I’ve recently participated in a CTF (Capture The Flag) organized by HackTheBox and had a lot of fun solving the hardware and misc challenges. This is a quick write-up on my solutions.
This is the second part of a multiple part series about some hardware & software that I hacked together to monitor the AC current of our outdoor aircon unit. This part I’ll be discussing how I’ve established the hardware parts selection for this project, which are SCT013 Current Sensor, SAR ADC, thermistor, Gertduino, and Raspberry … Continue reading “Aircon Monitor Part 2 – The hardware – current sensor, ADC, thermistor & Arduino”
This is the first part of a multi-part series about some hardware & software that I hacked together to monitor the AC current of our outdoor inverter aircon unit, which is reporting an overcurrent error. Part 1 – The introduction – Why, what & how (you’re reading this) Part 2 – The hardware – current … Continue reading “Aircon Monitor – Part 1 – The introduction”
Today I needed to test a new PCB design for a load cell module. In order to evaluate the load response of the excitation circuit, I have to find a way to control the load current while observing the excitation voltage. The load curent needed is less than 20mA. A quick search online and I … Continue reading “Simple programmable load with gain”
I’ve been avoiding Samsung’s smartphone ever since my S3 (I9300), mainly because I felt cheated paying a premium for a cheap product. I believe most people would have heard of the famous crack screen on Note(s), crack frames and the eMMC hardware bug. I’m the victim of the latter 2 issues within 6 months of my purchase
While waiting for a proper Raspberry Pi case from element14 (formerly known as Farnell), I stumble across a site where the author designed a paper case for his Pi and kindly shared it to the world. I gave it a try today, and easily done it in less than 30 minutes. The design is well … Continue reading “DIY Case for Raspberry Pi”
I was in a discussion with Matthew Yun today, and just realized that the current rating system for product review or rating contains so much noise that the 5 stars system is simply ambiguous to help consumer to decide a product. We were specifically taking about Google Play, but it applies generally to most review … Continue reading “The flaws of current stars rating system”
Lately transmission on my RT-N16 has been acting a little too unreliable. Since I have 2 spare Raspberry Pi sitting in my drawer, I’ve decided to start utilizing them as my Bit Torrent client. At the same time, I’ve had plan to turn the Pi into a baby monitor. Great!!! Since the router is not … Continue reading “Migrating transmission-daemon from RT-N16 to Raspberry Pi + Baby Monitor”
Hi, welcome to geekoder.com. I’m Mohd Lee, nickname faulty or faultylee. This is my personal blog where I share my hobby, things I’m working on, ideas, travel and so on. Feel free to look around, bookmark if you find anything interesting and please do comment on anything if you like to. This blog is the restart of the first … Continue reading “Pilot – About geekoder.com”
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