This simple indicator circuit was found in a documentation from the 90s. Trimpots can have values between 2k and 10k, a series resistor is recommended to limit the current to the minimum setting.
One of the most popular EPROM memories of the past is the 2716 2k x 8, whose pinout with practical use...
This circuit inverts the phase of an audio signal, maintaining its intensity. The transistors can...
In the figure we have a simple way to have a peak bargraph indicator. The amplifier is of the...