The LEDs are active-low (0) while the switches initial state is high (1). In other word, the PC software needs to give low (0) to on the LEDs and if a low (0) is read from the input pins, corresponding switch is pressed. I’m using the prototyping area provided beside the common 2510 connector on UC00A module . The completed circuit: Now lets continue with the coding. The PC software we need is one which can read the status of the DSR and CTS pins and light up LEDs for indication. “PinChanged” event is the solution for monitoring of the input pins continuously. It’s similar to microchip PIC’s interrupt-on-change feature.
Click here to download the full size of the above Circuit.
So whenever the state of those input pins change, it’ll runs the program under the handler function. After plugging in the UC00A with additional circuit, we can run the software and test it! You will notice that LED2 and LED3 blink for several times upon plugin. It’s because of the establishing of serial connection. This is how my GUI looks like after it’s connected to UC00A: COM22 shows the virtual COM port created by UC00A. Usually it’s the one with greatest number unless you have more than one UC00A connected to your PC at once. After selected the COM port, click on “Connect” will establish the serial communication between your PC and UC00A. The correct sequence would be when S1 (DSR) is pressed, LED2 (DTR) lights up, and when i press S2 (CTS), LED3 (RTS) lights up. After confirmed the functionality of the circuit and program, since we have two input, we can add the function to increase and decrease the system volume. So by pressing the switches, the volume of your system can be altered.
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: