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# Posts tagged “new products” (Page 4)

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# New products: 5-channel QTR HD reflectance sensor arrays

Posted by Ben on 10 September 2018
Tags: new products

We now have five-sensor versions of our new high-density QTR reflectance sensor arrays. Like the versions already released, these new modules are available in analog and RC configurations and with two different sensor types, so this post covers four new products:

(Medium-density versions with 3 sensors on an 8 mm pitch will be available soon.)

We expect these to be the smallest arrays that still offer independent control of the odd and even emitters, which gives you extra options for detecting light reflected at various angles. For more information on our new QTR sensor family, you can see some of our previous blog post about the versions we have already released:

Don’t forget to get in on our QTR introductory promotion! Be one of the first 100 customers to use coupon code QTRINTRO and get any of these new sensors at half price! (Limit 3 per item per customer.)

# New products: D36V6x step-down regulators

Posted by Jan on 31 August 2018

Wrapping up our new product releases for the month and for the summer is our new D36V6x family of step-down voltage regulators. These small regulator modules support a large input voltage range and are a great alternative to old three-terminal linear voltage regulators that waste a lot of power and get really hot. These new regulators can take an input voltage anywhere from a few tenths of a volt over the set output voltage up through an absolute max of 50 V, and they can deliver up to 600 mA. We have them available in seven fixed voltage options and two adjustable versions:

You might notice that the board for the adjustable version shows a 2010 copyright year (the fixed version is an even smaller board, and we did not fit the year on there). That’s because these new regulators are actually old designs updated with new regulator chips that use the same package and pinout. The older products were our D24V3x and D24V6x families of regulators, which were based on the Texas Instruments LMR14203 and LMR14206 ICs. For the new D36V6x family, we are moving up to the newer LMR16006 regulator. This chip has several exciting new features that we think will make it our favorite general-purpose regulator for many of our products: higher maximum voltage, better low-dropout performance, and better quiescent current.

### Higher maximum voltage

The LMR16006 has a 60 V maximum input voltage, up from the 42 V of the LMR1420x parts. Even 42 V covered most of our typical applications, but it’s not quite enough for 36V nominal applications, which are getting more common. Our more advanced, integrated products such as motor controllers are often limited by some complex part or circuit, such as a motor driver, and we would like the overall operating range of the product not to be reduced by the regulator. Many stepper motor drivers, such as TI’s DRV8825 or the Toshiba TB67S249FTG and TB67S279FTG that we released carriers for in June, support maximum input voltages of 45 or 50 volts. It’s nice not to be limited by your regulator when you are making systems with those kinds of parts.

For our new D36V6x modules, we are limited to the 50 V maximum of the capacitors from Vin to ground. Unfortunately, capacitor options get a lot more restricted (and expensive) once we go beyond 50 V, so we decided to stick with our old boards so that we could continue to offer these regulator modules at a low price while still providing some substantial improvements. We might still make a new board with higher-voltage capacitors for those who would like to make full use of the regulator’s 60 V maximum. (For anyone thinking of just removing the caps and putting on your own external ones, you might also want to change the diode, which is also a 60 V part.)

### Better low-dropout performance

Having a higher maximum input voltage is nice, but often we’re trying to squeeze the most we can out of a dying battery, so it’s nice to have a low dropout, which is the voltage the regulator needs between the input and output. The older LMR1420x parts had an annoying quality of the dropout voltage going up as the load current went down. The newer LMR16006 has a nice, low dropout as the current goes down, so if you don’t need much current, you can get 5 V out with just 5.2 or 5.3 volts in. Here is a comparison of the dropout performance of the old and new regulators:

### Lower quiescent current

The new regulators also have much lower quiescent current, which is the current the regulator uses when it’s just sitting there and your load isn’t drawing anything. On the old regulators, the quiescent current was under 2 mA, and we did not characterize it beyond that. For these new regulators, it’s typically under 200 microamps, ten to twenty times better than the old regulators. I realize it’s not that amazing for modern regulators, but it’s nice to know that your low-cost, general-purpose regulator module isn’t wasting a lot of power.

Even when we put a new chip onto an old circuit board as I have described, we still test and characterize with different parts to get a good overall result. In the case of these regulators, where the circuit is quite simple, this phase of development is much more time consuming than laying out a circuit board. We build and test dozens of prototypes with different inductances, and even though you can’t see it in the pictures, we build the different voltage versions of the regulators with different inductors to get the best performance we can (within a given inductor type and size).

So how about getting a few to have around for general-purpose use on your next project? You can get one for just $3 as part of our introductory promotion using coupon code D36V6XINTRO, limited to the first 100 customers and to three per item (so you could get up to 27 regulators at that price if you get three of each voltage version). It’s always difficult for us to predict which versions will be how popular, so initial stock is limited, but we make these here in Las Vegas, so even if the version you want goes out of stock, you can backorder it with the promotional price, and we should be able to ship within a day or two. # New products: 1- and 31-channel QTR HD reflectance sensor arrays Posted by Jan on 31 August 2018 This week, we released what we expect to be the extremes of our new line of QTR HD reflectance sensor arrays, with two sizes of a single-sensor board on the small end and a massive 31-sensor array for the maximum size. This picture shows the relative sizes of the boards, along with some of the intermediate sizes we have available: We made the two single-sensor sizes because we could make good arguments for each one. Part of the point of doing a single-sensor board is to make it really small, so you can fit it into tight spaces. But “really small” means different things depending on the dimensions you care about. So we have one version that is only 5 mm (0.2") wide, with components on both sides of the PCB, and one version that is 7.5 mm (0.3") wide, with components on just one side. The 7.5 mm wide version is a little thinner and flatter because it doesn’t have parts on one side, can be used with a 3×1, single row connector, and costs slightly less because of the single-sided assembly. As I mentioned in some of my earlier posts (here and here) about this new line of sensor arrays, we are using two sensor types: more economical units we are calling “QTR”, and higher-performance units with lenses that we are calling “QTRX”. The main appeal of the QTRX sensors is that they can give the same readings at much lower IR emitter currents, which can really make a big difference for big sensor arrays. But if you crank up the current in those QTRX sensors, you can also get more distance. We did not do that on the QTRX arrays because the sensor modules leak light out the sides and interfere with each other when they are closely spaced, but with these single-channel boards, we are also making available the QTRX sensors with the higher 30 mA maximum emitter current, which allows for a range of up to about 8 cm (about 3 inches). We are calling these sensors QTRXL. This video (taken with an old camera that does not have as much IR filtering as most newer cameras) shows the IR light leakage around the side of the QTRX sensor module: I should point out that all of these new QTR modules offer variable brightness control by varying the current through the emitter using the control pin. However, if you want to take advantage of the maximum brightness and range, and have several sensors close to each other, you will need some barriers between them to prevent them from blinding each other (or just turn on one emitter at a time). The 31-sensor arrays are huge! Well, at least compared to the tiny single-sensor boards. The routing on those boards is quite complex because adjacent IR emitters are not just wired in series (because we want to have separate even/odd emitter control, plus the alternate density population options I discussed in this post), so we ended up having to go to a 4-layer PCB to route it. This did let us make the vertical dimension a little lower, so the board is just 16.5 mm tall, compared to the 20 mm board height for the versions with 15 and fewer sensors. The 31-channel board is also 0.062" (1.6 mm) thick, compared to the thinner 0.040" (1 mm) boards we use for the lower channel counts. You can compare all the dimensions of the various boards in the detailed dimension diagram (1MB pdf). The sixteen new boards we released this week brings the total available in this new QTR HD product line to 40. You can see the options neatly summarized in the tables below to pick the best array for your application. QTR sensors 2.9 V to 5.5 V; 30 mA max LED current(1); 5 mm optimal range Board width Configuration Max board current(2) Max range Output type Name 1-piece price 5.0 mm 1 sensor (HD) 32 mA 30 mm analog QTR-HD-01A$1.79
RC (digital) QTR-HD-01RC
7.5 mm 1 sensor (MD)
32 mA 30 mm analog QTR-MD-01A $1.61 RC (digital) QTR-MD-01RC 10.2 mm 4 mm × 2 32 mA 30 mm analog QTR-HD-02A$2.12
RC (digital) QTR-HD-02RC
17.0 mm 4 mm × 4
62 mA 40 mm analog QTR-HD-04A $3.26 RC (digital) QTR-HD-04RC 29.0 mm 8 mm × 4 62 mA 40 mm analog QTR-MD-04A$3.44
RC (digital) QTR-MD-04RC
4 mm × 7
125 mA 40 mm analog QTR-HD-07A $5.40 RC (digital) QTR-HD-07RC 61.0 mm 8 mm × 8 125 mA 40 mm analog QTR-MD-08A$6.39
RC (digital) QTR-MD-08RC
4 mm × 15
250 mA 50 mm analog QTR-HD-15A $10.82 RC (digital) QTR-HD-15RC 125.0 mm 4 mm × 31 495 mA 50 mm analog QTR-HD-31A$21.66
RC (digital) QTR-HD-31RC
QTRX sensors
2.9 V to 5.5 V; 3.5 mA max LED current(1); 10 mm optimal range
Board
width
Configuration Max board
current(2)
Max range Output
type
Name 1-piece
price
5.0 mm 1 sensor (HD)
5 mA 30 mm analog QTRX-HD-01A $2.17 RC (digital) QTRX-HD-01RC 7.5 mm 1 sensor (MD) 5 mA 30 mm analog QTRX-MD-01A$1.99
RC (digital) QTRX-MD-01RC
10.2 mm 4 mm × 2
5 mA 30 mm analog QTRX-HD-02A $2.88 RC (digital) QTRX-HD-02RC 17.0 mm 4 mm × 4 9 mA 40 mm analog QTRX-HD-04A$4.78
RC (digital) QTRX-HD-04RC
29.0 mm 8 mm × 4
9 mA 40 mm analog QTRX-MD-04A $4.96 RC (digital) QTRX-MD-04RC 4 mm × 7 17 mA 40 mm analog QTRX-HD-07A$8.06
RC (digital) QTRX-HD-07RC
61.0 mm 8 mm × 8
17 mA 40 mm analog QTRX-MD-08A $9.43 RC (digital) QTRX-MD-08RC 4 mm × 15 34 mA 50 mm analog QTRX-HD-15A$16.52
RC (digital) QTRX-HD-15RC
125.0 mm 4 mm × 31
68 mA 50 mm analog QTRX-HD-31A $33.44 RC (digital) QTRX-HD-31RC QTRXL sensors 2.9 V to 5.5 V; 30 mA max LED current(1); 20 mm optimal range Board width Configuration Max board current(2) Max range Output type Name 1-piece price 5.0 mm 1 sensor (HD) 32 mA 80 mm analog QTRXL-HD-01A$2.17
RC (digital) QTRXL-HD-01RC
7.5 mm 1 sensor (MD)

# New products: U3V70x high-current boost voltage regulators

Posted by Jan on 16 August 2018
Tags: new products

Today we are finally releasing our new U3V70x family of boost regulators, which are now our highest-current boost regulators. (I said “finally” because we have had the boards designed for over six months, but we just finally received the main ICs for our production builds even though I ordered them last year.) Besides supporting the most current of any of our boost regulators, we also have an adjustable version with a multi-turn trimmer potentiometer, which makes setting the output voltage to a particular value much easier than when the whole output voltage range is represented by the 250 degrees or so of a single-turn pot. The regulators operate with input voltages down to 2.9 V, and the adjustable output version can be set to an output in the range of 4.5 V to 20 V. Talking about the current on boost regulators is tricky since it’s so dependent on input and output voltages, so it’s best to just show you a few performance graphs:

For those who don’t need adjustability (that multi-turn pot is expensive!), we offer fixed-voltage versions in six standard voltages:

We can also make customized fixed versions for you with other voltages between 4.5 V and 20 V.

It’s exciting that these new regulators are smaller than what used to be our highest-power boost regulator (the U3V50x family) despite handling more current. One way we kept the size smaller is by using only ceramic capacitors. One consequence of that is that the new regulator outputs are slightly noisier, so if that is important for your application, you might want to add some external capacitors to further smooth out the voltage. The older design also supports a higher maximum output voltage, so if you need more than 20 V, our U3V50F24 fixed 24 V and U3V50AHV adjustable 9 V to 30 V units are still our highest-power options.

As with all our new products this year, we are offering a special introductory promotion. You can get up to three of each version for just \$9 (which is an especially good deal for the adjustable regulator!), limited to the first 100 customers using coupon code U3V70XINTRO.

# New products: QTR HD sensor arrays by student engineering interns

Posted by Matthew H. on 10 August 2018
Tags: new products

Hi everyone! My name is Matthew, and I am one of nine student engineering interns working at Pololu this summer. As I was preparing to head back to MIT for my sophomore year of studying Mechanical Engineering, I was graciously inflicted with the responsibility of announcing our second wave of high-density QTR reflectance sensor arrays. These two- and four-sensor boards, along with all of the other soon-to-be-released QTR sensor arrays, were designed by us student interns. For many of us, these boards were the first we ever routed, so it’s especially exciting to see them be real products going out into the world. While I did not personally lay out any of the boards being released today, we all thoroughly cross-checked each other’s work (the first board I directly routed should be released next week).

Because of their small size, these boards have one LED brightness control pin. All boards with more than four sensors will have separate LED brightness control for odd-numbered and even-numbered LEDs.

As Jan mentioned in the first blog post introducing this line of sensors, each board is available in analog and RC configurations and with two different sensor types. This post therefore covers the release of eight new products:

We have also released an update to our QTR Arduino library for use with these new QTR sensor arrays.

As we have been doing with all our new products this year, we are offering an extra special introductory discount on these boards! The first 100 customers using coupon code QTRINTRO will get half off on up to three of each sensor.

# New linear actuators and Jrk settings files

Posted by Emily on 8 August 2018
Tags: new products

We’ve expanded our line of Glideforce Light-Duty Linear Actuators to now include options with a 10:1 gear ratio. As you might know if you are a long time customer, we’ve carried our light-duty actuators in 20:1 and 5:1 gear ratios for many years. The 20:1 actuators have nice load capabilities, but they’re kind of slow. The 5:1 actuators are speedy, but they can’t push around the larger loads that the 20:1 actuators can. These new 10:1 actuators fall in the middle, offering a great blend of force and speed.

We carry these new actuators in stroke lengths ranging from 2–12 inches and in versions with and without feedback, bringing our total line of light-duty actuators to 28 options.

Actuator
Type
Max
Dynamic
Speed
@ 12 V
Speed
@ 12 V
Current
Draw
@ 12 V
Nominal
Stroke
Length
With
Feedback
Without
Feedback
Light-Duty
(LD) 5:1
15 kgf
[34 lbs]
4.4 cm/s
[1.7″/s]
3.6 cm/s
[1.4″/s]
1.2 A –
3.2 A
4″ LACT4P-12V-05 LACT4-12V-05
12″ LACT12P-12V-05 LACT12-12V-05
Light-Duty
(LD) 10:1
25 kgf
[55 lbs]
2.8 cm/s
[1.1″/s]
2.3 cm/s
[0.9″/s]
1.2 A –
3.2 A
2″ LACT2P-12V-10 LACT2-12V-10
4″ LACT4P-12V-10 LACT4-12V-10
6″ LACT6P-12V-10 LACT6-12V-10
8″ LACT8P-12V-10 LACT8-12V-10
10″ LACT10P-12V-10 LACT10-12V-10
12″ LACT12P-12V-10 LACT12-12V-10
Light-Duty
(LD) 20:1
50 kgf
[110 lbs]
1.5 cm/s
[0.57″/s]
1.2 cm/s
[0.48″/s]
1.2 A –
3.2 A
2″ LACT2P-12V-20 LACT2-12V-20
4″ LACT4P-12V-20 LACT4-12V-20
6″ LACT6P-12V-20 LACT6-12V-20
8″ LACT8P-12V-20 LACT8-12V-20
10″ LACT10P-12V-20 LACT10-12V-20
12″ LACT12P-12V-20 LACT12-12V-20

For actuators with feedback, a built-in potentiometer is linked to the shaft position allowing for precise control of the actuator’s extension. Our line of Jrk G2 Motor Controllers with Feedback are a great solution for use with any of our linear actuators with feedback, and our most affordable option, the Jrk G2 21v3, is a great choice for use with our light-duty actuators specifically.

In separate but related news, we’ve also either created or updated Jrk settings files for all our linear actuators with feedback for use with our Jrk G2s:

These settings files can be opened in the Jrk configuration utility and then uploaded to your Jrk G2 motor controller. Please make sure to follow the detailed instructions on your actuator’s product page.

So what does one of these settings files do for you? The Jrks use a PID control loop to control the position of a motor based on feedback from that motor. PID stands for proportional, integral, and derivative, and for a control loop to work well, the PID coefficients must be tuned for the specific system they are being used in. The Jrk uses the coefficients for those terms along with the along with the difference between the motor’s actual position and its target position to calculate what the power to the motor should be. The details of this calculation are discussed in the Jrk’s user’s guide. Tuning the PID coefficients so your motor goes where you want it to can sometimes be difficult. The Jrk settings files provide a set of parameters that should work well for most uses of the linear actuators. Some systems might require more fine tuning, but even in those cases, the files should provide a good starting point.

I created these files by first starting with the default settings for the Jrk motor controller. I left the settings on the Motor, Errors, and Advanced tabs of the Jrk configuration utility on their defaults (with the exception of one of the files for the light-duty actuators having the motor direction reversed). On the input tab, I also left the input mode in Serial so you can control the linear actuator directly from the software. On the feedback tab, I set the feedback mode to analog voltage so the Jrk can read the potentiometer wiper of the linear actuator. To get the feedback values, I connected an actuator to the Jrk and ran the feedback setup wizard. (You might need to rerun this wizard for the specific actuator you have connected to your Jrk. The instructions on the actuators’ product pages go into more detail about this.)

Once all that was done, I configured the PID settings and worked out the PID coefficients by testing each type of actuator with the Jrks. We wanted to provide files that worked generally well across all the stroke length options for each type of actuator, so a lot of actuators were tested to come up with coefficients that worked well for all of them.

I set the proportional and derivative terms first, selecting terms that allowed the actuators to move at their highest speeds but not overshoot their target position. In general, you can get fairly good control over the actuator just using the proportional and derivative terms. In fact, if you are just testing your motor without a load, it might seem like you don’t need an integral term at all. However, there are situations where the control system can get stuck without moving all the way to its target. The controller will continue to apply power to get the actuator to the set position, but it won’t be enough to actually move the actuator. This can be fixed using the integral term of the PID loop. The error will add up over time and eventually get big enough to get things moving again. I was able to test this with the light-duty actuators using the setup below:

That’s one of our 20:1 light-duty actuators lifting 105 lbs (5 lbs less than its max dynamic load rating). Once I had a large enough load on the actuator, I could see that without an integral term set, the actuator would stall just short of its target position, continuing to apply power but not getting anywhere. Once the integral term was added, the Jrk was able to move it that last little bit to the target.

Unfortunately, I wasn’t able to perform the same test with our medium- and heavy-duty actuators; my makeshift testing rig couldn’t support a load high enough to produce the steady state error issue. However, I did add a little bit of an integral term to the files for those actuators anyway, making sure that doing so didn’t have an obvious negative effect on their performance.

If you want to learn some more about PID control, I found this video and its follow up from Brian Douglas’s channel on YouTube a helpful starting point.

One last note: the intro coupon for our Jrk G2 controllers still has some uses left. Add coupon code JRKG2INTRO to your cart and get up to three Jrk G2 motor controllers for 40% off!

# New product: high-density QTR reflectance sensor arrays

Posted by Jan on 31 July 2018
Tags: new products

I am excited to announce the first of a new line of reflectance sensor arrays that feature a high-density 4-mm pitch and dimmable IR emitter brightness control. In addition to versions with our familiar IR emitter/phototransistor pair modules without lenses, which we will keep calling “QTR,” we have versions with a higher-performance sensor with lenses on the IR emitter and phototransistor, which we are calling “QTRX.” These higher-performance sensors allow similar performance at a much lower IR LED current, which can really start adding up at higher channel counts. (High-brightness, “QTRXL” versions of these boards are coming soon, too.)

These new sensor arrays also feature LED brightness control that is independent of the supply voltage (which can be 2.9 V to 5.5 V) and separate controls for the odd-numbered LEDs and the even-numbered LEDs, which gives you extra options for detecting light reflected at various angles. As with our older QTR sensors, we are offering these in “A” versions with analog voltage outputs and “RC” versions that can be read with a digital I/O line on a microcontroller by first setting the line high and then releasing it and timing how long it takes for the voltage to get pulled to the logic low threshold:

This announcement therefore covers four total new products:

As with all our new products this year, we are offering a special introductory promotion, and this one is for half off up to three of each sensor type, limited to the first 100 customers using coupon code QTRHD07INTRO.

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