This section covers Compact Flash, Flash-ATA and hard disks. For other media see DATA LOGGING TO RAM CARDS, page274, and DATA LOGGING TO FLASH AND RAM CHIPS, page279, With this module you can quickly build tailor-made data collection systems with removable memory that can be read by a personal computer. It is an ideal way to save time and money de
Click here to download the full size of the above Circuit.
signing custom loggers. The TDS2020F computer card carries a TDS2020CM2 PCMCIA piggyback adapter. Add removable Flash-ATA, Compact Flash, RAM or hard disk memory cards as appropriate to the application. The amount of data you can collect is limited only by card capacity. Data collected can be simply copied as a Windows file to your laptop or office hard disk (card drives for your personal computer are available, both internal and for connection to the parallel port). Alternatively recover data by connecting the module to a parallel printer, or send the information through a serial port, perhaps to a modem or over a telephone or radio link. See MODEMS, page313. Unlike PC solutions, the emphasis is on low power. The Flash or hard disk card is electrically disconnected most of the time. It is not even in standby: it consumes nothing. The software is written so that the storage card powers up as infrequently as possible. Between data readings the system itself may be put into standby so the Data Logger Module will consume less than 200 µA most of the time. A cache RAM on the TDS2020F ensures that the storage card does not have to power up very often. Eventually it will fill and in only 5 seconds a hard disk will spin-up, the computer will dump half a megabyte of data to disk, and the module will go back to standby. This short and infrequent operation takes a current of about 170mA at 12V for a hard disk but the long-term...
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: