Mar 28, 2025
ใ ERROR ERROR โข NO SIGNAL ใ ๐บ โ
portrait commission for @74hc595
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ใ ERROR ERROR โข NO SIGNAL ใ ๐บ โ
portrait commission for @74hc595
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74hc595
74hc595
Sometimes itโs fun to waste parts in the desire to learn how something works. I haven't ever connected more than one shift register together before. I went to my parts bins but was defeated to find I only had one shift register so, the bench testing fun will have to wait. Below is a simple circuit using two 555 timers as a clock and "data" input. In real life I was going to use one of my favorites the LM556 a dual 555 time on a single integrated circuit (IC). As for the shift register the IC of choice was the 74HC595.
Once built in the simulator I became inspired to try and out the LEDs in a fashion to use as one of those 3X3X3 LED matrixes. Make it like random-ish static cube, I'll have to play with the design a little more.
Integrated circuit #74HC595D #NXP #74HC08D #LM324DR3 #TI op amp #chip #electronic components #icgoodfind #IC #Electronics Skype: [email protected]
arduino word, 2 bytes, uint16_t, unsigned int, unsigned 16-bits integer or number 0-65535 data types 74HC595 shift register binary counter 16 leds visualization
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6-channel speaker selector
At the beginning of 2018, we developed the first version of the 6-channel speaker selector using PIC16F88 MCU and ULN2803 Darlington transistor array. In this new design, we redesign it with low-cost MCU and Darlington transistor arrays. This design also provides the same functionality as the 6-channel speaker selector switch we designed earlier.
This new speaker selector uses STC15W201 MCU. This MCU is a low-cost 8051 MCU designed by STC micro. At the time of this writing, the STC15W201 can obtain for less than US$ 0.8. To drive the seven segments and to control the relays, this design uses the popular 74HC595 8-bit shift register ICs.
To select each speaker channel, we use pair of 12V DPDT relays. These relays interface to 74HC595 through a ULN2001D 3-channel Darlington transistor array IC. This 3-channel Darlington driver IC is functionally equivalent to the famous 8-channel ULN2003 IC. This ULN2001D version is an 8-pin IC and is available in both DIP-8 and SOP-8 packages.ย
This new board is designed to work with a 12V DC power supply and in our prototype build, we use a 12V/5A SMPS unit to power the whole system.
To get the optimal results with this circuit, use an Omron G2R-2-12DC or an equivalent type of relay with a coil current lower than 100mA.ย
The firmware of the STC15W201S is developed using SDCC. To flash the MCU, we use stcgal. Thanks to the built-in bootloader, we can program this MCU using a generally available 5V USB to UART module/dongle.ย
The complete build process of the speaker selector is shown in the video below:
The functionality of the firmware is almost identical to the old PIC16F88 firmware. After powering up the system, the active speaker channel is displayed on the seven-segment display. To switch to a different speaker channel, press the button repeatedly with short intervals.ย
To mute or disconnect the current speaker channel, press and hold the same button for more than 3 seconds.ย
As described above, all functions of this circuit can be the control using a single push switch.
The PCBWay sponsored this project. PCBWay offers high-quality PCB manufacturing and assembling services. Also, they offer CNC and 3D printing services. The Speaker selector PCB is available to order from PCBWay. Check out the PCBWay website for its manufacturing capabilities and pricing.
This project is an open-source hardware project. All its design files, schematics, and firmware source codes are available at Github.com.ย
The PCB design, schematic, and other design files of this project are covered with a CERN-OHL-W 2.0 license. Firmware source code is released under the terms of the MIT license.
74HC595 VS 74LS595, 74HC595 VS 74HC164, 74HC595 vs MCP23017
A COMPREHENSIVE/DETAILED/COMPLETE INTRODUCTION to 74HC595 And its similar components.
Click to view: 74HC595 comparisons
Temperature output project using a python script which outputs the temperature to two til311 segment displays. The segment displays are located on a breadboard and the data is transferred via a shift register, the 74HC595. The shift register is controlled via gpio output pins from a raspberry pi 4. All the documentation can be found at https://sites.google.com/view/fxv300tech/raspberry-pi-4/projects/74hc595-shift-register-project/