The Tech Blog

Smallest Certified Bluetooth Module(EYSHSNZWZ)

Posted under Educational, Product Reviews, Technology on September 19th, 2020 by Amaldev

This right here is the world’s smallest certified Bluetooth module(EYSHSNZWZ) from Taiyo Yuden. With a size of 3.25mm x 8.55mm x 0.85mm, it’s really tiny. The pic below shows it next to a Basmati rice grain. Its Bluetooth 5 compatible, Nordic nRF52832(WLCSP package) chip with ARM Cortex M4F(512KB Flash/64KB RAM). Its entirely certified for FCC, Japan, China and EU usage for wireless plug-and-play. Reduces the headache of certification and antenna performance. One of the best choices out for tiny wearable modules. Scared to use this on a project. Hopefully won’t misplace this one. 😀
PS: Have also added an internet mandatory image next to a banana for scale.

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Planned Product Obsolescence of a Water Purifier

Posted under DIY, Educational, Hacks on August 22nd, 2020 by Amaldev

People who use Aquaguard or any water purifier in their homes find the common issue of a stable green indicator light(or whatever colour according to your model) which is a so-called LED to tell you to change your filter cartridge. In most of these models please understand that this light has nothing to do with a measured quality/life of a filter. It’s just an electronic timer which counts the time and turns on this light. Please don’t get fooled by this.

The way to reset this is, to open the back panel of your filter and find a small reset switch. Keep it pressed on while the power is on for around 30secs or so to reset the light. Then it will be back to normal. This is just kept there to get you to buy new filters from the company. The famous “Recurring Revenue model”.

To calculate the time to change your filter, just measure your daily water consumption from the purifier and calculate the number of days it will run for. A good cartridge is slated for at least 6000L of water purification(It would be mentioned on the cartridge). Please make informed decisions on facts and don’t get fooled by the planned obsolescence tactics by companies.

Jago Grahak Jago!

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