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 circuit sensor is an NTC with a resistance of the order of 2k. The SCR can be from the TIC...
The load current can be adjusted up to about 1 A. The transistor can be TIP32 or TIP42. The...
This oscillator with common general-purpose transistors appeared in Radio Electronics magazine in...