Elektronische Lötkolbenregelung (Thermoelement, Triac)

The automatic call-sign generator, which was published in Elektor 10, February 1976, relieved radio amateurs of the chore of having to periodically repeat their call-sign during a OSO. The circuit described here, which is an extension to the above call generator, allows the operator to automatically transmit a number of pre-progra~med morse-encoded messages.