We found this simple protection with zener diode in a 1967 Motorola documentation. The zener diode is 18 V, but the components can be changed for operation with other voltages.
MCP19124/5 Contains Independent Voltage and Current Control Loops Plus a Full Suite of...
This circuit is from a 1992 PE Hobbyst Handbook. The circuit fires an old electronic flash using an...
We found this circuit in an Argentine publication from the 1970s. The circuit can be used to...