Ever wondered how much current your USB devices use and how stabile is your USB voltage? Now you can measure!

USB-POWER

Some USB devices like 3G modems, WiFi etc in active mode draw lot of current and cause problems, to monitor the current consumption and how stabile is your USB voltage you can use this USB-POWER-METER.

The consumption is measured and displayed with 10mA accuracy. Voltage with 10mV accuracy.

OLIMEXINO-328 special version of Arduino made for low power battery applications

Screenshot from 2018-01-09 12-21-46

Our friends from IrDroid made evaluation of OLIMEXINO-328 board low power modes and blogged about it.

OLIMEXINO-328 is special version of Arduino made for Industrial applications – It can be powered from 9 to 30VDC. The board has build in LiPo charger and step up convertor so when external power is applied or connected to USB the LiPo battery is charged, if both External power and USB connection is missing the power supply is automatically back up by the LiPo battery and OLIMEXINO-328 keep running from battery.

All components of OLIMEXINO-328 work in temperature range -25+85C.

Low power voltage regulators are used to board can be bring down to few micro Ampers when not active.

New slim only 7 cm width Adjustable Power supply in stock

PWR

ATN-PS3005D adjustable power supply is one of our very popular sale items, whole class rooms in schools and universities here in Bulgaria were equipped with them, but they had one disadvantage – they were  huge and take lot of space on your desktop, so when we finish our stock we looked around for something similar 0-30V DC 5A regulated adjustable power supply but with smaller size, and we found this one above on the picture. With compact size of only 7 x 12 x 22 CM  this makes more room for other stuff on your desk! Smaller size means less transport cost also!

So now we retire ATN-PS3005D and replace it with PWR-PS3005!

A20-OLinuXino-LIME server with 320GB HDD works on LiPo battery over 6 hours

A20-OLinuXino-LIME-1

We have server rack with several x86 servers running Linux with our work file repositories, the ERP and etc.

They are quite power hungry as lot of HDDs are connected to them in RAID mirrors to prevent data loss.

We are located in industrial area and power supply glitches are not uncommon, specially during the winter.

To keep the servers alive during power downs, we had to buy expensive 2000 EUR UPS, which actually keep them no more than 20-30 minutes up when power is down, so basically just to allow you 10-15 minutes to finish your work and then to shut them down properly before the battery is drained.

This UPS has lead-acid batteries inside which has to be changed every 3 years and cost almost as much as the UPS itself.

Initially we kept our all Olinuxino Linux images on Gdrive, but there were few issues with this, the images grew to many Gigabytes, and Gdrive start to restrict the access to the files after some limits were reach, so we decided to host these images by us on torrent. We decided to make separate server for this due to security reasons, we just wanted to keep our local network private and to allow external access only to this isolated server which we access also from outside like other users.

To keep it as low power as possible we setup one A20-LIME + HDD320GB + 6600mAh LiPo battery. This configuration works well several years already.

Yesterday our power supply provider EVN warned us that they will change mains high voltage cables in our area and Olimex will have power supply cut from 9.00 to 15.00, so we had to take day off.

We came today and sure we found all x86 servers down, but to our surprise the LIME with the HDD was working fine all these 6 hours of power blackout and didn’t shut down!

We know that with 6600mAh battery the LIME will last at least 10 hours as it uses 1.5-2W, but the HDD is rated 5W (5V/1A), so we were expecting less time stand alone operation.

It was good surprise to see that actual consumption is less, maybe the HDD enters stand-by mode when not used?

New Products in stock: Open Source Hardware Breadboard DC-DC Power supply

BB-PWR-3608-1

We have three new boards designed with KiCAD:

BB-PWR-8009 is with input from 3 to 5.5V DC and convert it to 3.3V / 1.5A

BB-PWR-8113 is with input from 4.5 to 16V DC and convert it to 3.3V / 3A

BB-PWR-3608 is with input 5V and convert it to 12V or 24V /1A

All three boards have efficiency more than 90% and work from -40+85C, they snap to Breadboard power rails and are easy to integrate.

New Products in Stock: Regulated Power supplies

Image

ATN-PS3005D is regulated power supply with output voltage 0-30V and current 0-5A. The ripple noise is less 3mV. The power supply have over current, over voltage and thermal protections.

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ATN-PS3005S-3D is 3 channel power supply, first two channels are 0-30V and current 0-5A the 3rd channel is fixed to 5V / 3A.

The different channels can be connected in series or in parallel. The ripple noise is less 3mV. The power supply have over current, over voltage and thermal protections.

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ATN-TR6005-S is regulated power supply with output voltage 0-60V and current 0-5A. The ripple noise is less 3mV. The power supply have over current, over voltage and thermal protections.

FOSDEM-85 as thermometer with no external components

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Stefan Goetze submitted today cool project with FOSDEM-85 in our Project section.

https://www.olimex.com/Projects/

He is using the ATTiny85 internal chip sensor to measure the temperature, which he displays with LED blinks on Pinguino eyes. For this purpose he re-connected the Power LED to another port.

The document where he explains how he build it together with all source codes is here

Now FOSDEM-85 can be used as thermometer on your desk 🙂

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