The schematic for this tutorial can be seen drawn out below. It includes everything you`d need to wire up for the tutorial to work. PIC programming circuitry is not included in the schematic as I`m assuming either you`re programming the PIC out of circuit or can add the few elements into the circuit on your own for in-circuit programming. The 16x
Click here to download the full size of the above Circuit.
2 LCD interface has 8 data bits (DB0~DB7) and 3 control pins (RS, R/W*, E). The data bits are connected to the 8 pins of PORTD on the PIC. A special note to take is that the LCD data pins match the PIC pin-numbers. The control lines are connected to the lower 3 bits of PORTB on the PIC. As mentioned in the parts list, the 5k trimpot will control the contrast for the LCD. The schematic above shows you how the trimpot should be connected to the LCD, Power and Ground. After it is connected when you turn the trimpot dial characters on the screen will appear lighter and darker. Most 16x2 LCD`s have a backlight LED unless you opted to save a few bucks. There`s nothing special about these two pins (15 and 16). Slap a resistor infront of anode and connect the cathode to ground and immediately the backlight should turn on.
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: