This circuit is from a 1965 Radio Electronics. The triggering transformer generates high voltage pulses. The generated light pulse depends on C1 and C2.
With this name, the English publication where we found this circuit indicated a sensitive touch...
Books and e-Books by Institute NCB 100 CIRCUITS - SHIELDS FOR ARDUINO FUN PROJECTS FOR THE...
In the circuit shown in the figure when we press S1, capacitor C1 charges slowly, and with that it...