Data Sheet

ManualsBrandsEvil Mad Scientist ManualsSoldering Kits"The Three Fives" Discrete 555 Timer Soldering Kit

Three Fives KitDatasheet (Rev 2.01, August 2014) 1

The “Three Fives” Discrete 555 Timer kit is a

faithful and functional transistor-scale replica of

the classic NE555 timer integrated circuit.

collaboration with Evil Mad Scientist Laboratories.

Main Speciﬁcations

• Kit type: Through-hole soldering kit

• Assembly instructions: Printed, included with kit

• Assembly time: 30-60 minutes (typical)

• Function: Equivalent circuit to NE555 timer IC.

Some performance characteristics differ; Refer to Abs.

Maximum ratings and Electrical Characteristics

• RoHS compliance: All kit components are RoHS

compliant (lead free)

• Connection methods: Terminal posts (bare wire, lug,

or alligator clip) or solder

The “Three Fives”

Discrete 555 Timer

Evil Mad Scientist Laboratories / evilmadscientist.com

175 San Lazaro Ave., Ste. 150 Sunnyvale CA 94086

Questions? Please contact us: sales@evilmadscientist.com

DATASHEET

Block Diagram / Pinout

Re-create one of the most classic, popular,

and all-around useful chips of all time.

Kit version 2.0

Summary of content (8 pages)

PAGE 1
Evil Mad Scientist Laboratories / evilmadscientist.com 175 San Lazaro Ave., Ste. 150 Sunnyvale CA 94086 Questions? Please contact us: sales@evilmadscientist.com DATASHEET The “Three Fives” Discrete 555 Timer Kit version 2.0 Re-create one of the most classic, popular, and all-around useful chips of all time. The “Three Fives” Discrete 555 Timer kit is a faithful and functional transistor-scale replica of the classic NE555 timer integrated circuit.
PAGE 2
Kit Contents Aluminum Display Stand (2 pieces) Printed circuit board w/ threaded inserts. Transistors Resistors Screws and spacers for stand Thumbscrew terminal posts: 6 gray, 1 red, 1 black Contents of the Three Fives kit: • The Three Fives printed circuit board (extra thick 0.
PAGE 3
Schematic Diagram + ,-+(.$ (/0' ' ( 1"", (/0' ' ( 2.10 2.
PAGE 4
Parameter Supply Voltage Output current IN AR Y Absolute Maximum Ratings Input voltage (Control Voltage, Threshold, Trigger, Reset pins) Symbol Value VCC 18 IO ± 100 VIN Unit V mA VCC1 PR EL IM Notes: 1. Exception for kit version 1.0 (without R17 and notch in PCB outline) only: Input voltage at reset pin (VRST) should be kept to lesser of VCC or 6.6 V. For VCC > 6.6 V, Reset pin may be pulled up to Vcc through a 100 kilohm resistor. Three Fives Kit Datasheet (Rev 2.
PAGE 5
Parameter Symbol Supply Voltage VCC Supply Current ICC Threshold Voltage VTH Threshold Current ITH Trigger Voltage VTR ITR Reset Voltage1 VRST Reset Current IRST Conditions VC Min Typ 4 VCC = 5 V, Low state 3 VCC = 15 V, Low state 10 VCC = 5 V 3.3 VCC = 15 V 10.0 Max 18 Unit V mA V 10 nA VCC = 5 V 1.67 V VCC = 15 V 5.0 TRIG at 0 V 10 nA 0.4 V 0.2 mA 3.
PAGE 6
Printed Circuit Board: Physical layout and mounting holes Terminal hole X8 • PCB in kit has 8-32 threaded insert (PEM #KF2-832-ET) pre-installed. • Bare PCB: .250” Thru Mounting hole X6 .145” Thru (#6 Clearance) Note: All dimensions are in INCHES. Additional physical speciﬁcations: • • • • • • • Printed Circuit Board size: 5.215 X 3.175 inches (13.25 X 8.06 cm) wide PCB thickness: 0.100" (2.54 mm) nominal, not including threaded inserts PCB thickness: 0.196" (4.
PAGE 7
Additional Photos Bare PCB Assembled PCB with stand (Terminal posts removed) Assembled kit with stand and terminal posts (top view) Three Fives Kit Datasheet (Rev 2.
PAGE 8
Suggested Circuits LED ﬂasher: Variable-speed Larson Scanner Repeat for LEDs #2-6 Three Fives Kit Datasheet (Rev 2.