Intermittent buzzer (CB20494E)

This two-tone buzzer can be powered by a solar panel. The circuit is from a 1991 documentation. The transistor is a general-purpose type.

Microchip’s UNICENS Software Makes Interfacing to High-Speed Infotainment In-Vehicle Networks Easy and Flexible
Standardized Software API and Flexible Device Control Methods Allow Customers to Focus on...
Power Supply with SCR from 0 to 16 V x 5 A (CB3842E)
We found this thyristor power supply in a 1987 documentation. It uses common SCRs as rectifiers and...
2SS100x Barrier Schottky Diodes
August 2017 - Rectron's Schottky Barrier Diodes can now be obtained from Mouser Electronics. The...