You might have seen on the TV documentaries before, where there’s a device that specially designed to measure the torque in an automobile drive shaft. Do you have any interest to build up this marvelous Horsepower monitor? If you want, then please read on this article…

This Horsepower monitor can provide an output to a vehicle data recording system or a portable computer via an RS-232 interface. Beside that, all of the received data can be combined with RPM measurements from the data recording system for calculating the horsepower!

For your information, this horsepower monitor consist the following components:

A sensor unit (It attaches to the driveshaft)

This sensor unit is a fully powered by battery and it can be used to communicate with the receiver via a 433 Mhz RF data link.

A receiver unit (It provides the serial output signal)

The receiver unit is powered by the vehicle electrical system!

The whole circuitry is operated from two lithium batteries that being mounted in the lower housing half, where it is to maintain assembly balance. In order to conserve power, a centrifugal switch switches on these batteries, only when the shaft is rotates.

You’re thinking of getting a new and more powerful flash card audio player and you have no idea when to find it, then this article is going to shed some light on you.

This flash card audio player is a little bit special than the other, as it used the LPC2138 microcontroller-based as the main heart. Talking about LPC2138, it is a 16/32 bit ARM7TDMI-S microcontroller with real-time emulation and embedded trace support, together with 64/512 kilobytes of embedded high speed flash memory. This means, a 128-bit wide internal memory interface and a unique accelerator will allow 31-bit code execution at maximum clock rate.

The LPC2138 are being widely used due to their tiny size and low power consumption. Thus, it is ideal for application where miniaturization is the main key, such as access control and point-of-sale. Furthermore, with a wide range of serial communication interfaces and on-chip SRAM option of 16/32 kilobytes, they’re suitable for communication gateways, protocol converters, voice recognition and so on.

Technically, with this flash card audio player, it enables the device playing music files that being stored on a removable flash memory card. Hence, you don’t need to burn the files into a CD anymore!