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Al Kepp
  • Member for 10 years, 5 months
  • Last seen more than a month ago
  • Vienna, Rakousko
65 votes
8 answers
18k views

Why are there so many relays used in a car, instead of transistors?

50 votes
4 answers
76k views

How to make traces on an universal PCB?

18 votes
5 answers
32k views

Is full wave rectifier better than half wave one?

11 votes
3 answers
16k views

Should I use slow fuse or fast fuse?

10 votes
2 answers
11k views

Serial capacitors in electronic ballast of a fluorescent lamp

8 votes
2 answers
6k views

Which type of 100nF capacitor is best for 78xx regulator output?

7 votes
5 answers
19k views

Why does a multimeter show VAC on VDC power supply output?

6 votes
1 answer
403 views

How to protect an electronic construction kit (a toy) from damages?

5 votes
1 answer
2k views

What is the capacity of capacitors in this power supply circuit?

5 votes
2 answers
648 views

BCR402R - what is the purpose of Rext in this LED driver?

4 votes
2 answers
10k views

Is this 7805-based design correct?

3 votes
1 answer
4k views

How can I determine the maximum possible current in a transformer?

3 votes
3 answers
315 views

Is telephone and LAN wiring symmetrical?

2 votes
2 answers
4k views

What is the purpose of a Zener diode added to the output of a SMPS?

2 votes
2 answers
6k views

A christmas light bulb question

2 votes
2 answers
246 views

Device is reset when switching power sources

1 vote
1 answer
3k views

Why a lower voltage is better for modern fast CPU and other similar chips?

0 votes
3 answers
285 views

Can I half the current rating when moving from 100-240V to just 230V?