This timer was found in Japanese documentation from the 1960s. The transistor can be replaced by an equivalent and the relay must be of the sensitive type with voltage according to the power supply.
Other operational amplifiers series, such as MC34072, MC34074, MC35071, MC35072, MC35074 d MC33071...
This transmitter emits signals in the FM range, reaching a few meters away. The modulation...
The consumption of this circuit in the standby condition is only 1 uA. The circuit must be...