1.LED FLASHER 2 DOT
This flasher circuit is a fundamental circuit suitable for those who are interested in studying electronics as well as its performances. It is a low-cost product composed of few components: two alternate LED flashers of which flash frequencies are adjustable.
2.6 ALARM SOUND SIREN
The six digitized alarm sounds of the FK278 are held permanently in a masked Read Only Memory (ROM) in a decoder IC. A transistor output amplifier drives the supplied 8 ohm 0.25W speaker for a demanding sound suitable for toys and novelty applications.