For our second build in the Make It Last Build Series, we`re constructing a robotic plant. This week, we`re going to put together the brains of the machine, which we will use in the coming weeks to bring our plant to life. This basic circuit will have support for one servo motor, an external crystal to keep accurate time, a capacitive touch inpu
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t, and plenty of I/O pins to drive LEDs, and read other sensors. This time around, we`ll be soldering it together to make a more permanent design, that will be perfect for placing in your plant pot. Just getting started We suggest you take a look at the announcement post for an introduction to the project and a parts list, then follow along with these instructions to build the brains for the robot plant. If you haven`t signed up for the newsletter, now is a good time to do so. Also, as a reminder, you don`t need to purchase any parts or build our project to be eligible for the contest in fact, the more creative you get, the better! So without further ado, lets get to the building! Note: We`re going to be soldering this project together on a perfboard. If you`ve never used them before, check out Collin`s Perfboard Prototyping video for a great introduction. If you`re still nervous, you can certainly just build your circuit on a solderless breadboard! The first step is to place our chip socket on the board. The sockets provides a way to connect our microcontroller without making it permanent, in case we need to swap it out for some reason. For our circuit, we`ll use the connection strip on the right (labeled X` on the Radio Shack board) for power, and the one on the left for ground. Connect wires from Pin 20 on the chip socket and Pin 2 on the programming header to the power strip. The ground connection is a bit trickier,...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
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