PimV
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ESP8266 ASCII to HEX convertion and checking
3 votes

A little explanation about HEX and ASCII: About HEX Raw computer data consists of zeros and ones. For humans it is difficult to read a (long) row of zeros and ones. You can represent such a row (of a ...

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Does the Arduino pro-micro 3.3v use an 8MHz crystal or a 16MHz crystal with a clock divisor of 2?
Accepted answer
2 votes

On the schematic of the Sparkfun Pro Micro 3.3V/8 Mhz (here) a resonator of 16 MHz is drawn. But also is stated there: "Board is marked with combination of resonator frequency and regulator voltage". ...

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Power on reset with arduino uno can never happen. Can this be fixed?
2 votes

See 'DTR-reset' circuit of Arduino Uno below. After powering-on, when DTR is set low (because a sketch is coming in) the falling edge causes a negative pulse on the 328P's external reset pin of ca. 3 ...

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Trouble understanding connection diagram
2 votes

Normally you would connect the ground (0V) side of resistor R2 to the ground of the Arduino and the other side of R2 (which is also connected to the emitter of Q1) to an input pin of the Arduino. When ...

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Getting individual outputs from 4 load cells
2 votes

For this purpose there are 'simple' interface boards like the HX711 (google on HX711). A guy named Bogde has written an Arduino library to manage this board which you can find on GitHub (https://...

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Look for Master and Slave code with error for a Arduino Mege
2 votes

I am not sure that I understand what you are planning to build. From the Internet I see that a "10c Sim" is a flight simulation program. Therefore I assume you plan to build some hardware, like flight ...

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Turn on Indicator LED if Moisture Sensor Value >= MaxDryness for longer than 20 min
2 votes

Following is an example how it could be coded. Remember that the soil is dry by setting DrySoil = true. Register the time at which a dry period starts in DrySoilBegin. Check at each 'dry' reading ...

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Arduino UNO socket
2 votes

The Arduino Uno has no on-board battery. The dc barrel jack is provided to give you more options to power the Uno, which is handy for stand-alone applications (without USB-connection to a computer) ...

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Controlling output frequency of 3 Phase SPWM Inverter
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1 votes

In this sketch the PWM values, matching a sampled sine curve, are stored in integer array sinPWM[]. The values from sinPWM (1 - 255) are used unmodified (via intermediate variables x, y and z) to set ...

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Why does Arduino Tone example with 8 ohm speaker make USB port fail?
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1 votes

As already mentioned in your question, in the Arduino tutorial "Melody" under "Hardware Required" is stated "piezo buzzer or a speaker" and in the comment that heads the sketch is stated: "8 ohm ...

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Confusion between switch and if?
1 votes

If you want to use a dedicated push button for every led, then it is not handy to use a switch .. case statement. This is because first you have to construct the switch-variable based on the readings ...

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How to read the raw data from GY-85 module?
1 votes

One of the places where the datasheets for the sensors of the GY-85 module can be found is here: https://www.hotmcu.com/gy85-9dof-imu-sensor-module-p-298.html The following information comes from ...

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HG-C 1100 measurement sensor
0 votes

The HG-C1100 has a resolution of 70 μm (= 0.07 mm) over a measuring range of 70 mm. You quote errors of 0.28 and 0.38 mm, which is worse than can be expected (±0,07 mm). The resolution is 1‰ of the ...

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LB1847 stepper controller :how to connect to grbl atmega based board with step ,direction,enable , limit?
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0 votes

It seems that most people use an Arduino CNC Shield to connect their Arduino Uno (running GRBL software) to the drivers of the stepper-motors. Via Google you find plenty of them, for example: here and ...

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Measure movement distance - not sure what sensor?
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0 votes

The sensor to use is an accelerometer. The principle is easy: measure the acceleration, perform a double integration and you have the distance (after the first integration you have the velocity). The ...

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