Long shortly bistabil switch

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Long shortly bistabil switch
Autoreset
Electronic fuse
Pickup interface
Telephone switch
Bridge
Generator sawtoothed voltage
Mosfet preregulator
On-off complex
Synchronization UC3842/43
Protection from incorrect polarity
Precise thermostat for 12V fan
Power supply 24V/20mA
Water sensor
Optic IC sensor
Timer 5 seconds
Low drop stabilizator
RMS converter
Surveyor - light comparator
Simple VCO
Opto RS232 9600bps
Interface 5V CPU on 3.3V SPI memory