Questions tagged [analog]

Electronic devices with a continuously variable signal. The term "analogue" describes the proportional relationship between a signal and a voltage or current that represents the signal.

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how to offload precise ADC oversampling with RISC-V GD32VF103CBT6 Development Board [closed]

I'm hoping to work up a very basic audio effects device using a RISC-V GD32VF103CBT6 Development Board. I have managed to do some hardware-interrupt-based sampling with another MCU, but I'm a bit ...
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69 views

Continuous voltage on IO Pins while 5V is not Connected?

i have a small project where i just sucessfully destroyed my frist of 5 Digisparks (Attiny85). In the Picture you see the Cirucit. I have 2 Liion cells connected in series to get high enough voltage ...
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55 views

Convert 1-5V to 4-20mA using Arduino

I am trying to convert 1-5V to 0-20mA which is then used to drive VFD. Actually, I want 1-5V Variable output from Arduino. I am using PWM but its output 0V or 5V depending upon the duty cycle. Is ...
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67 views

Boost an audio signal for analog read - Envelope Detector

I'm working on my first Arduino project and I have a sensitivity issue. I'm building a module to listen to an audio signal and to start the power source of my speaker with a relay. Everything seems ...
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20 views

Connecting two sensors to one analog pin

I am completely new to programming with Arduino so please bear with me if this seems stupid. I am using an Arduino Uno R3. I have two sensors, a Soil Moisture sensor and an LDR Light Sensor. Both ...
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195 views

DHT11 analog or digital?

I saw some projects with DHT11, some connect it with analog pin, others connect with digital pin. Is there any difference / advantage connecting to the analog?
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1answer
48 views

How to find the peak value of analog signal?

I have a question .. Please help me I don't know how Arduino can read the peak value of the sensor signal. The value I want is in the ADC value .. What I want is ... for 5 seconds there will be 1 ...
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78 views

Can't figure out source of interference reading 10k POTs with 74HC4051

I realize this gets asked a lot, but I feel like I've applied the most common fixes without success. I have 10 10k potentiometers plugged in to an arduino via a custom shield. 2 are wired directly to ...
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101 views

ADC register always returning high

Regardless of whatever voltage at A0, the software is always returning high (1023) volatile unsigned char* ADmux = (unsigned char*) 0x7C; volatile unsigned char* ADCSRa = (unsigned char*) 0x7A; ...
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72 views

How to Measure many voltages (Uno) - Analog extenders a good option?

I am trying to make a battery capacity tester (3.7v li-ion 18650 battery) using arduino uno. If possible i'd like to test 20 or more batteries at the same time. I need to measure the voltage of each ...
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169 views

Is AREF a stable output Ref voltage with analogReference(INTERNAL)

I'm using an analog input on a NANO board to measure the midpoint between two photo resistive (Cadmium) cells, with the two outside ends tied to GND and a source voltage. Basically a simple voltage ...