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U2
74hc595 7 segment display
dedomraz123

dedomraz123

@copilot 74hc595 7 segment display
2y

copilot

Your project is using an SN74HC595N (designator U1) which is an 8-bit shift register, and a HDSP-5503 (designator U2), a 7-segment LED display, in your Flux project. It seems you want to connect the 74HC595 to the display and use it to control the display.
The SN74HC595N has 8 output pins (Q0 to Q7) and these can be used to drive the segments of your display. From your project, it seems you have already connected the 74HC595 outputs to the HDSP-5503 as follows:
  • Q0 to ANODE_A (Segment A)
  • Q1 to ANODE_B (Segment B)
  • Q2 to ANODE_C (Segment C)
  • Q3 to ANODE_D (Segment D)
  • Q4 to ANODE_E (Segment E)
  • Q5 to ANODE_F (Segment F)
  • Q6 to ANODE_G (Segment G)
This connection allows you to control each individual segment of the display directly from the shift register.
It's important to ensure proper current limiting to each segment to prevent damaging the device. This could be done at the output of each pin of the 74HC595 using a current limiting resistor. However, I see no resistors mentioned in your current schematic- you may need to add them.
One thing to note: your schematic doesn't seem to control the decimal point as one of the output (Q7) from the 74HC595 seems to be unconnected. If you want to have control over the decimal point (ANODE_DP) of your display, you should connect it to the remaining output pin of the shift register.
Make sure to connect VCC and GND of both U1 and U2 to respective power and ground rails.
Also, ensure the other pins on the SN74HC595N are appropriately configured:
  • The shift register clock pin (SH_CP) and the storage register clock pin (ST_CP) require a clock signal to shift and latch data.
  • The data pin (DS) is the data input for your register.
  • The master reset pin (~MR) should be held high (connected to VCC) during normal operation. If you momentarily pull it low, it clears all the outputs to low.
  • The output enable pin (~OE) if your 74HC595 has one, is active low - meaning when it's low, the outputs are enabled. To ensure the outputs are always enabled, you can connect ~OE directly to GND.
These considerations should assist you in connecting a 74HC595 to a 7-segment display in a Flux project.
Please remember to confirm the correctness of my assumptions about your control and connectivities before proceeding. I am basing my advice on your provided project information.
2y
3
make a pcb for 7 segment display connected to 74hc595
dedomraz123

dedomraz123

@copilot make a pcb for 7 segment display connected to 74hc595
2y

copilot

Given the text description of your project, it appears that you already have the necessary schematic in place for a 7-segment display (HDSP-5503) connected to a 74HC595 shift register (SN74HC595N). The next step will be to arrange and connect these components in a suitable PCB layout.
Follow these broad steps in the Flux PCB layout editor:
Step 1: Placement Place your components on the board in an appropriate and compact configuration. You'll want to place the 7-segment display (U2) in a location where it can be easily seen, and other components like the SN74HC595N shift register (U1) and the capacitor (C2) nearby.
Step 2: Ground Plane Establish a ground plane on both the top and bottom layers of the board, connecting it to all GND pins.
Step 3: Connections Start creating traces between your components according to your schematic:
  • Connect all eight output pins Q0–Q7 from the shift register (U1) to the corresponding anodes A-G and DP of the 7-segment display.
  • Connect the voltage output pin (VO) of the voltage regulator (U3) to the power pin (VCC) of your shift register (U1) and also to one terminal (P1) of the capacitor (C2).
  • The other terminal (P2) of the capacitor (C2) should be connected to ground.
  • The common cathode pins (COMMON_CATHODE_1 and COMMON_CATHODE_2) of the 7-segment display (U2) should connect to ground.
Step 4: Clearance & Checks Ensure that there's sufficient clearance between all components to abide by DRC rules.
Also, do a connectivity check to verify that all connections have been made as per the schematic and there are no unconnected pins left.
Remember these are high-level guidelines. The actual positioning and routing could vary based on the size and shape of the PCB you are designing.
Please note that all designators are derived from the provided project description. They might vary if the actual schematic designators have been modified.
If you're unclear about any part of this process or need further assistance on a specific step, don't hesitate to ask!
2y
1
C2
Capacitance
Capacitance
C1
Capacitance
Capacitance
U1
U3
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Oral Crimson Universal Remote

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