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We found this circuit in a PE Hobbyst Handbook from the 90s. The components are common, except the Geiger tube. The transformer is also a component that requires care when choosing.
Found in a publication from the 50's, this circuit uses a germanium transistor of the time. The...
This battery charger is suggested by National and has a switch that turns it off when the battery is...
The reference voltage for this circuit can be selected digitally. The circuit is from Radio...