For the first version of my Open Source Framework for USB Generic HID devices based on the PIC18F and Windows I made a quick example of how to use the library using a USB interface for an LCD. Now that I`ve completed the second version of the library I thought it would be fun to enhance the LCD project into a completely self-contained LCD module w
Click here to download the full size of the above Circuit.
hich would fit in a 5. 25 inch drive-bay of a PC case. This project explains how the LCD module can be built along with PIC firmware and Windows host software written around the C# USB Generic HID library. For the example host code the CPU and memory utilisation is displayed on the LCD along with the current time. The hardware is the same size as the LCD itself and can be mounted directly behind the ATM1602B 2*16 LCD module to provide a compact host-powered LCD for many applications. The hardware design is extremely simple and can be built using the supplied PCB artwork or on a stripboard/breadboard. The circuit consists of a PIC18F2550 with a 20 Mhz resonator and the required components for the LCD screen and the USB. The circuit board uses mainly SMD devices (although you could fit through-hole devices in the same space it saves a lot of time drilling holes). Also the USB connection is provided via a SMD mini-USB connector which keeps the whole module very thin and space-efficient. Only the top copper layer is used (and there are no jump wires required) so this can be easily made with a single sided PCB. Here is a picture of the completed board: As you can see in the picture, the display is connected to the controller board using single strand wire. You simply solder the wire to the controller board then mount the LCD on top using some screws (and I used some M6 bolts to act as spacers) and then solder the wires to the...
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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