The Car Voltage Gauge is based on 3 parts. The input circuit is an Analog to Digital Converter (IC2 CA3162E). The purpose of this chip is to sample an analog voltage and convert it to a decimal value which is read by a Display/Decoder Driver (IC1 CA3161E).... Read more »
This screen uses ten LEDs to display a voltage range of 10.5 to 15 volts. Each LED represents a step 0.5wvolt tension. The heart of the circuit is the 3914 points LM / bar display driver.... Read more »
The project was created to turn a multimeter into a sensitive frequency counter with a wide counting range.
An old frequency counter can be upgraded using this project and the range can be extended up to 2.5GHz. A prescaler will be described by this project with very high input sensitivity as it works up to 2.5GHz. The input frequency will be divided with either 1000 or 10.000 by the prescaler. The divider ration is set by a jumper or switch and the divided output signal is 0/5 volt and can be connected as it is to the instrument.... Read more »
A tachometer is a tool that mechanics or engineers in general use very often. A normal tachometer will be able to tell you how fast something is moving in a complete rotation. A good example is on cars, you will see a tachometer counting the RPMs of your engine.... Read more »
This project describes an easy and inexpensive way of adding a digital thermometer and data logging feature to a PC. It involves a PIC microcontroller that gets the surrounding temperature information from the Microchip MCP9701 sensor, and sends it to a PC through an USB-UART interface.
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The Car Voltage Gauge is based on 3 parts. The input circuit is an Analog to Digital Converter (IC2 CA3162E). The purpose of this chip is to sample an analog voltage and convert it to a decimal value which is read by a Display/Decoder Driver (IC1 CA3161E).
