We found this circuit in a Philips documentation from 1965. The circuit uses a common LDR sensor and the transistors are general purpose types. TR2 can be a BD135.
This system of sequential lights for shop windows, discotheques, stores, does not use integrated...
This circuit was found in an Elektor from the 90s. Next to the circuit we have a table with the...
This sensor was published in Radio Electronics magazine in April 1962. The two-transistor circuit...