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Acme Relays and Magnetic Parts

Multi-voltage relays are devices designed to work for wide voltage ranges such as 24 to 240 VAC and VDC and wide frequency ranges such as 0 to 300 Hz. They are indicated for use in installations that do not have stable supply voltages.  A simple electromagnetic relay consists of a coil of wire wrapped around a soft iron core (a solenoid)…

on: 7/22/2021

EE Basics

Function Generator using the CA3140

Here is a complete project which will help in learning to apply the CA3140 in a small instrument that could be used in your test bench along with the oscilloscope. It is necessary to study the datasheet for understanding the device and this application with full details. A function generator having a wide tuning range is shown in Figure 10. The 1,000,000/1 adjustment range is accomplished by a single variable potentiometer or by an auxiliary sweeping signal. 

on: 8/8/2019

7800 and 7900 Series Voltage Regulators

The LM78XX series of three-terminal positive regulators is available in the TO-220 package and with several fixed output voltages, making them useful in a wide range of applications. Each type employs internal current limiting, thermal shut-down, and safe operating area protection. In Instrumentation and Industrial Circuits where Size is not a problem and the current or power usage is less. A Mains transformer, bridge regulators, capacitors and these regulators are a time tested low noise and robust system.

on: 7/29/2019