Gravity: CH423 I2C 24 Digital IO Expansion Module

SKU: DFR0979 Brand: DFRobot

This CH423 IO expansion board extends 24 digital ports via I2C, including 8 GPIOs with interrupt functions and 16 GPOs...

$8.30 AUD, inc GST

$7.55 AUD, exc GST

Available with a lead time
Expect dispatch between Jan 06 and Jan 08

Quantity Discounts:

10-25 $7.32 (exc GST)
25+ $7.17 (exc GST)

This IO expansion board based on the CH423 chip extends 24 digital ports via I2C, including 8 GPIOs with interrupt functions and 16 GPOs.

CH423 has a built-in current drive circuit that offers a 15mA continuous drive current, which can statically drive 24 LED tubes or dynamically drive 128 LEDs. This CH423 I2C to GPIO IO expander is suitable for projects involving LED tubes, dot matrix screens, light cubes, etc.

Connection Diagram

Gravity: CH423 I2C 24 Digital IO Expansion Module

Features

8 general input/output pins
16 general output pins
Built-in driving circuit, up to 15mA continuous driving current

Applications

Driving LED lights
Driving Dot matrix screen
Driving Light Cubes

Specification

Power Supply: 3.3V~5V
Static Current: 1mA
IO Continuous Driving Current: 15mA
Communication: I2C
I2C Address: 0x20-0x3F(The module occupies I2C address of 0x20-0x3F and cannot work with I2C device in this address range.)
Operating Temperature Range: -20°C ~ 80°C
Size: 45 x 37mm (1.78 x 1.46”)

Documents

Parts List

Gravity: CH423 I2C 24 Digital IO Expansion Module x1
Gravity-4P I2C/UART Sensor cable x1

This product is listed in:

Breakouts & Modules>Expanders

Product Comments

Start the conversation

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

$3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
$7+ for Standard Post (typically 6+ business days, tracked)
$11+ for Express Post (typically 2+ business days, tracked)
Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.

International Orders - the following rates are for New Zealand and will vary for other countries:

$12+ for Pack and Track (3+ days, tracked)
$16+ for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

Have a product question? We're here to help!