Fast & Easy Fake-TV Light module built for under $5; with enhanced features. With the use of this device you can go for holidays or on vacation leaving your home with a lived in appearance and thus an added layer of security. “I’m up and I am a night owl … or perhaps asleep on the […]
Experimenting with an HF oscillator, I needed to control the varactor diode voltage in precise increments over a 2V-10V range. A buffered potentiometer was the obvious choice, and connecting two pots in series to give coarse/fine control (or using a multiturn pot) would offer improved control over the varactor voltage. However, this approach still didn’t
Control accurate incremental voltage steps with a rotary encoder Continue Reading
The device is designed for contactless measuring and monitoring temperature of objects. It is built on Melexis MLX90614 sensor and can measure temperatures in the range from -70°C to +380°C with 0.5°C accuracy and 0.01°C resolution. The period of measurements can be set in the menu from 1 sec to 1 min in 10 sec
Contactless Infrared Thermometer (Pyrometer) using MLX90614 and MSP430 Continue Reading
Have you ever wondered what’s inside your MacBook’s charger? There’s a lot more circuitry crammed into the compact power adapter than you’d expect, including a microprocessor. This charger teardown looks at the numerous components in the charger and explains how they work together to power your laptop. Most consumer electronics, from your cell phone to
Unhappy with a headlight modulator I purchased, I decided to make my own. Even though it would be a trivial programming project to use an Arduino Teensy or similar to do this, I decided to do it the “old fashioned” way, using a 555 timer. The 555 is a clever chip; not only will it
$120k Flooding-Mesh Protocol: the Duo can join as a node and also be a Wi-Fi gateway for the whole mesh network. Please check our Update #4 for more information and how to help us & our backers to reach the goal. $50K Python Support: we will add a Python interpreter $100K Dev Apps: for both
RedBear Duo: A small and powerful Wi-Fi + BLE IoT board Continue Reading
Although scientists are still working toward replacing lithium-ion (Li-ion) batteries with lithium-air (Li-air), or lithium-oxygen, batteries, researchers at the University of Cambridge have developed a lab-based demonstrator of such a battery. It is safe to say we still have another decade before we can begin to utilize such powerful batteries as scientists work to make
One year ago some personal problems forced us to interrupt our hobby work, but fortunately we are back and we found some time to develop new ideas, projects and writings. At this moment we are starting the first feasibily testing of an innovative 3D printing method that we’ve named Resin Deposition Modelling (RDM). Personally I
This project will help you create a temperature monitor using an ESP8266 SoC and a temperature sensor (DS18B20) with next capabilities: Measure Temperature Send an email if temperature goes under a threshold Monitor temperature and set threshold from a mobile App To complete this project you will have to create three things Hardware – Basically
Introducing the Mobilinkd Bluetooth APRS® TNC. With your radio, your Android phone and this TNC, you have everything you need to get started with APRS — all at a fraction of the cost of a dedicated APRS® radio, and with a better user interface than any APRS® HT on the market. Why a Mobilinkd TNC?
