Tag Archives: hardware

Using the ESP32 ESP32S Universal Purple Expansion Board module compatible with 38 pins ESP32 development board

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Based on the previous post https://chow.karmeng.my/2025/03/28/programming-esp32-wrover-with-dht22-am2302-humidity-and-temperature-sensor/ , the breadboard that I had purchased has very unreliable connectivity. Resulting in signals from sensor not able to reach the ESP32 microcontroller board.

Upon hours of browsing, discovered expansion board module that is compatible with ESP32 and based on the price it does not break my pocket.

Gotten this cheap from an ecommerce site available in Malaysia

At the time of this post the price point offered is very affordable. I had order 2 pieces of the hardware.

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How to upgrade an old laptop that is lagging

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First assuming that compatible hardware is available, get compatible SODIMM RAM. and identify type of hard disk your laptop can use.

General idea, check the laptop user manual to identify what are the maximum RAM that are supported total, what are the maximum RAM supported in a slot. And importantly does the motherboard chipset of your laptop supports SODIMM that are different capacity. Clock speed as long as its higher than the laptop spec, the motherboard chipset will automatically tune the RAM Clock speed to match the maximum speed supported by the motherboard.

For context, the old laptop for upgrade is an Acer Aspire E5-475 which comes with 4GB RAM, 1TB HDD that has an Intel i5-7200U CPU at 2.5GHz.

Generally, a laptop should be serviceable, however by opening the service area, it will void the laptop warranty, ACER Aspire E5-475
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