Usage of Schmitt trigger NAND Gates
I have a question about your “Long Duration Timer” circuit, del20017 found here ..Long Duration Timer Clock. You have labeled U1 as a 4093. A 4093 is a NAND with schmitt trigger inputs, yet...
Category: Digital-Circuits
RS Latch Erroneously setting by Itself
I am having trouble preventing my rs latch from erroneously setting. The circuit is a voltage threshold detection circuit with a nand gate whose output is tied to a SR latch. I have capacitors...
Microcontroller Interfacing
None of this is specific to a particular microcontroller or family of microcontrollers; it applies equally well to PICs or AVRs or 8051s or any other processor. Check the datasheet of your part to...
Dynamic Digital Tutors
Date: Wed, 30 May 2007 17:00:46 -0400 – Subject: 555 simulator Hello, I just found and had a chance to play with the 555 simulator over the internet. As I do a lot of...
Timer and Counter Modules
U1 CD4541 is a Timer with Long Duration Ability. This timer is started by a low pulse from earlier circuit, when the temperature goes above setpoint, a low state is at U2A inputs, this...
Frequency Divider 74HCT4040
U1 7555 is a CMOS version of 555. The 555 here is in Astable Oscillator mode, C1 and C4 are decoupling capacitors 0.1uF value, ceramic disc. Mixed and Interface Circuits The output is around...
Digital Counter – 4029 and 4511
I just about the circuit you made. what kind of IC is 4029N & 4511N? Is it a diver/decoder? I tried to research on the datasheet but it cannot give exact specification…
Running Lights with CD4017
The 555 Astable generates a clock for this circuit, an oscillator giving a square wave output at pin 3 which is counted by 4017 to give a running lights effect. Digital Timers Counters and...
OR gate with two 555
This shows how to OR gate two 555, when one 555 cycles at a low frequency a valve turns on an off, the second 555 stretches the ON duration of the pulse with a...
Printer Port 256 Relays 16K Dot Matrix
Using this circuit on Printer Port, one could drive 256 Relays or 16K LEDs as Dot Matrix display. It can be used to drive a Large size multiplexed LED dot matrix display or Latched...
Seven Segment LED display
how is the circuit for driving a seven segment led mail from EA A 7 segment LED display is used to display a number 0-9 using 7 LEDs, The circuit you design must have...
Sample and Hold with Standby CD4053
A, B, and C are the Digital Control for x, y and z input and output pairs.The voltage at Vinx is stored in C1 when A goes high, when A is low the voltage...
