This low frequency divider uses unijunction transistors. The bipolar transistor can be a BC548 and the zener diode Z4XL can be a 12 V zener. The circuit was found in a 1967 publication.
We found this circuit in the Texas Instruments' Linear Circuits Applications. It uses an...
With the circuit in the figure, it is possible to control the amount of heat generated by the...
This VHF receiver with three transistors and loudspeaker listening was found in European...