---
product_id: 316555261
title: "2pcs PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Develop Module"
price: "14949CFA"
currency: XOF
in_stock: true
url: https://www.desertcart.sn/products/316555261-2pcs-pcf8574-pcf8574t-io-expansion-board-i-o-expander-i2c
store_origin: SN
region: Senegal
---

# 2pcs PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Develop Module

**Price:** 14949CFA
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** 2pcs PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Develop Module
- **How much does it cost?** 14949CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/316555261-2pcs-pcf8574-pcf8574t-io-expansion-board-i-o-expander-i2c)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
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## Description

HiLetgo 2pcs PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Develop Module

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | HiLetgo |
| Part Number | 3-01-1150 |
| Item Weight | 0.634 ounces |
| Package Dimensions | 5.39 x 3.82 x 0.51 inches |
| Item model number | 3-01-1150 |
| Is Discontinued By Manufacturer | No |
| Size | Small |
| Color | Blue |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** HiLetgo
- **Model Name:** 3-01-1150
- **Connectivity Technology:** I2C
- **Operating System:** Linux
- **CPU Manufacturer:** Broadcom

## Images

![2pcs PCF8574 PCF8574T IO Expansion Board I/O Expander I2C Evaluation Develop Module - Image 1](https://m.media-amazon.com/images/I/6156N3iQNQL.jpg)

## Questions & Answers

**Q: Is there a wiring schematic for the pull-up resistors to trigger a relay from a esp8266. the pcf8574 wont put out voltage to trigger?**
A: What kind of relay? Need to know voltage and current for the relay coil. Best bet is to use an fet to drive the relay.  Still need to know your relay specs to answer completely.

**Q: Are these only digital I/O or also analog?**
A: These are discrete only, no analog. 
Best to use them as active = low. I follow them with a 74LVC14A when I need active = high.
Note the chips come in 2 address ranges. I have been receiving the low range with consistency.

**Q: Leds connected with vcc = 3.3v to board make them too dim. is this usual?**
A: There are a couple of reasons this could happen. The pins on the PCF8574 can only sink 25 mA of current and, if I'm reading the datasheet correctly, can source much less. So you'll want to put the LED from Vcc to the output pin (so that low = on) and use at least a couple hundred ohms of series resistance.

**Q: Where should the pullup resistor be placed to trigger a relay from an mcu?**
A: You can use any of the I/O pins of the Device. Do not exceed rated current!

## Frequently Bought Together

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-02-24*