some projetcts to show which are on the slab for testing.
I'll put documentations up to the wiki as soon as I have some spare time.... may take a while
First a project that might look a bit needless: A 4ch-relay.
I know there is the Sonoff 4ch - I couldn't use it. I wanted to put it behind some LED panels at the ceiling
but it is just too big, it does not fit between ceiling and panel.
So I designed a somewhat smaller one that fits the AK-N-42 case from AliExpres (100x80x30 mm).
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- 4ch-Relay.jpg (70.84 KiB) Viewed 18455 times
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Outdoor Sensor
A new outdoor sensor was designed and two prototypes are running already here on north and south side.
It's equipped with a SHT1x humidity and temperature sensor, a BMP180 pressure sensor and two luminosity
sensors, the BH1750 and the TLS2561. The sensors are pluggable so it can be equipped by your choice.
It's kept small enough to fit into a 83x58x33 mm IP65 box availlable from AliExpress.
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- Outdoor_Sensor.jpg (83.07 KiB) Viewed 18455 times
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Remote Control.
As my old remotes were a bit outdated and not flexible I've created a new one residing in a AK-N-42 box.
It is based on a MCP23017 so 16 IO's are availlable. To keep it as flexible as possible and to get the
buttons near the front a second PCB is used as a "piggyback", keeping buttons, LEDs and even some
WS2812B Neopixel LEDs. If another configuration of buttons or LEDs is needed just the piggyback PCB
has to be redesigned. Nearly every combination is possible, limited only by number of tasks (12 atm).
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- Remote_Complete.jpg (79.51 KiB) Viewed 18455 times
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New room sensors.
As my roomsensor design shown in the wiki is pretty outdated i wanted to create a new one.
At last it showed that two designs were needed. Both can be equipped with a environmental
sensor as BMP180, BME280 or such and a luminosity sensor, a small OLED display on top if wanted.
A buzzer can be placed on the PCB so you may use the sensor for alarming purposes or just as
an alarm clock.
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- Roomsensors.jpg (61.84 KiB) Viewed 18455 times
Left is the standard design. Sensors and display are plugable so choose what you want or replace it later.
The bigger sensor on the right contains a Figaro CO sensor as the ususal MQ-senors showed to be completely
unreliable. Additional sensors and the display can be placed on a piggyback PCB.
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Thundermon - a Thunderstorm monitor
Beware - this is a pure proof of concept build at this time. The final design will be completely different
due to some things that are not to my likings. I'll separate the lighning antenna from the main PCB so it
can be separated as it must be placed outside. I don't like some details with the circuit at this time.
It uses the electromagnetic fields of lightnings - do you remeber old AM radios? A thunderstorm gives
noises in those old radios. A little and cheap receiver chip detects these pulses. I tried to use the
ESP itself for evaluating these pulses but it has shown that this does not work well. So I used a
very small AVR CPU (ATTiny13) for evaluationg and the ESP does the rest.
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- Thundermon-Front.jpg (66.52 KiB) Viewed 18455 times
The black coil on the left is the receiver antenna.
A big disatvantage of this prototype: Most likely it can't be built with usual tools you have at home.
It has a density of SMD parts that needs hot air soldering and a lot of experience.
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- Thundermon-Back.jpg (63.14 KiB) Viewed 18455 times
The final version will have more features: Single LEDs per funcion, atm some LED outputs are used
for more then one signal making the connection to the ESP quite complex. On top an automatic
gain recalibration at least once per day will be implemented, an analog field strength value too.
This will need an AVR CPU with some more IO-pins, the ATTiny2313A.
And now I'm waiting for some real thunderstorms....
We want you to get time to spend on documentation ASAP 
