TechTalks
@techtalks
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Joined: May 1, 2024
Last seen: Sep 23, 2025
Topics: 2 / Replies: 15
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Answer to: Why should unused inputs of logic gates not be left floating?

Unused inputs of logic gate ICs should never be left floating because they can cause unpredictable circuit behavior. In TTL logic, unconnected inputs ...

5 months ago
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Answer to: What's the best way to learn Arduino programming for beginners?

You're not alone—many people from non-CS backgrounds get into robotics and face this exact challenge. The good news is that learning programming for A...

6 months ago
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Answer to: Measuring a transformer with an oscilloscope

Measuring a transformer with an oscilloscope, especially in mains-powered circuits, requires caution to avoid damaging your equipment or risking perso...

6 months ago
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Answer to: BJT VS MOSFET- Current controlled vs Voltage controlled

MOSFETs are great for fast switching and are commonly used in inverter circuits, DC-DC converters, and motor drivers — up to a few hundred volts and m...

7 months ago
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Answer to: Can measuring current the wrong way damage my multimeter?

Yes, if you measure current like voltage (in parallel), you can short the circuit and blow the multimeter fuse, or worse, damage it.Also, if the probe...

8 months ago
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Answer to: How to interface a 16x2 LCD with Arduino without a potentiometer?

Yes, you can still control the contrast of a 16x2 LCD without a 10k potentiometer. There are two ways to do it. Use Fixed Resistors You can create ...

9 months ago
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Answer to: Why is impedance matching important in RF circuits?

Impedance matching in RF circuits prevents signal reflections, maximizes power transfer, and maintains efficiency. A mismatch causes standing waves, s...

10 months ago
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Answer to: ESP32 or STM32: Which is better for IoT?

Below is a table where I have mentioned all the major points between ESP32 and STM32. I hope this will help you to choose better.  Screenshot-1...

1 year ago
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Answer to: What is a Schmitt trigger, and how it works?

A Schmitt Trigger turns any noisy or irregular signal into a clean square wave by using two voltage thresholds: Rising Signal: When the input goes...

1 year ago
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Answer to: Good circuit simulation softwares- Any suggestions?

LTspice is a popular free tool, though its library of component models is somewhat limited (additional models can be added). For a more advanced and p...

1 year ago
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Answer to: What’s the difference between a Microprocessor and a Microcontroller?

A microprocessor serves as the "brain" of a computer, whereas a microcontroller is a complete computer system on a single chip. Microcontrollers are i...

1 year ago
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Answer to: Suggest some good Electronics books?

There are many books available in the market and online that are commonly recommended. Here are five of the most notable ones: Practical Electro...

1 year ago
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Answer to: Is It Safe to Control 15 LEDs Directly from Arduino Pins?

Hello Tristan, You see directly connecting 15 LEDs to Arduino pins can lead to overcurrent issues, potentially damaging the Arduino. This is because...

1 year ago
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Answer to: Why Does analogWrite Use a 0-255 Range for PWM?

Hello paul, In Arduino, the analogWrite function is used to generate a PWM signal on a specified pin. The value parameters ranging from (0-255) you ...

1 year ago
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