On this project we will control anAVR microcontroller (MCU) via Visual Basic 6. The applications of this circuit is countless. You can make, anything you want, that needs control from a Personal Computer (PC)or from anycircuit collects data from sensors. Finally, itsends these data to Visual Basic based software by using the RS232 port. You have to know, this project
Click here to download the full size of the above Circuit.
is in generic form, to give you the idea of controlling aMCU through a serial port. You can modify the source codes to make yourown circuit but onlyfor personal use. Any commercial use of this project is not allowed. You can use for your experiments, anAVR development unit such asMCU100, STK200, STK500 or an AVRdevelopment boardthat contains 8 LEDs, 5 switches or more and some RS232 chip like MAX232, MAX202 etc. The software is named "AVR RS232 interface" and it`s writtenin Visual Basic 6. It`s constituted by the main windowand "about" window. On the generic mask you can choose the COMport you have connected the AVR board ( For development boards I mean the spareRS232 connector, not the connector that you programming the MCUs ). On the "Switches on interface" window, are5 green cycles. If you press any of these 5 switches on the AVR board, this cycle will be in red color. The value of the receivedcharacter canbe viewed in binary format, onthe below text box. On the "LEDs on interface" window, you will see 8 buttons with green color. When you press abutton you will see that the current led on AVR board will be turned-off. If you press it again, the LED will be turned-on. The value of the sentcharacter can be viewed in Decimal and ASCII format in two below text boxes.
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.....
characters left: