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Leon Heller's user avatar
Leon Heller's user avatar
Leon Heller's user avatar
Leon Heller
  • Member for 14 years, 8 months
  • Last seen more than 1 year ago
79 votes
Accepted

What kind of components are black blobs on a PCB?

79 votes

Relay vs. Transistor?

76 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?

26 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?

20 votes
Accepted

What is the XMOS series?

19 votes
Accepted

Safety of making PCBs

19 votes

How do BJT transistors work in a saturated state?

18 votes
Accepted

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

18 votes
Accepted

How to design the capacitors used with Crystal Oscillators?

18 votes

What are the freeware SPICE simulators available?

18 votes

Audio AC coupling capacitors

17 votes

Best One-Off DIY PCB Creation Technique

17 votes
Accepted

Connect 230V AC 50Hz to oscilloscope

17 votes

Best PIC programmer?

17 votes
Accepted

Blind/buried vs. through hole vias?

16 votes
Accepted

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

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

High-voltage capacitor in a low-voltage system

16 votes
Accepted

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

15 votes

Why are there teardrops on PCB pads?

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