PWR-SWITCH is optically isolated EU style power load switch for up to 3500W, 230VAC/16A and can be driven with any microcontroller, Arduino, EPS32, or Linux computers directly with 3-24V

PWR-SWITCH hides the high voltage problems from the Arduino, ESP32, Raspberry Pi, Beaglebone, OLinuXino developers. It has 1500VAC optically isolation and can drive high voltage up to 230VAC / 16A loads safely.

To switch On or Off the loads from 3 to 24VDC can be used, so you can drive the loads with any microcontroller only 1mA is necessary to trigger the switch.

PWR-SWITCH is with EU stype plug and receptacle, so to use it in US or in UK you will need some of these:US to EU adapter, EU to US adapter or UK to EU adapter.

 PWR-SWITCH has CE-EMC and LVD certification.

Green LED show the switch status.

ESP32-DevKit-LiPo Open Source Hardware board GPIOs table and power consumption testings – in deep sleep the board uses only 65 uA

Our ESP32-DevKit-LiPo board is pin to pin compatible with Espressif ESP32-DevKit, but we add to it LiPo battery charger, so the board can operate from LiPo battery like BATTERY-LiPo1400mAh

High resolution of the above GPIO map is available here.

Having LiPo backup power supply allow WiFi/BLE connected handheld devices to be created with ESP32-DevKit-LiPo.

In our new Revision B of this board which is on prototype stage:

If PWR_SENS_E1 jumper is shorted your software can monitor if external power supply is attached or you work on battery.

If BAT_SEND_E1 jumper is shorted your software can read battery voltage.

When operating on battery low power is necessary, so we optimized the design of Revision. C to reduce power consumption as much as possible and here are the results:

ESP32-DevKit-LiPo powered by Li-Po battery (no LED)

• normal mode: 35mA +/-10%
• deep sleep mode: 0.065mA +/-10%

ESP32-DevKit-LiPo powered by 5V USB (LED up)

• normal mode: 35mA +/-10%
• deep sleep mode: 2mA +/-10%

 

If you need more memory and micro SD card for your Arduino project -OLIMEXINO-2560 is with 256K Flash and SD card on board

OLIMEXINO-2560 is Arduino Mega2560 like board which keeps ports conversion but adds UEXT connector to connect our wide range of modules and sensors, works on 5V and 3.3V, and has on board micro SD card for file storage and logging.

Power supply uses DCDC convertor with input range 6-15VDC when OLIMEXINO-2560 works on 5V and 5-15VDC when OLIMEXINO-2560 works on 3.3V.

Open Source Hardware ESP32-POE-ISO is now in stock and we are very proud with the result

We are very proud of our new ESP32-POE-ISO and delighted to announce it’s already in stock ready for order!

What we did with this improved version of the low cost ESP32-POE power over ethernet solution for IoT?

1. As many requested we add 3000VDC galvanic insulation. Now you can program / debug while connected to PoE switch or router;
2. Many asked for more GPIOs so we set SD-card in 1 bit mode and this way released 3 GPIO pins for other use;
3. We got hints that new Espressif SDK allow ultra deep sleep modes for ESP32 and we re-designed the power supply part that now the ESP32-POE-ISO has consumption down to 200 uA (130uA of which are taken from ESP32-WROOM-32D module). The rest board without the module consumes just 70uA;
4. As per your request now battery level has option to be monitored with the ESP32 ADC;
5. There is External power detection option, so your software will be aware when run sole on battery and when have plenty of power.
6. The Isolated DCDC we use is 2W and provides 400mA @5V, 100mA are reserved for the battery charge (available if no battery is connected) and 100mA are provided for ESP32, which leaves up to 200mA @5V for your additional circuit.

We love to listen to our customers and we did our the best to complete most of the requests we got with this new version.

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

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

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

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

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

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

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.

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.

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.