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RC Signal Monitor Using Bargraph & RC Switch using Relay

The versatile Bar-Graph SMD components based R/C monitor & R/C switch is a great tool for R/C hobbyist R/C modeller and DIY robotics. Tiny Bar-Graph displays provide a Red color bright, easy to read display of Radio Control (R/C) signal from 1mS to 2mS. The Barograph RC Signal reader is based on PIC16F886 microcontroller. This high performance measurement device, provides unique capabilities and can be ...

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ESP8266 16MB Flash Handling

In recent weeks a number of ESP8266 devices have become available offering more than the previous defacto maximum of 4MB of flash memory. Wemos’s D1 mini pro offers 16MB of flash, and the ESP-100 claims to offer 8MB. To put this in context, the original ESP8266 modules (such as the ESP-01) offered 512KB of flash, with the more recent ones (ESP-07) 1MB and then 4MB. The maximum addressable flash memory of th ...

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MPPT solar charger

In a previous post I have presented a design for an MPPT Solar Charger. In the mean time I have built a prototype and also wrote some software for it. So today I’ll go through my findings of what works well and what needs to be improved. And yes, there are some flaws in the design… The software is far from final but with the notable exception of USB all the basic functionality has been implemented. Power Su ...

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C.H.I.P Pro The New GR8-Based Module

NextThing Co., is a hardware company that has the goal to create things that would inspire creativity, and help people chase their own ideas of what needed to exist.  After producing their world’s first $9 computer C.H.I.P, they are ready now to launch a new product!C.H.I.P Pro,  the newest addition to the Next Thing Co. family, is powered by GR8, a system-in-package (SiP) that was designed by Next Thing Co ...

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DIY portable spectrometer

Spectral signature is a characteristic property of a material that represent how the matter interacts with an electromagnetic radiation at different wavelengths. By looking at the reflectance spectra of a material, scientists can not only retrieve vital information like the chemical composition and crystal structure of the material, but also the presence of any impurities or third element within it. The ins ...

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Traffic status on a wall clock

Use of traffic navigation apps to minimize the wait time on road is very common for drivers these days. Google navigation gathers data from the drivers who are navigating via Google Maps and shows the traffic flow on smartphones in real time. While this is a great feature to have in smartphone, it would be nice to have access to the same information in a much simpler way without the need to open the app. Th ...

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64×16 MQTT LED Matrix Display

MQTT LED Matrix Display 7 Replies My MQTT network at home moves up and down a lot of messages: sensor values, triggers, notifications, device statuses,… I use Node-RED to forward the important ones to PushOver and some others to a Blynk application. But I also happen to have an LED display at home and that means FUN. LED displays are cool. Your team’s score, your number in the IRS queue, the estimated arriv ...

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