WYPH Ultrasonic Module HC-SR04 Distance Measuring Ranging Sensor for Arduino UNO for Mega R3 for Mega2560 Duemilanove Nano Robot Pack of 10pcs

I was overjoyed when these came in the mail. They appeared to function well and were reasonably accurate. Everything was fine until I discovered that these sensors will lock up if they are exposed to too much light. situation on the range After some Internet research, I discovered that this is a common HC-related issue. Units of the SR04 type - not only from this manufacturer, but also from a number of other manufacturers. (Find "HC-" on Google) Override range lockup with the SR04. Unfortunately, in the real world, over range situations can happen for a variety of reasons, and locking up is simply not an option for my application. There are ways to work around this flaw, but for the time being, the general consensus appears to be to avoid the HC-. SR04, and make use of the HY- Instead, use SRF05. That is exactly what I intend to do.

Madden Oconnor

| Sep 27, 2021

This HC-model is a hybrid of the HC-model and the HC-model For such a low-cost sensor, the SR04 has performed admirably. There are a slew of these HC-based products on the market. There are at least two different chip layouts for the SR04 on the market (I'm not sure how else to identify them). When triggered too frequently, the "other layout" model has a tendency to lock up or burn out. A group of 20 novice students were unable to destroy even one of these. Expecting too much from a low-cost sensor is unrealistic; they have a limited range and perform best against hard, flat surfaces. Jumpy data is produced by small and/or soft objects. A median filter (if you know where to look for one or how to write one) can help with data consistency. For my next class, I intend to buy another 20.

Blaze Bennett

| Apr 18, 2021

While they work and appear to be accurate enough (for my needs), their maximum range varies greatly from unit to unit. br>br>I've only tried a few so far (out of a batch of 20), but a couple of them hit 2. Others measured to a maximum range of 5 meters, while others measured to a maximum range of three meters. 8m. br>br>I couldn't measure up until the claimed 4 minutes. Distance of 5 meters. br>br>I use these as a backup/addition to motion sensors (presence, leaving room, entering room) to trigger alarms and lights, so this is "good enough. " br>I'm using a sensor that works up to about 20 meters for my outside application, but one unit costs the same as 30 of these.

Bentley Duffy

| Jan 04, 2021

It's great for what it is; it helps the HC- As far as I can tell, SR04 is performing admirably. The only strange thing I noticed was:
- The datasheet claims that you can sense distance by timing the trailing edge of the trigger signal to the rising edge of the echo response, but my testing shows that time is constant regardless of proximity to an object. Not a big deal; sensing by measuring the duration of the echo high works just fine.

Samir Greer

| Feb 21, 2021

We recently purchased SR04 sensors. All of them turned on, so two stars. br>br>These are the lowest-quality HC-cells available. We recently purchased SR04 sensors. The soldering is sloppy, and there is still flux on the through-hole connector. soldering joint with holes There is insufficient solder on the surface-mounted components. br>br>These devices do not have the same level of measurement accuracy as other HC-based devices. We bought SR04 sensors from a different supplier. These devices can only work at 5 volts. They are unable to work with the number three. Power supply of 3 volts.

Edison Kane

| Jun 18, 2021

Never in a million years did I think I'd say something like this about a mass-produced product. a per-made in China product with a per-made in China product with a per-made The unit price is 4% of name brands, but this is an investment you will not regret. Because of the "amazon effect," I wouldn't normally consider purchasing this: noticing a definite- too- good- true deal, then buying it out of desperation and wasting more money in the end because it doesn't work and you have to buy another one. With this product, however, this is not the case!! All of the units produced results that were on par with well-known brands (such as Ping) - with a minimum distance of less than an inch and high accuracy and consistency Arrived well ahead of the estimated delivery date - Six days was all it took. My only concern is that two of the units had minor dents in their "eyes," but this did not appear to affect their performance in any way. I'd be impressed by the price and quality of this product even if half of them were duds; I can't recommend it highly enough if you're working on a robotics project (like I am) and need a lot of distance sensors without breaking the bank.

Jaxon Griffith

| Aug 01, 2021

I'm having some crazy discrepancies with them at times, and I've seen this mentioned on several message boards. They're very brief, hovering around 30 cm, then jumping up to 60 cm. Backwards and forwards for a total of 100cm. Using moving averages and ignoring outliers, I was able to work around this. It's not difficult to do some averaging with a pack of ten of them. The limited range is a disappointment, but I believe that is due to technology rather than this product.

Addison Olsen

| Jun 16, 2021

Our Arduino Uno robot project in class, which was based on a simple design, did not work with this product. The HC-SunFounder is a hybrid of the SunFounder and the SunFounder The SR04 Ultrasonic Ranging module functioned properly, indicating that the issue was not with the robots. Due to the fact that we only had two SunFounder modules, only two robots were operational. When the WYPH Module was tested to return a signal to the serial port, it needed to be plugged and unplugged several times because it abruptly stopped after a minute or two. I put them all to the test, and they all failed miserably. Purchase this item at your own risk.

Luke KAUR

| Mar 13, 2021