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raddevus
  • Member for 8 years, 1 month
  • Last seen more than a week ago
43 votes
5 answers
171k views

How to connect multiple i2c-interface devices into a single pin A4 (SDA) and A5 (SCL) on Arduino?

  • 431
42 votes
8 answers
66k views

What is a pull up and pull down?

  • 8,358
31 votes
6 answers
261k views

Reducing voltage with resistors

31 votes
7 answers
8k views

Smart ways to detect a button (less power consuming)

  • 836
26 votes
6 answers
36k views

ATMega8: why do VCC and AVCC have to be connected?

  • 385
23 votes
5 answers
78k views

How do I know if which leg is the emitter or the collector? (Transistor)

  • 381
22 votes
10 answers
103k views

Is there a way to stop servos from "shaking"?

  • 3,411
18 votes
3 answers
19k views

Simple capacitor use for buffering a battery?

18 votes
4 answers
6k views

Why did my LED resistor burn while lighting four LEDs in series?

17 votes
3 answers
77k views

What is Full form of hFE of a digital multimeter?

14 votes
4 answers
49k views

How many volts can a 1 Watt 8 ohm speaker take?

  • 301
12 votes
2 answers
5k views

How many ground and power pins to have in a connector?

  • 446
12 votes
3 answers
15k views

How do I get +5v for loud noise, 0v for silence from Electret Microphone (or other components)?

  • 1,141
12 votes
2 answers
3k views

What's this driving circuit of LED?

  • 155
12 votes
5 answers
7k views

Accurately measuring temperature with Arduino

  • 123
11 votes
4 answers
14k views

555 timer: how to set values to take an hour

10 votes
2 answers
4k views

LED accent light that slowly dims when removed from power source

  • 225
9 votes
2 answers
28k views

Does the voltage on base limit the voltage on emitter?

9 votes
3 answers
12k views

Using NPN transistor as switch

4 votes
3 answers
6k views

Howto discharge a capacitor through an LED by removing the power

  • 733
3 votes
2 answers
11k views

What's a simpler way to switch between power sources?

  • 329
3 votes
3 answers
29k views

How to send string in serial communication in AVR-C

3 votes
6 answers
4k views

Control a lot of IR sensors with Arduino / Build a game board tile

  • 131
2 votes
1 answer
257 views

Using transistor as switch with low voltage

  • 605
2 votes
6 answers
38k views

How do I burn an ATmega328 chip via Arduino UNO as ISP?

2 votes
1 answer
13k views

Can I replace a non-polarized electrolytic capacitor with a ceramic disc capacitor? [closed]

2 votes
2 answers
4k views

High side switch and Low side switch

  • 3,838
1 vote
1 answer
2k views

Arduino nano, unexpected sound from buzzer when receive data from radio module HC-12

  • 121
1 vote
2 answers
2k views

Replacing push button by transistor in 555 circuit

  • 103
1 vote
1 answer
645 views

Replace Electret Microphone With Arduino Output

  • 59