Some months ago I ordered a EM-406 GPS module from Sparkfun. I intended to explore geotagging and this module seemed to be a simple one to use : integrated antenna, SiRF III chipset (seems to be well know on forums) while not too expensive. You provide a 5V power source and it begins to output NMEA sentences on the TX output at 4800 bauds. When th
Click here to download the full size of the above Circuit.
e led stops blinking the module is fixed : enough satellites are tracked to computes its position as Lat/Long coordinates. One problem is that the serial level is not TTL : 2. 8V instead of 5V. Simply connecting the module TX to the level shifter RX-I is not enough. Another level adaptation is done with the following circuit I found after several days of Google fruitless searches : [Dead link]. The simplest way to test if you can correctly read NMEA sentences on your PC is to launch the Terminal configured with the following parameters : 4800 bauds, 1 stop-bit, no parity. To go further and actually see the content of the data sent by the GPS module, the SiRFDemo application is very helpful (
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: