The PCA9685 is a quite practical IC. It is connected to the microcontroller (for example ESP8266) via I2C and can then control up to 16 individual PWM channels. So you can [...]
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Category: Evening project(<2h)
The evening projects category contains all projects from Nerdiy.de that require a maximum of two hours to implement.
HowTo: Node Red – Control Spotify from NodeRed
What I really like about Spotify is that it's very networkable. You can play or control music or podcast on another device with just a few clicks. Thanks to the free possibility [...]
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HowTo: Node Red – Show gas station prices in the area on the dashboard
With NodeRed or the appropriate nodes, you can very easily retrieve data from the Internet and display it in a processed form. A practical use case for this is, for example, the retrieval of gas station prices [...]
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HowTo: Arduino - Build timer "time_timy" for visualization of time durations
The 3D printed case of the "pxlDigits" was not intended to be "only" a 7-segment display with WLAN. Originally I made a kind of timer out of a two-digit 7-segment display for [...].
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HowTo: ESPEasy – Connect and read LDR to Wemos D1 Mini
There are some situations in which the connection of an LDR to an ESP makes sense. This is because it is relatively easy and for little money to adjust the brightness in a room [...].
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HowTo: pxlBlck - Display relative values as BarGraph
I started with the documentation of the pxlBlcks in November 2020 after Hackaday.com announced the "GoodBye 2020"-Challenge. (More info here: https://hackaday.io/contest/175608-goodbye-2020/details) I had used [...]
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HowTo: 3D printing - Build a foot tambourine yourself
Actually not one of the typical posts for Nerdiy.de, but recently I was looking for a tambourine that I can operate myself while playing guitar. Long speech, [...]
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HowTo: 3D printing - Build a foot rattle yourself
Looking for a foot rattle to accompany the guitar playing I had the similar problem as with the foot tambourine. Therefore again: Do it yourself. 🙂 A tutorial to make your own foot rattle [...]
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HowTo: pxlBlck - Building the pxlBlck_RingClock
The pxlBlck_RingClock is very similar to the pxlBlck_SlotClock. It is also built with the help of a 1×60 LED matrix and can display the time according to the same scheme as the pxlBlck_SlotClock. However, the [...]
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HowTo: pxlBlck - build pxlBlck_8x8
The pxlBlck_8x8 was one of the first members of the pxlBlck family. Thanks to the few parts and the prefabricated WS2812 8×8 LED matrix it is quite fast to build and thanks to the adapter board it offers [...]
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HowTo: pxlBlck – design icons, transfer them to the pxlBlck and display them
I started developing the pxlBlcks because I was looking for a way to stay informed about events in the SmartHome. In the meantime there are two in [...]
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HowTo: pxlBlck – Configure and display animations
With the help of pxlBlck you can be informed about events in different ways. One of these ways is to display previously set icons. Unfortunately this possibility [...]
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HowTo: pxlBlck – configure clock faces and screen savers
The adjustable dials differ from the type of LED matrix used. Unfortunately, this is because different matrix sizes allow or do not allow different displays. Nevertheless, to give you a small overview [...]
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HowTo: pxlBlck – Automatic adjustment of the display brightness via LDR
If you not only want to stay informed about events with your pxlBlck and also use it to display the current time, then you may have already noticed that a fixed [...]
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HowTo: ESPEasy – Activate NTP time retrieval from the Internet
Thanks to WiFi and thus (often) also Internet connection, an ESP8266 or ESP32 programmed with ESPEasy also has the possibility to display the time. For this to work, the call [...]
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HowTo: Electronics – Build your own waterproof 12V chain of lights
For a camping trip I was looking for a cheap and bright light chain. This should be waterproof and bright enough to be able to properly illuminate the tent. Perfect would be [...]
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HowTo: Electronics – encapsulate electronics waterproof with epoxy
During the construction of a light chain I was faced with the problem of how I could get this light chain waterproof. Finally, I have the electronic components, which must not be exposed to moisture in [...]
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HowTo: Node Red - Fridge Door Monitoring Using Energy Consumption
In recent weeks, I have often had the problem that my freezer door did not close properly. This resulted in at least one night when the refrigerator door did not close for almost seven hours [...]
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HowTo: ESPEasy - Using a PCA9685 to control servos
The PCA9685 is a PWM port expander. With this it is possible to connect up to 16 LEDs, servos or other components to your ESP8266 and supply them with a PWM signal. Thanks to [...]
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HowTo: Raspberry Pi – Configure default speakers
The RaspberryPi can be equipped with a speaker in different ways. The easiest way is the connection via the 3.5mm jack plug. There is also the option of connecting the sound via the [...]
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HowTo: Raspberry Pi – Use Raspberry Pi with “Raspotify” as a Spotify speaker
In the article RaspberryPi - "Shairport" Install Airplay on the RaspberryPi I described how you can extend your RaspberryPi relatively easily with the function of an AirPlay speaker. Thanks to a [...]
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HowTo: Raspberry Pi – Install "Shairport" Airplay on the Raspberry Pi
Everyone who uses one (or more) Apple devices surely knows the AirPlay function. Thanks to this, media of all kinds can be streamed to other devices in the network. This way, you can share photos on a [...]
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HowTo: Tasmota – Flash Sonoff iFan03 with Tasmota firmware
There are some practical modules in the Sonoff range. Among them is the "Sonoff iFan03". This is actually intended to control ceiling fans and a connected lamp via remote control and WLAN [...].
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HowTo: Node Red – Pushbullet notification for SSH login
From the FritzBox I am used to being notified as soon as someone logs on to my FritzBox. I think this is a great security feature. At some point I thought that it [...]
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HowTo: Tasmota – Flash firmware with TuyaConvert
Flashing devices with the ESP8266 is already described in the article ESP8266 - flashing .bin files under Windows with the "Esptool". Many ready SmartHome devices such as various sockets [...]
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HowTo: Tasmota – Set off-delayed after-running of a relay
The overrun of a relay is actually a quite often used function. Unfortunately, this is (at least until today) not so easy to realize with the Tasmota relays. A practical use case [...]
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HowTo: Node Red – Control the FritzBox radiator thermostat from Node Red
I recently ordered one of the DECT radiator thermostats for the FritzBox out of curiosity. As usual with the Fritz products, installation and commissioning was super easy. For attachment and setup [...]
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HowTo: Node Red - Restarting the FritzBox from the dashboard
It doesn't happen often, but sometimes a reboot of the FritzBox helps to fix problems in the network or with the internet connection. To restart the FritzBox there are [...]
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HowTo: Electronics - nanoPxl V1.1 SMD components soldering
Currently I am working on the first preparations of a somewhat larger project. For this I need LEDs which shine a little brighter. At the same time I did not want to give up the comfort of the known [...]
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HowTo: Node Red – Automatically save the Node Red journal after starting Node Red (for debugging purposes)
Recently I had a problem with NodeRed that causes the NodeRed process to crash sometimes. This is not a big deal since it restarts automatically. On the [...]
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