This Lazy Old Geek is also an Arduino Geek. If you are an Arduino Geek, one of the common microcontrollers used by Arduinos is the Atmega328 chip. In order to use Arduino software, the Atmega must have bootloader software on it. I didn`t realize there was a difference. As far as I can tell, the Atmega328P-PU has lower power but it also has a diffe
Click here to download the full size of the above Circuit.
rent device signature which is important to Arduino users. As of November 2011, the Atmega328-PU is cheaper by about $1. Problem: So there are hundreds of articles on installing bootloader on the Atmega328. I built one using another Arduino to program the chip. I built one using the USB-BUB to program the chip. I built one using a parallel port to program the chip. Well, even after a week of troubleshooting and searching the Internet, none of them worked. So I gave up. I am usually a very persistent hacker but I`m getting old so I gave up. Well, this one looked a lot like most of the others I`d built. But it was from AdaFruit which has some of the best tutorials (accurate, complete, well documented) I`ve seen for the Arduino and it had different code. So I hacked up the hardware (See picture) using a RBBB Arduino and loaded the software. And guess what. It still didn`t work. Signature: So what is a signature Well, it turns out it is a specific code hard wired into the chip to identify it. Now all of the bootloader software seemed to be looking for 0x950F and not 9514 or 0G—9514. GeekSpeak: This is like ROM code that cannot be changed. By the way when you see programming code written starting with 0x` that means it is a hexadecimal number. I won`t go into details but hexadecimal numbers go from 0 to 15 instead of 0 to 10. Signature: So it turns out the bootloader software I`ve seen were based on the 0x950F signature which is...
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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