013

Lausanne, VD, Switzerland

Ships from Switzerland.

Custom Work Available

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Overall Rating:

Review Breakdown

Average Ratings

Product: (4.67)

Documentation: (4.12)

Shipping: (4.07)

Communication: (4.31)

All Reviews

Michael | Aug. 3, 2020

Ships from China

For HB100 Doppler Speed Sensor - Arduino Compatible

You say that you ship from Switzerland. So I payed for that. But I received the shipping information that my package will be received from China (Shenzhen). It usually takes much longer for packages to arrive from China. Strictly speaking, it would not be part of the sales contract. I need the sensor, so I'll have to wait. That is annoying. The shipping costs are therefore not conclusive and transparent for me. Especially since half of the order was almost the shipping costs.

Response from limpkin | Aug. 3, 2020

Hello!
We're very sorry you got that impression... in the HB100 product description is mentioned " Shipping will be done from Switzerland or Shenzhen depending on current stock and customer location."

Mohd | March 20, 2020

HQ Product, Fast Shipping, Useful Doc.

For HB100 Doppler Speed Sensor - Arduino Compatible

Hi limpkin,
first of all thank you for fast shipping, but i paid two shipping fee and get it in same box :)

I've question, in CODE you use "19" for HB100 , and for CDM324 use "44" ..

From where you get this constant??

Response from limpkin | March 20, 2020

Hi there!
Could you send me a quick message in private? I'll refund part of your other shipping fee... as this was due to 2 different orders on 2 different stores :).
The different values are because of their different operating frequencies! Have a look here: https://github.com/limpkin/cdm324_backpack/tree/master/datasheets_module

Thanks for your review!

Tanel | Nov. 18, 2019

Very good product for its price

For HB100 Doppler Speed Sensor - Arduino Compatible

I used this sensor in a university project with a group of people not very familiar with electronics and programming and it worked just fine. It is not perfect for measuring speed, but functions well for its price and is relatively easy to use.
Buying experience was excellent - seller answered my questions quickly and product shipped in a speedy manner.

Bernardo | Oct. 31, 2019

Very good!

For HB100 Doppler Speed Sensor - Arduino Compatible

Hello!
The hb100 that I bought you has good reading range. But the sensors that I get here in Argentina, are different and have little reading range, only 2 meters.
For example, yours is "ZH100" and those here are "MX100" or something similar.
Do they change anything?
The screw it brings, what is it for?
Would it serve to adjust the distance of the sensors that I get in my country?

Response from limpkin | Oct. 31, 2019

Hello!
I'm afraid I'm not familiar with these MX100...

Alexander | Dec. 1, 2018

questions about FOUT )

For HB100 Doppler Speed Sensor - Arduino Compatible

Hi... I recently purchased this module for detection moving people in the room.
External view of module is very good, and from VOUT output i have useful signal (>2.5V wheh i moved)
But I have a questions.
1) If I have not moving in room with your sensor, what sighal i have in FOUT ?
I think 0, but i have not null frequency.
2) And you in your speed measure's sample for arduino you connect FOUT to digital input of arduino.
But output FOUT of sensor is analog signal, isn't it ?
Why he is connected to digital input ?

Response from limpkin | Dec. 1, 2018

Hello,
1) You'll see noise on the FOUT output, which is why it is important to make sure that VOUT is relatively high to take into account FOUT.
2) FOUT is digital, VOUT is analog.
Would you modify your text content with a review? Thanks!

Kok | June 28, 2018

Great prodcuct! Works very well!

For HB100 Doppler Speed Sensor - Arduino Compatible

I bought this product for my school project and it works very well. The seller is very helpful and gave me assistance when i faced problems using the product. I am really grateful to him for all his help! Thanks Mentor Mathieu!

Aditya | Dec. 11, 2017

Quick delivery, great communication

For HB100 Doppler Speed Sensor - Arduino Compatible

Ordered on expedited delivery and received it in 4 days which was fantastic. Had it up and running within 5mins of unpacking.

All communications were very quick and helpful. Highly recommend it.

Daniel | Nov. 27, 2017

HB100 Doppler Speed Sensor

For HB100 Doppler Speed Sensor - Arduino Compatible

The sensor work very well . This module is in accordance with the documentation and works correctly. He arrived quickly and in good conditions. I recommend all buyers.

Martin | Aug. 24, 2017

Doppler radar module & interface.

For HB100 Doppler Speed Sensor - Arduino Compatible

Not having the resources to manufacture a suitable interface for the Doppler Radar module myself, this was a welcome surprise when I came across it. It does exactly what I want at a reasonable price.

Cristobal | May 15, 2017

Really fun and practical

For The Whistled - A Whistle Detection Device

Mine took 2 month to arrive thanks to the precious chilean postage service. I had to modify the power supply as the legs didnt properly fit the electric socket but after works like a charm. You need to whistle loud and strong in order to activate it and the dimmer works great!

Joseph | Aug. 31, 2016

Seller should post simple testing code. Works ok, not great

For HB100 Doppler Speed Sensor - Arduino Compatible

Purchase was easy and shipping was very fast with great tracking.
Hooked this up to a breadboard that I also tested the parallax microwave doppler, and another brand from China on. This one had some problems. It sends a continuous signal and doesn't stop, even when there's no motion. I checked the hook up wires to the board and they are correct. Not sure why it's doing this. I used the same exact program and ardiuno uno microprocessor as for the parallax and china models. It might be something in the programming, not sure, but as of right now, I am not able to use this 'tindie' sensor. Hopefully it just needs an adjustment somewhere, maybe in the programming. I did take notice the difference in sensor structure, this one being an HB100 and the other two being GH-719. Not sure if that has anything to do with it.
**It would be extremely helpful if the seller could post some simple testing code for arduino.**

Response from limpkin | Aug. 31, 2016

Hello Joseph,

I'm very sorry about your experience and would have wished you'd have contacted me before to request assistance for your project, as I'd be more than happy to help you.
I'll provide a sample code on this page soon.

Regards,
Mathieu

Rene | Aug. 16, 2016

Good product!

For HB100 Doppler Speed Sensor - Arduino Compatible

I had bought some bare HB100 sensors before, just to see the IF output on a scope. This module, with an amplifier, gives a good understanding of how the output can be actually used and interfaced with a microcontroller.
Many thanks!!

Nigel | July 28, 2016

Overall A Good Board

For HB100 Doppler Speed Sensor - Arduino Compatible

Just interested in seeing how doppler radar works.

Concentrating on the digital output, I certainly see a change if I walk away or toward the unit at different speeds, but I cannot correlate the speed to a 'scope frequency.

Very wary about write microcontroller code for this as things are the moment.

Response from limpkin | July 28, 2016

Hello,

Could you double check your complete setup? You should get the exact same behavior shown in the demonstration video.
Because of the way the Doppler effect works, the only reason for a given output signal frequency is the speed of the object moving in front of the sensor.

Regards

Moritz | June 21, 2016

I love my Mooltipass

For Mooltipass Cards & Holders

The Mooltipass is convenient to use and as safe as it can get. I'm using it every day and it just works. Also, thanks for selling the cards at that price.

Response from limpkin | June 21, 2016

Hello,

Thanks a lot for your review! Please note we're about to launch the Mooltipass Mini, and that your cards will still be compatible with it.

Solène | May 30, 2016

Need help

For HB100 Doppler Speed Sensor - Arduino Compatible

Hello i have read the documentation and i think the high pass filter is to low
I would to make car speed mesurment and the velocity is 60km/h.
Your filter is designed for 72hz?
Thanks for your reply

Response from limpkin | July 12, 2016

Hello,
Actually if the sensor is right in front of the car you'll be able to measure high speeds. Have a look at this web page for reference:
http://www.limpkin.fr/index.php?post/2013/08/09/Making-the-electronics-for-a-%247-USD-doppler-motion-sensor

Regards,
Mathieu

Jean-Luc | May 4, 2016

HB100 breakout board

For HB100 Doppler Speed Sensor - Arduino Compatible

Hello.
Good delivery, good design.
I did not try the module yet.
On the board is written VOUT and FOUT.
I presume that those signals are prop to the speed.
But could somebody tell me if VOUT = 5VDC -----> SPEED (MPH),
or if FOUT = 32 Hz ------> SPEED (MPH) ?
Thanks for your support !
Best regards,

Jean-Luc

Response from limpkin | May 4, 2016

Hello,

Thanks for the review!
Please have a look at the application note: http://www.limpkin.fr/public/HB100/HB100_Microwave_Sensor_Application_Note.pdf

Regards

Flint | Feb. 25, 2016

Awesome little gadget

For The Whistled - A Whistle Detection Device

I ordered multiple boards for this, since I thought my makerspace would like to try it out. The boards work great, checked them with a power supply from a dev board I had on my desk already. The output is PWM'd to allow for dimming, so be aware of this if you want to hook it up to something that only has off/on. I am fortunate to be able to speak to the designer in chat regularly, so we had a discussion on the shipping. He said if you are going to order multiples, send him a note and he'll send you a discount code, so you do not pay the single shipping several times over. Looking forward to hacking this into new projects soon :)

Stefano | Feb. 25, 2016

Well designed, works great

For HB100 Doppler Speed Sensor - Arduino Compatible

This breakout board for the HB100 Doppler sensor is very well designed and works great. It requires a few lines of code to work: nothing difficult, but for beginners this means some investigation about reading frequency from the sensor pin.
The HB100 can easily reveal movement at a distance of 8-10 m, but precise speed measurement is limited to a maximum of 2-3 meters in my experience. I think this is related to the very wide beam pattern: I'm now trying to build a reflector to make it more directional.
Shipping took some time (anyway not too much) because it was coming from China.
Great product, it is worth the investment.

Giulio | Feb. 18, 2016

It works!

For The Whistled - A Whistle Detection Device

Funny! :) it works, everything ok, but it takes a lot to receive, it comes from China, not from Germany.

Response from limpkin | Feb. 18, 2016

Thanks for the review! It'd be actually odd if it came from Germany as I'm located in Switzerland :). The devices are sent from Switzerland or China depending on current stock and destination... I'll edit the product description to reflect that.

Matija | Feb. 14, 2016

Great little gadget

For The Whistled - A Whistle Detection Device

Pretty good gadget. Sometimes gets triggered by mistake, but I control only small light so it doesn't bother me.

Jared | Jan. 29, 2016

Sensor works great -- with great range

For HB100 Doppler Speed Sensor - Arduino Compatible

I have a few HB100s, as well as a Hot Wheels Radar Gun that I've been trying to rig up to an Arduino for a while now. This module made it super easy. The range is pretty decent and the sensitivity is great. Excellent product.

It'd be nice to see some example sketches, but there are a few on github that I've found. Just search hb100.

Jean-Jacques | Dec. 16, 2015

Neat product, well designed and documented :)

For HB100 Doppler Speed Sensor - Arduino Compatible

Nice quality item, well designed, with a nice form factor. Its (online) documentation is pretty good and I must thank its designer for his careful help and advices using this product.
Packaging was just fine.
In short: I would (and already have) recommend this product :)

Anthony | Nov. 27, 2015

Good

For Mooltipass Offline Password Keeper

Does it says on the box, No problems using it with my mac or pc. The guys at work love it as well. The chrome plug-in is great, the setup can get tedious but so does all password stores that you switch to all at once.

Eric | Nov. 7, 2015

Nice board

For ESP8266 Wifi Module Breakout, USB, 3.3V, Prog But.

Does what it says. No documentation by author, but it's self-explanatory. The documentation about the ESP8266-03 can be found on the Internet. There could be a switch to enable programming mode, but this can easily be added manually with the included breadboard.

Micheal | Oct. 29, 2015

No more last pass

For Mooltipass Offline Password Keeper

I've used my mooltipass to migrate away from lastpass. I feel so much happier knowing that I own and control all my passwords again.

The migration was a bit laborious but I understand that members of the community are working a way to import a csv into the mooltipass, one that is done I won't be able to resist recommending this device to everyone

Response from limpkin | Oct. 29, 2015

Thanks for the great review!
The new Mooltipass App that is currently in the beta testing phase will bring lots of new functionalities... one of them indeed is csv import.

Andy | Sept. 8, 2015

I love this thing. My son and I are trying to see who has th

For The Whistled - A Whistle Detection Device

I love this thing! Having a contest to trigger it with our whistling. My daughter found a trigger frequency that she could do vocally. Amazing device. I love it and plan to use it in our halloweend display. Thanks a million !!!!

Response from limpkin | Sept. 8, 2015

Thanks for that great review!
I'm glad your family is having fun with it :)

Larry | Aug. 27, 2015

awesome product but a bit expensive

For Mooltipass Offline Password Keeper

I really like the product but at the price point, it makes it more of a business tool. (how important is the data you are trying to protect?)

Response from limpkin | Aug. 27, 2015

Hello Larry,
In case, we actually offer coupons to the persons who followed our project from the start!
Unit price will also vary depending on ordered quantity.

Jon | Aug. 26, 2015

Mooltipass is a must have!

For Mooltipass Offline Password Keeper

With the dawn of technology and the rise of cloud computing, passwords are quickly becoming insecure. With dictionary attacks that go after your loved ones and interest to crack those easy to remember passwords, and brute force hacks that attack those long and difficult to remember passwords in less than a day, it is becoming more and more necessary to have some form of password store. Keepass however requires you to keep a local file that could get outdated and might not be on your pc. Put it on dropbox? That's like giving all your passwords away for free! Its only a matter of time before its intercepted and cracked. What about one of those fancy online tools like onepassword? They are susceptible to the keeper of the keys problem: the hackers are going straight for the managers because they're an easy target.

So one is left with a concern for what the right answer is. With Mooltipass, you can now store those long passwords (even have the device make them for you) while still keeping them out of the hands of hackers. With a 2 step authentication and self destructing keycards, the Mooltipass is not a device that can simply be brute forced. It has all of the functionality and capability of a full password manager, but can also be used like a keyboard and is easy to bring with you. This device has been amazing to use, and I look forward to working with its api to extend what it is capable of! Review Image

Response from limpkin | Aug. 26, 2015

Wow, thanks for that incredible review!
It does mean a lot to us, especially given that we spent more than a year developing and perfecting a product that we hoped would answer everyone's needs. Don't hesitate to contact us again to send us more feedback and improvement suggestions!

Romero | Aug. 17, 2015

The product is excellent, I was up and running in one minute

For HB100 Doppler Speed Sensor - Arduino Compatible

The product worked as advertised, just connect to your Ardunio uno board. And you ready to go! just wish they would include software specifically designed for the HB100. I used a basic analog read function. Shipping took some time, cause it was coming from overseas,

Jeremy | July 20, 2015

Super fun!

For The Whistled - A Whistle Detection Device

Bought two- one for me, one for a buddy. We are competing for who can come up with the coolest application. Very simple, reliable product. The PWM is an extra bonus. Would totally buy again (and probably will). Shipping is long if you've become accustomed to Amazon prime, but it's pretty standard for Tindie. So order a few, forget you did, and then be delighted!

Josh | July 14, 2015

well done board !

For HB100 Doppler Speed Sensor - Arduino Compatible

I had originally picked up the radar unit but after digging into it a bit; I decided it was too much work for something to play with -- while I haven't done too much with the shield since receiving it, it does make things easier. The documentation (website) has a lot of good information. Shipping was reasonable & received it quickly.
It is a shield well worth the investment!

Sylvain | June 27, 2015

Great!

For ESP8266 Wifi Module Breakout, USB, 3.3V, Prog But.

It's a really great product. Works very well and good design without any electrical contact under the board.

I like it!

Joseph | June 7, 2015

Everything works, but I think the bandwidth is off.

For HB100 Doppler Speed Sensor - Arduino Compatible

First, the unit performs exactly as designed, is well built, shows a high level of professionalism in design and execution. I used it immediately to detect movement in the room. It's sensitive enough to detect a heartbeat up close. It also reacted to rainfall outside the window. So as a detector, it certainly works, although it's difficult to discriminate and determine precisely what is being detected. It also has limited range of about ten feet indoors.

Based on the excellent documentation and product description done by Limpkin, I expected to be able to use this device to detect people moving at about 40 feet away. Unfortunately, the amplifier upper cutoff frequency is set a bit low, so the signal to the detector is already down from maximum gain by quite a bit at 100 Hz. The average person walking at 3.1 mph would generate a Doppler frequency of about 93 Hz. In fact, the signal will vary from about 60 Hz to about 100 Hz over the course of a single step, with additional frequency components at twice those frequencies due to arm and leg motion. With the bandwidth set low, it becomes more difficult to detect people moving at some distance. For this, I believe I will need another amplifier design, and I'll need to use the analog Doppler signal through FFT's to discriminate between people and other moving objects at some distance.

Response from limpkin | June 11, 2015

Hello Joseph,

Thanks a lot for the awesome review. Heartbeat detection is neat idea!
Let me know if you need a hand for this other amplifier design...

John | Jan. 12, 2015

Nice clean signal

For HB100 Doppler Speed Sensor - Arduino Compatible

The module arrived ready to use, just connect 5v and ground, and frequency to pin8 (with the library I used)
and bobs your uncle, the backpack is good quality, soldered to the HB100 making a robust unit.
The signal is very clean, I could have built the example circuit from agilsense website, but I doubt it would be as good,

I bought 2 units as I have a number of projects in mind,

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