Operating principles and practical applications of a variety of optocoupler devices.
FET (Field-Effect Transistor) basics. Part 1 of 4
Using the ‘555 timer IC’ in a variety of useful astable multivibrator or squarewave generator applications.
Practical MOSFET and CMOS circuits. Part 3 of 4
One of the most popular types of multi-LED indicator circuits is the so called analog-value indicator or ‘graph’ display. Here is a variety of practical LED dot-graph and bar-graph analog-value display circuits.
Practical JFET circuits. Part 2 of 4
555 timer IC basics and ways of using it in monostable applications.
The LED chaser or sequencer is one of the most popular types of LED-driving circuits and is widely used in advertising displays and in running-light ‘rope’ displays.
The most widely used of all optoelectronic devices is the simple LED (light emitting diode). Here is a presentation of a variety of indicator and flasher circuits using LEDs.
Practical VMOS power FET circuits and appplications. Part 4 of 4
Use the ‘555 timer IC’ in unusual applications such as Schmitt triggers, astable gadgets, alarms, and long-period timers.
Basic operating principles and applications of light-sensitive devices.
Checking the water in the Christmas Tree need not require laying upside down getting poked in the head by pine needles!
by Joseph J. Carr
Signal Generators — Part 1
Used to test and troubleshoot radio receivers and other circuits, signal generators are of primary interest to almost everyone interested in electronics. Part 1