12/2/2023 0 Comments Cd74hc4067 arduino* Quick Test with Arduino Uno & LED Bargraph Display * HP4067 (16-Channel Analog Multiplexer/Demultiplexer) Module Just to make it less cluttered, I used only 6 LEDs (out of 10) in the bargraph display with single 1K2 current limiter resistor (see the quick test video). The following code just lights up the LEDs, one after the other, with a small delay. There could be a lot of things that you can do with, however, this time I’m giving only a few ‘starter’ hints.įor the quick run experiment, apart from the HP4067 module, you’ll need an Arduino Uno and 16 LEDs (or an LED bargraph display like the one used by me). From what you’ve read, I understand that you have no problems playing your HP4067 module with Arduino. It’s in fact a pretty smart digitally-controllable SP16T bidirectional switch. The HP4067 module seems like a funny thing, that’s usual but never underestimate the power of the multiplexer chip resting at its core. Below is a quick reference table for those who doesn’t feel binary comfortable. For example, by writing 1001 to S3 S2 S1 S0, the C9 channel gets connected to the “SIG” pin. When you write a binary code to the switch pins (S0 – S3) the corresponding channel (C0 – C15) is selected. To recap, the “SIG” pin connects to any of the 16 available channels. To simplify things, bringing all 4 switch pins LOW (0) would switch the module to channel 0 (so SIG and C0 would be linked), bringing them all HIGH (1) would move it to 15 (so SIG and C15 would be linked). pulling it up to VCC will disable all channels, and pulling it down to GND will enable all channels. Also, there’s an enable (EN) input to enable/disable the channels i.e. The digital switch inputs (S0-S3) can be used in a binary style (0-15) to determine what channel (Co-C15) the “SIG” is connected to. The module actually works as a 16 to 1 switch. Nowadays you can buy cheap Chinese modules/ breakout boards based on HP4067, and it’s extremely easy to connect with your microcontroller. For this primer, I’m just going to utilize the quite popular 16-channel analog multiplexer/ demultiplexer HP4067 (CD74HC4067). In similar situations you can try an external analog/digital multiplexer/demultiplexer chip with your microcontroller as it can help you expand the I/O pins when you’re running out of pins! The HP4067 Analog Mux ModuleĪ multiplexer (mux), in principle, merely acts as a single-pole multi-through rotary switch that allows you to control the flow of one pin to many others usually in either direction. *This information is for general informational purposes only, we will not be liable for any loss or damage caused by the above information.Assume that you’re in the middle of a microcontroller-based project with a big array of sensors and transducers ready and waiting to get their I/O allocation by the microcontroller, and sadly you found yourself there’s not enough fill for the can. With a focus on sustainability and energy efficiency, TI is dedicated to making a positive impact on the world through its technology and products. TI is committed to innovation and customer satisfaction, and has a long history of delivering high-quality, reliable products to its customers. TI's product portfolio includes data converters, amplifiers and comparators, power management ICs, microcontrollers, sensors, and wireless connectivity solutions, among others. The company serves customers in a variety of industries, including automotive, communications, computing, industrial, and consumer electronics. TI is a global leader in the production of analog and digital signal processing (DSP) integrated circuits, as well as embedded processors and other microcontroller products. It was founded in 1930 and is headquartered in Dallas, Texas. Texas Instruments (TI) is a publicly traded company that designs and manufactures semiconductor and computer technology products. HIGH-SPEED CMOS LOGIC ANALOG MULTIPLEXER/DEMULTIPLEXERġ6-channel analog multiplexer/demultiplexer HIGH-SPEED CMOS LOGIC 16-CHANNEL ANALOG MULTIPLEXER and DEMULTIPLEXER High-Speed CMOS Logic 16-Channel Analog Multiplexer/Demultiplexer
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