Leon Heller's user avatar
Leon Heller's user avatar
Leon Heller's user avatar
Leon Heller
  • Member for 13 years, 6 months
  • Last seen more than a month ago
78 votes

Relay vs. Transistor?

77 votes
Accepted

What kind of components are black blobs on a PCB?

74 votes
Accepted

Are solder fumes bad for me?

49 votes

Why are there 3 pins on some batteries?

35 votes

What are good microcontrollers available today?

34 votes

What measures should I take to protect the USB ports of my PC during development of a USB device?

30 votes
Accepted

What is this squiggly trace for?

24 votes
Accepted

What's the difference between a potentiometer and a rheostat?

23 votes
Accepted

How to carry high current on PCB

20 votes
Accepted

Why does LTSpice say that my "Matrix is singular" for this ideal-transformer circuit?

20 votes

What happens when an embedded program finishes?

20 votes

How do you attack a new board?

19 votes
Accepted

What is the XMOS series?

18 votes

Audio AC coupling capacitors

18 votes

What are the freeware SPICE simulators available?

18 votes
Accepted

How to design the capacitors used with Crystal Oscillators?

18 votes

How do BJT transistors work in a saturated state?

17 votes

Best PIC programmer?

17 votes
Accepted

Safety of making PCBs

17 votes

Best One-Off DIY PCB Creation Technique

17 votes
Accepted

Connect 230V AC 50Hz to oscilloscope

16 votes

Why is there such a strong preference for 45 degree angles in PCB routing?

16 votes
Accepted

What causes turning ON a single output pin on Microchip PIC16F690 to spontaneously turn OFF another pin on the same port?

16 votes
Accepted

Using oblong / rounded surface mounted pads for chip resistors, capacitors and inductors

16 votes
Accepted

Is it safe to drive a MOSFET from an output pin of a microcontroller?

16 votes
Accepted

what size of copper wire can act as a 150A fuse?

16 votes

High-voltage capacitor in a low-voltage system

16 votes
Accepted

Blind/buried vs. through hole vias?

15 votes
Accepted

If a PIC MCU provides multiple Vdd/Vss should you provide power to them all?

15 votes

Why are there teardrops on PCB pads?

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