This sequential beacon was found in an 80's Radio Electronics. The circuit can be designed using modern equivalent components. Triacs shall be fitted with heat sinks.
This is a circuit published in the patent section of the April 1961 Radio Electronics magazine. The...
The cut-off frequency of the filter shown in the figure can be adjusted to values between...
This circuit is from a 1976l filter cookbook. The circuit has a factor Q = 3, and must be supplied...