Institute Newton C. Braga

Circuit Bench

Photo relay (CB21912E)
This circuit with the CK722 was found in a Raytheon publication from the 60's. The relay is of the...
Field intensity meter (CB7562E)
This amplified circuit was found in a magazine for radio amateurs 73 of the 90s. The circuit uses an...
AC Amplifier TL061 (CB14495E)
The circuit is from Motorola's Linear Databook from 1990, but the configuration is current because...