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Build a Workbench / Table Saw Outfeed Table
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Simple GPS Logger
Sonos-like Wireless Multiroom Sound System
Large Silhouette Chandelier Decoration, the Grandelier
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First upgrade should be an angle grinder, you gonna save hours.. and days;)
Light-Up Disco Table
"The brightness is proportional to the on time" you said on step 5.Unfortunately, that's not true. For human eye, brightness is proportional to the log of intensity, e.g. "on" timeFull brightness is for 100% duty cycle, you will achieve:- half brightness with 35% duty cycle- quarter brightness with 15% duty cycleGoogle for "led duty cycle vs. brightness"
RetroPie Arcade Cabinet (Cocktail Style)
Segmented Log Lamp
Arduino Controlled CNC / 3D Printer Hybrid
100+ Arduino Projects
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Long range, 1.8km, Arduino to Arduino wireless communication with the HC-12.
Not sure I get your point. Do you mean it works with 5V, but not anymore when you power the transmitter with 9V?One important thing here is to make sure both power sources have the same (GND) reference, e.g. both grounds are connected.If they are not connected, both circuits are "floating", it means there is no reference for the DATA pin on the transmitterIn basic words, when there is a 0v/5v signal on arduino pin 12, it's 0v/5v relative to arduino ground. If arduino ground and transmitter ground are not connected, there is no way for the transmitter to guess the reference, hence to read the data coming from arduino.See second schematics bellow.
433 MHz Coil loaded antenna
Using 433MHz Remote Controlled Switches on Arduino
You shall use RadioHead, the library that supersedes & replaces the obsolete Virtual Wire.Same functionalities plus a lot more:- takes all the advantage of all available radio modules (not only ASK, incl. bi-directional transceivers as well, different coding/modulation...)- includes client-server, security....- able to work on TIMER2, if you need TIMER1 for something else... http://www.airspayce.com/mikem/arduino/RadioHead/classRH__ASK.html
Uber Home Automation w/ Arduino & Pi
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