Questions tagged [74hc595]
Anything related to the 74HC595 integrated circuit. The 74HC595 is an 8 bit serial-input/parallel-output shift register with output latches and tri-state outputs.
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74HC595 Rows/Columns to drive LED matrix
Let's say we have one 74HC595 and we want to light 16 leds (common anode) connected as a 4x4 matrix exactly as in the following picture :
So, 4 first outputs to controls 4 rows.
The remaining 4 ...
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74HC595 - Initial output voltage
I've gone through the complete datasheet, searched SE and on google, but I cant seem to find this information:
Whats the output Voltage of QA..QH just after power-up when G (Output enable) is pulled ...
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Problem with 74hc595 voltage in Autodesk Circuits
I am very, very new to electronics, so please be patient with me, as I may say something silly. I also hope the question is not too wide, and would like to thank you in advance for spending your time ...
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74HC595 LED sign [closed]
I'm new to electronics so I'm sorry if this sounds stupid.
I recently created an LED sign consisting of 97 LED's on a piece of wood that all light up at the same time when I supply it with 3v. I have ...
user114118
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Relay Feedback Problem
I am a computer science student working on a project for my Diploma and I am building a DIY PDU,
I thought building something would be a lot funner then programming a website like 90% of the class
...
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For 12X8 LED array with any 1 LED glowing at a time, should we charlieplex or use 74HC595n?
Apologies in advance for probably missing a lot of things. I'm pretty new to electronics.
I'm building a 96(12X8) led (monochrome ultra bright, white) multiplexed array, driven by an Arduino nano. ...
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Why is the 74hc595 shift register causing a few pins to be lower voltage than others?
I've wired up two 74HC595s to a Photon from Particle. I followed this guide here for Arduino in how I wired it. The only place I deviated is to not put a capacitor on the latch pin.
It all appears to ...
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Why my solenoid valves open only if power is turned on at last?
I have a set of eight 48Vcc solenoid valves that I'm controlling using an Arduino. The open and close signals are sent using the Arduino's SPI lines, which are connected to a circuit composed by a ...
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Extending diode with a buzzer
Basic idea is to extend existing device with a buzzer: I want to make noise when one of the diodes lights up (DL12 on the attached picture). From the layout of the board I assume that U1 (M74HC595) is ...
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Shift Registers - How does one pronounce QH'
In the datasheet for the 74HC595 shift register, pin 9 is labeled "QH'" (not to be confused with pin 7, labeled "QH" without the "'"). I understand that this pin outputs the current contents of the ...
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Stepper Motor Controller With Arduino
I have seen many tutorial of Multiplexing 74HC595 with led's Is it possible to control Stepper motor with 74HC595 ? And Recently i have found a board SSC-32 which control 32 servos, so is it possible ...
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What is the difference between 74HC595N and 74HC595B1R shift registers?
They seem pretty the same, but B1R version is almost twice cheaper (at least in my country, and I don't know what are the manufacturers).
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Simplest way to produce a lagging pulse (latch trigger) after receiving another pulse (clock trigger)?
I am teaching myself how to use a 74HC595 shift register, and am fairly new to proper digital circuit design. I ran into a question. I am using a simple circuit involving a few LEDs, a switch for ...
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74HC595 + ULN2003A not driving stepper motor
Issue:
One of the stepper motors is not spinning.
Setup:
12V 10A power supply
arduino uno
28BYJ-48-5V stepper motor (27 ohm/winding)
74HC595
ULN2003A
The setup involves two stepper motor, as shown ...
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shift register RGB led brightness
I'm currently using 74HC595 shift register to light leds. Recently I decided to start using RGB leds instead of simple 1-color leds. Which means that I now have to ...
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How can I use a single 74595 to drive two different IC's?
I'm trying to build an audio circuit with as few parts as possible. Also, I really need to limit the number of pins used on my Arduino.
I didn't ask this in the Arduino site because I don't think ...
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Problem using Relays at 220V with 595
I'm having some complications when I'm trying to control 16 Relays using 2 595, these relays control loads connected to 5V, 12V and 220V. There are 8 loads at 220V using the 8 LSB from my SPI ...
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Building LED cube using 74HC595N
I'm working with 8x8x8 single color led cube.(8x8 anode cols and 8 cathode rows)
I've done soldering and I have lots of 74HC595N chips. Of course you know one chip can deal with 8 anode lead of LED. ...
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Current sourcing octal buffer/line-driver for 7+1 segment LED multiplexing?
I would like to multiplex 8, 7-segment LED displays with two, 8-bit shift-registers.
The required current for one segment is 20mA. I have no desire to overdrive the ...
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What is the input current of the 74HC595?
I need to calculate the power consumption of my circuit, but I can't find any information about the input current of the 74HC595.
I drive the 74HC595 with the atmega8 on 5v, but what is the input ...
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74HC595 Shift register - output pin polarity
Most shift register tutorials I've seen have the output pins connected to ground (for instance: http://www.arduino.cc/en/Tutorial/ShiftOut), however I've seen at least one circuit that connects them ...
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Looking for a way to output 100-144 Analog Channels from Arduino
I've been searching for days and found 2 ways that could work, but not sure about implementation:
Using shift registers like in: http://tronixstuff.com/2011/08/26/tutorial-maximising-your-arduinos-io-...
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Why does output voltage increase when pwm input frequency to output enable increase?
I'm trying to pulse-width modulate an output from a 74HC585 shift register.
To achieve this, I plugged a PWM output from a teensy 3.1 microcontroler into the output enable input of the 74HC595. The ...
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Extending DS2408 IOs with MAX7219 or 74HC595
I have an idea of building a model traffic lights node with Arduino. One node should serve the whole intersection with all the lights from all directions.
I want to use a 1-wire DS2408 to identify ...
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Shift Register Programming with 8 and 16 bit drivers
I built up a test circuit using 2 74hc595n shift registers to control a total of 16 leds with success. In the interest of saving space, I designed my circuit board to use one STP16CP05MTR shift ...
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74hc595n shift register error
I want to put in series 2 74hc595N . I made the schematic from here:
When I send a value the first register sends it also to the second one. I have same value on both. I change them (master/slave) ...
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Is it possible to drive a 4x4 RGB common-cathode LED matrix with a MAX7219?
The MAX7219 (datasheet) is a LED matrix driver that's designed to drive an 8X8 single-colour LED array.
tronixstuff has an intro on how to use it with an arduino that has some relevant diagrams.
I'm ...
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Help using less pins controlling 8ch relay
I know this has been answered somewhere but can't find the solution online.
I have an 8ch 5v->120VAC relay controlled by arduino and need help using less digital pins. All channels need to be ...
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74HC595 sharing SPI data line
I want to have my Arduino control several SPI slave devices, among them a 74HC595 shift register. I've having some trouble understanding how to properly handle communication - I get that the Slave ...
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MC74HC165N + Arduino, Dunno what's the issue
I connected the 74HC165 as per this schematic http://dlnmh9ip6v2uc.cloudfront.net/datasheets/BreakoutBoards/SN74HC165%20Shift-In%20Breakout-v11.pdf and then used this code http://playground.arduino.cc/...
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Arduino TLC5940 and 74HC595
I need to expand Arduino Uno output.
After some search I have identified 74HC595 to extend my Digital output and TLC5940 for analog output.
I'have also found how to connect them separately to Arduino ...
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are the m74hc595bl and 74hct93 interchangeable?
Im about to put an RGB fader circuit together and it requires the 74hct93. I have quite a few of the 74hc595's. I thought since they are close in name and both shift registers I would ask.
74hc595
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How much current can my 74HC595 handle on each output pin?
So, I've been checking out the datasheet and I've gotten pretty confused... At the top it claims that 6mA drive at 5V but farther down in the absolute maximum ratings it says that the outputs can be ...
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Why 74hc595 keep my light always on
I have a serial to parallel chip ( 74HC595-N ) which works well when I run the arduino script made for it. ( the current wiring work perfectly when I send data through the data pin )
But then I ...
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coding using Arduino, two 74HC595 and two RGB LED, problems with shifting out database
the whole point of this was to be able to send 8 bits of color code to 2 rgb leds through 2 74hc595 registers. if i can get the default color for each led to be sent out then the next part of code is ...
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Drive Fight on 7400 Series
I'm currently designing a 7400 series circuit to drive LEDs from a set of shift registers (74595). Each shift register's tri-state input is wired to the output of a 2:4 decoder (74139), and the ...
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74HC595 +TLC5940 multiplexing 128 leds -> not enough power
Apologies in advance for probably missing a lot of things. I'm pretty new to electronics.
I'm building a 128 led (monochrome) multiplexed array, driven by an Arduino. I'm using a 74HC595 as the ...
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How to shift out 16 bits fast on arduino board
I'm coding a system that need to shift out 16 bits fast from a uint16_t variable to two paired 74HC595 shift registers. I'm running the code on an Arduino (atmega328@16Mhz) and the shiftOut in the ...
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POV globe speed questions
I am planning on creating a RGB LED POV globe only physically larger then that one.
I am planning on using 64 RGB LEDs, requiring 3x pins per LED for a total of 192 outputs. Obviously I am going to ...
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What is needed to control 200 LED's from an Arduino
I am new to Arduino and want to use two 74HC595 shift registers to control 200 leds. What will I need to consider / get to make this possible?
These are your average starter LED's.
Thank you!
user2929
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Which SIPO chip is better, 74HC4094 or 74HC595 or something else?
I want to drive lots of LEDs in a spinning persistence-of-vision (POV) device.
I need one output pin per LED, because matrix techniques don't work right in spinning POV devices.
A serial-input, ...
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Multiple 74HC595 chained together won't light all LEDs
I'm new to Arduino - and electronics in general - and am having a frustrating problem with two serial-to-parallel 74HC595 chips trying to drive two 7-segment LED displays. The LEDs are both common ...
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How long between Arduino digital pin and IC?
My current project involves using 74HC595 shift registers to control an LED display, however the display could be up to 5 or so metres away from the Arduino board. The plan is to use some DB9/RS232 ...
user1307