This circuit was obtained from the February 1992 Radio Electronics magazine. In it, a bar of 4 LEDs flashes continuously at a speed given by C1 and the setting of R3.
This is an application circuit of the Texas Instruments (2019) component datasheet itself. The...
The purpose of this circuit is to enable testing of transistors using a common multimeter. With the...
Using a 7400 we have a short-wave transmitter from 4 to 9 MHz, shown in the figure. The coil...