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!

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...

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.

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.

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 :)

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.

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.

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 :)

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!

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,

Philip | Oct. 14, 2014

High quality, does EXACTLY as advertised, a great component

For HB100 Doppler Speed Sensor - Arduino Compatible

A perfect solution for my arduino project, just apply 5V and you get a square wave output of the dopler shift, and an analog "signal strength" output. It's clean, seems both well designed and constructed. A little software to measure frequency and do some filtering and voila - speed measurement. It's coming from Hong Kong, so may take a few days to get to yah, but overall very well done.