FW: Pololu Memorial Day Sale going on now! 23% off all active Pololu-brand products

[glenn.f...@gmail.com]

Fyi good opportunity to stock up on Pololu step up/down regulators or other items from them…

 

• Glenn

 

 

From: Pololu Updates <in...@pololu.com>
Sent: Friday, May 26, 2023 6:14 PM
To: glenn.f...@gmail.com
Subject: Pololu Memorial Day Sale going on now! 23% off all active Pololu-brand products

 

including the new fully released 3pi+ 2040 robot family   Email not displaying correctly? View it in your browser     After several years of parts shortages, rationing, and associated price increases, we are finally getting net increases in parts on hand!  That has in turn allowed us to take hundreds of products off rationing over the past few months, and we are celebrating and highlighting them in our Memorial Day Sale by discounting all "active" status Pololu-brand products, which includes hundreds of items from robots to regulators to sensors, motors, wheels, and more. See the sale page for more details:   Take me to the sale...       We are also excited to announce the full release of the new edition to our line of 3pi+ robots: the 3pi+ 2040! This latest 3pi+ robot is a palm-sized, high-performance mobile platform based on the Raspberry Pi RP2040 MCU. Its many features include dual quadrature encoders for closed-loop speed or position control, line sensors, front bump sensors, a full IMU (3-axis accelerometer, magnetometer, and gyro), six RGB LEDs, and a graphical OLED display. The 3pi+ 2040 is included in our Memorial Day Sale, so you can grab it at a discount now:   3pi+ 2040   Pololu blog | Subscribe to our YouTube channel Follow us on Instagram | Follow us on Twitter | Like us on Facebook     Subscription information You were sent this email because you subscribed to our mailing list through our website. You can click here to change mailing list preferences for glenn.f...@gmail.com or reply to this email with an unsubscribe request.   You can also adjust your subscription preferences at any time on the Mailing list preferences section of your Pololu account page.     Pololu Corporation 920 Pilot Rd Las Vegas, NV 89119 702-262-6648

[smb...@gmail.com]

Yeah, I saw that and was going to stock up on regulators. You can never have too many of these, and it's good to grab a few of the larger current rating just in case.

Anything else worth getting in other peoples' experience? My purchase history includes the odd stepper motor driver, but that's about it.

Scott

[Douglas Miller]

They also sell SDCard modules, in case anyone is headed towards the new H8xSPI adapter.

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[Scott Baker]

Please post a part number of the SDCard module. That's not something I usually have on hand. Ought to be good to grab a couple!

Scott

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[Douglas Miller]

The two that I know of are:

https://www.pololu.com/product/2587

https://www.pololu.com/product/2597

The preferred one is probably #2587.

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[Steven Shumaker]

Several of the BOMs do not show Polulu units as acceptable subs for regulators.  Any reasons for not going with the Polulu units as subs for any of the LM78/79 stuff?

Steve

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[smb...@gmail.com]

The Pololu converters may have an inrush current rating lower than their full rating, and may shutdown if that's exceeded. This might require you to up the value of the converter (say, a 1.5A converter instead of a 1A converter). I believe Norberto generally designs his boards so that the Pololu converters will work, sometimes using multiple regulator footprints as necessary.

This inrush limit can actually be a feature. On one of my projects I observed the converter to be shutdown, thinking I had exceeded the inrush limit, hastily replaced it with a 7805, powered my board back up, and had a backwards-installed component emit the magic smoke. With a short, a 7805 will continue to deliver to its full capability until it hits thermal shutdown, whereas the Pololu converters will often harmlessly and immediately shut down.

Scott

[norberto.collado koyado.com]

I had same situation. That is why is important to have a Power LED on the new boards. If Power LED is “off” then we have a +5v short somewhere when powering the system on.

 

Norberto

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[Steven Shumaker]

Thanks!   I have this stack of boards and a cabinet that I'm finally about to start on - and I'm thinking I should standardize with Polulu across the set - especially with such a nice price.

Steve

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[smb...@gmail.com]

Note that there are a couple choices -- the S9V11 regulators and the S13 regulators. I've been perfectly happy with the S13 and they're a little cheaper than the S9V11. YMMV.

Scott

[Steven Shumaker]

Thanks!  Time to go shopping.

Steve

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