Found in Motorola's 1967 documentation this circuit can use any general-purpose transistor. The signal should be applied to a good amplifier. The noise diode can be replaced with a common one.
Other series amplifiers such as the MC3301, MC3401 and LM2900 can be used on this circuit. We...
The division by eight using the 4018 is made as shown here. It isn't necessary to use additional...
We found this circuit in a Popular Electronics of the 90s. The circuit still uses light bulbs, but...