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Gunther Schadow's user avatar
Gunther Schadow's user avatar
Gunther Schadow's user avatar
Gunther Schadow
  • Member for 4 years, 7 months
  • Last seen more than a week ago
15 votes
4 answers
5k views

Why in the world would the tab on a TO-220 package have a connection to anything (but GND, if applicable)?

7 votes
2 answers
5k views

How should I deal with KiCAD Electrical Rule Check warnings?

7 votes
4 answers
1k views

How to make a TTL low pulse of 100 ns to 1 μs with a simple RC on a 74LS04 inverter?

5 votes
1 answer
716 views

Buttons that do not bounce or scopes that pretend to be 100 MHz but actually aren't?

5 votes
8 answers
3k views

Crystal oscillator with inverter gate, crystal engraved with "1 MHz" outputs 1.68 MHz

3 votes
1 answer
766 views

How can a 74LS76 JK Flip Flop's outputs Q and Q-bar not be fully complementary?

3 votes
3 answers
841 views

Level transformation 0/+5 V TTL logic to +/-9V how to maximize gain and frequency range (DC to 4 MHz)

2 votes
1 answer
474 views

How do I use the Z-input on my oscilloscope (full range of contrast / brightness)?

2 votes
3 answers
838 views

Why does my crystal resonate at 4 times the specified frequency?

2 votes
2 answers
426 views

Can you get "raw" TFT display panels where you drive the gate and drain lines directly?

2 votes
2 answers
464 views

I need diodes to build a R-2R ladder DAC from original TTL chips (not Arduino) don't I?

2 votes
2 answers
473 views

Can Bruce Abbott's inverting TTL to +/- 12V level shifter be improved to better frequency response and better matched impedance?

2 votes
2 answers
1k views

What would be the simplest BJT based *linear* ramp generator?

2 votes
1 answer
2k views

LTspice simulation doesn't work, what am I doing wrong?

2 votes
3 answers
162 views

What can I do to get a stable bias on this current sink?

2 votes
1 answer
161 views

Does building my own LED screen work about as follows?

2 votes
2 answers
169 views

Connecting MCP2221 to a bidirectional shift register (e.g. 74LS198)

1 vote
2 answers
76 views

Why not always connect cells in series to increase voltage in solar component setups? [closed]

1 vote
3 answers
1k views

How do I build an RC-base negative edge detector, that makes a low pulse on a falling edge?

1 vote
2 answers
573 views

Wired AND, OR gates and compatibility with TTL/CMOS fan-out?

1 vote
3 answers
218 views

Is there a TTL or CMOS shift register chip which has an output pin telling you when it has shifted out all (8) bits?

1 vote
3 answers
514 views

Amplifier power problems, power supply limitations, or end stage base current draw

1 vote
2 answers
146 views

Any chance to build a dual 2-to-1 line selector/multiplexer from a single chip?

1 vote
2 answers
155 views

FETs or NPN transistors open at 0V at base in CircuitLab or is something wrong with my circuit?

1 vote
1 answer
117 views

I have a hardware-only Conway "Life Machine", is that interesting? [closed]

1 vote
0 answers
2k views

LTspice - how to simulate real TTL gates?

1 vote
2 answers
260 views

A sawtooth oscillator breaks down at higher frequencies

1 vote
1 answer
370 views

3-to-2 line encoder (or generally 2^(n-1)-to-n) -- not priority, but telling how many inputs are on?

1 vote
1 answer
360 views

How can I generate overflow condition from a 74'283 or 74'181 adder without an output pin of the carry-in of the MSB?

1 vote
0 answers
61 views

A bus routing puzzle, does it ring a bell?