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Tag Archive: Blynk
Day 14: Long-term temperature measurement
Behind today’s door is an NTC sensor (negative temperature coefficient thermistor). Its conductivity changes depending on the temperature. You’ll use the sensor today to undertake a long-term measurement of the temperature. As a small bonus, you can select a time…
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Day 13: Alarm system with push messages
Today’s project deals with a simple silent alarm system with password input for resetting the alarm. So that you get anything at all from the alarm, the board sends a push message to your smartphone. We’ll set the tilt sensor that’s…
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Day 12: Light monitor
Behind today’s door, you’ll find a phototransistor. This is a sensor with which the brightness can be measured. You’ll do that today, but in addition to simple measurement, the project also sounds an alarm as soon as limit values that…
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Day 11: Day- and nightlight
Behind today’s door is a 10-kohm resistor, but we don’t need it yet today. Instead, the set-up from yesterday’s test works today as well. In this project, you’ll build a day-night lamp that changes colours at specific times. Thus you…
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Day 10: Colour mixing
Behind today’s door is the reason for the many 1-kohm resistors. Namely, what you find there is a so-called RGB LED RGB stands for red-greenblue, since this LED is actually three LEDs that can be connected through a common cathode….
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Day 9: Brightness of the real LED
Behind today’s door is another 1-kohm resistor. But today you don’t have to change anything in the hardware layout from yesterday. Only a small detail changes on the interface. You don’t have to re-upload the programme because you’re simply manually…
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Day 8: Virtual LEDs
In the test for the sixth day, you saw how a push button on the hardware side can be mapped on a button in the app. However, another widget, namely the LED widget, is much simpler for this instance. In…
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Day 7: Analogue write
Behind today’s door is a potentiometer. You can use it to transfer analogue messages to the Blynk app. To do this, you need to build the circuit according to the picture. Things can get a bit tight when constructing with…
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Day 6: The hardware button
In yesterday’s test, you realised a simple control of an LED using the Blynk app. Today you’ll see that the control works in both directions. The push-button switch behind today’s door really comes in handy for this purpose. With it,…
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Day 5: Blynk
You already established a first connection from the board to the Internet yesterday. In the coming days, this connection should be used effectively. So we’re looking at the online platform Blynk, through which short commands, measurement data or messages can…
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