Testing charge-pump ICs

Sometimes we need a negative voltage rail. There are several ways to obtain that but most likely the easiest is to use a charge-pump IC with only two capacitors. Because the datasheet doesn’t always paint a clear picture I decided to order a few and do my own testing for the things I care about (current, ripple, switching frequency).

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Author's profile picture Bogdan Rădulescu on DIY

IoT Fuzzy Clock

Let’s see how to make a very precise clock that will be read with a large margin of error. It should be easy for the technically inclined and it can also be fun.

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Author's profile picture Bogdan Rădulescu on DIY

Hacking Radio Remotes

Cheap wireless remotes are everywhere and the purpose of this article is to learn how most of them work, how secure they are and how to create your own in order to clone or extend an existing remote.

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Author's profile picture Bogdan Rădulescu on electronics

MicroSD card quick test

MicroSD cards are everywhere these days but since these days it’s possible to film in UHD or in high speed with action cameras and phones it’s actually very important how quick these cards are at writing this data.

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Author's profile picture Bogdan Rădulescu on gadgets

PHP on Google App Engine

You can host your PHP apps on the Google infrastructure and only pay according to how popular your app is. Let’s see how it actually works.

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Author's profile picture Bogdan Rădulescu on Cloud