Cable Test (CB25206E)

Found in the March 1989 issue of Radio Electronics magazine, this circuit is used to test printer and other cables. The indication is made by LEDs.

| Clique na imagem para ampliar |

Crystal switched oscillator (CB9632E)
This oscillator with crystal for overtone operation was found in an old American documentation. The coil...
Basic PLL (CB21757E)
In the figure we have a basic PLL circuit with the LM567 or equivalent. The circuit is from a 1977...
DC and Stepper Motor Controls with the A3906 (CB23592E)
The A3906 integrated circuit from Allegro MicroSystems (www.allegro.com) consists of a single...