What did you build today (Pictures) ?

[Nca78]

@alowhum said in What did you build today (Pictures) ?:

• I usually go for the BEM280 instead of the BMP085 and DHT22. It's so cheap now.

Unfortunately most of the cheap breakout boards found on AliExpress use clones with much worse specs than the original version

In fact, I always make all my sensors with the Nano Wireless Expansion Board, which is about $2. You can simply plug in the NRF24 into it.
https://www.aliexpress.com/item/Free-shipping-Nano-328P-IO-wireless-sensor-expansion-board-for-XBEE-and-NRF24L01-Socket-for-arduino/32264665470.html

But you can't really make battery-powered sensors with those ? The regulators are AMS1117 with 5mA typical quiescent current.

[monte]

@nca78 said in What did you build today (Pictures) ?:

Unfortunately most of the cheap breakout boards found on AliExpress use clones with much worse specs than the original version

Could you be more specific? How exactly worth specs does they have. Was going to buy a bunch of them. Maybe there is some comparison or tests?

[alowhum]

@sundberg84 yes, sorry about that, I realised too late that it's an expansion board.

@Nca78 Thanks! That 5ma leak current was exactly the kind of info I needed about the board. I was wondering it if could be useful for battery powered things. None of my sensors are. Well, one - I used the BBC Micro:bit as a battery powered motion sensor.

I guess not having a regulator on board is what makes the Arduino Pro Micro so good at being battery powered.

Out of curiosity: if I attached the board to a Usb powerbank (say 10.000 Mah) to operate as an electricity led pulse sensor.. what would be an estimate for how long it would run?

[mfalkvidd]

@alowhum rough calculation: 10,000/5 = 2,000h = 83 days. Lower if other componens also consume power.

[mfalkvidd]

@monte clones use different components, so it depends on which clone.

[gohan]

@alowhum said in What did you build today (Pictures) ?:

I guess not having a regulator on board is what makes the Arduino Pro Micro so good at being battery powered.

actually the better solution is the pro mini at 3.3v with regulator and led removed, and you can use an LDO regulator to power it with a LiPo cell or no regulator at all if you use a LiFePO4 battery. Using the arduino at 3.3v allows you to use all radio modules and all the low power sensors.

[alexsh1]

This is my new PSU - 3D printed enclosure and a few components
It is very precise.

[Yveaux]

@alexsh1 nice! Why do you have 4 banana sockets and what's the color coding?

[bjacobse]

@alexsh1 Looks awesome

[NeverDie]

Something nice about those power supplies is that for very little extra money (maybe $1-3 extra) you can buy versions with UART and/or even bluetooth data output that you can send to a logger. I'd have to check, but it might even be controllable that way also.

[gohan]

Yes, in fact I bought the DPS5015 with its metal box and BT/USB interface and I can control it from the computer. Data logging of course is limited to the values on the screen

[alexsh1]

@yveaux This is simple. The Aliexpress seller sent me these instead of black and red ones. So I have been creative - black and blue is negative and yellow and green is positive. Did not bothered waiting for a few weeks for replacement.

[alexsh1]

@neverdie It is purely for logging and control. I did not require either so did not order it. If you add all extras, it does become considerably more expensive.

[sundberg84]

@alexsh1 very nice! Is the 3d-drawing online to be downloaded? I think I want one as well.

[dakipro]

Saw that all other kids cool kids have one, so I installed one kitchen-pc as well.
It is Flytech K757 15'' POS terminal, windows 10 pro, touch screen, 300gb (soon to be ssd) 8gb ram dual core 2,2ghz. Purchased from local "ebay" for around 140 eur.

Now I can make that awesome dinner, once in a full moon, without having to carry and unlock my phone all the time...

[axillent]

esp8266 based thermostat for heating system

[axillent]

bridge from single wire (my w3p manchester based) to UART. will be used to bridge single wire network with Ethernet throuth ESP8266 or STM32 + Wiznet

second photo - development stand with w3p bus

[alexsh1]

@sundberg84

Yes, you can downloads STLs from here: https://www.thingiverse.com/thing:2250644
There another one https://www.thingiverse.com/thing:1816188

[monte]

Build myself a simple temperature sensor with a clock. No RTC, just pulling time from controller and updating every 10 minutes to avoid drift. Also requesting outdoor temperature from controller. Build from what was lying around - DHT22, pro mini clone, nokia screen. I can share the code if someone needs it :)

[gohan]

@monte if you can share, pls do so :)