What is this dark copper-less PCB feature?
88483
Silk-screened 'buttons' on a touch-tone phone?
55130
Why are things like RESET/MCLR active low on most ICs?
74418
What is the difference in this specific breadboard wiring?
149460
'bridges' on a PCB copper layer
93892
Why does a neon lamp indicator on a power strip switch flicker in the dark?
114434
Can someone identify a resistor with only markings on it see TP?
79639
multi-layer board copper pour
26193
Help digesting schematic layout
113985
Why is the first band on a resistor never black?
70973
How to make traces on an universal PCB?
64128
Name of component on output side cable of a DC power adapter?
97132
Why does the LM1117 data sheet specifically specify tantalum capacitors?
37859
Help understanding this schematic : Why is the diode there (AT89C2051 Programmer)?
3639
Why are vias placed this way on a PCB?
136823
How to choose trace width for very high current PCB?
16242
How do two-leaded color changing LEDs work?
132473
Identifying a resistor with a weird band combination