Digital Design

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Digital circuit and logic questions (ie. Logic, Gates, I2C, USB, 555 Timer, etc.)
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bushrat
What is the difference between CD4020 and CD4040?
Last message by
AnalogKid
13
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7K
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W
Help with an SPI Master circuit
Last message by
nsaspook
5
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1K
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R
Read Byte Array of I2C module using I2C to USB converter
Last message by
Raymond Genovese
1
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1K
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E
Leds for multiple chip select active low pin state indicator
Last message by
dendad
3
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1K
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H
MK105 change frequency
Last message by
atferrari
2 3
58
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4K
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F
Build a circuit to read a one-wire signal
Last message by
dendad
6
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2K
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K
OR gate output not HIGH despite one input at 1V
Last message by
khojka
3
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974
Views
P
Logic-Level MOSFET (5v Gate); drive from 3.3v MC with level shifter? BJT? separate driver chip.
Last message by
ScottWang
8
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7K
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F
soldering usb cable directly onto usb port
Last message by
Alec_t
3
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6K
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EmaCO2
HELP! Step-up switching regulator, 3,3v input to 50v output, low current
Last message by
jayanthd
7
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2K
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T
I need assistance with bulbs and resistors..
Last message by
Norfindel
13
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2K
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Koen Verrijt
Which interface to use - USB, GPIB, or RS232 while both supplying and reading a DC Voltage?
Last message by
Reloadron
1
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2K
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A
Momentary pulse for constant voltage change
Last message by
asprinwizard
2 3
46
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7K
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T
Water tank automatic refilling
Last message by
jayanthd
2
27
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4K
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A
555 as inrush limitter for Motor [SOLVED]
Last message by
anishkgt
2 3
45
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4K
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D
Worth Using Alternative to 555 for Astable Clock
Last message by
djsfantasi
6
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3K
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Slaven Smiljanic
CMOS astable multivibrator duty cycle
Last message by
jpanhalt
2
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1K
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A
Where to find this USB 3.0 type A male connector from USB flash drive?
Last message by
Ambrosios
0
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737
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fouad belkhadem
need help routing pcb
Last message by
fouad belkhadem
6
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1K
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A
0-100% duty cycle with 555
Last message by
Bordodynov
18
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11K
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