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AN170 NE555 and NE556 applications - 555 Timer Circuits
www.555-timer-circuits.comand Q24 being large geometry transistors capable of providing 200mA with a 15V supply. While Q20 is ”off’, base drive is provided for Q22 by Q21, thus providing a high output. For the duration that the output is in a high state, the discharge transistor is ”off’. Since the collector of Q14 is typically connected to
Building your Own Zapper - Ryan McGinty
www.ryanmcginty.comFredbuster Page 4 02/02/03 Construction: It is a good idea to position all the components properly before starting to solder them. Position the NE555 at the center of the board first and bend some pins so that it does not fall when you turn
SLFS022I –SEPTEMBER 1973–REVISED SEPTEMBER …
www.ti.com1 S R R1 TRIG THRES V CC CONT RESET OUT DISCH GND 8 4 5 6 2 1 7 3 Product Folder Sample & Buy Technical Documents Tools & Software Support & Community NA555, NE555, SA555, SE555