• Assembly instructions: Printed, included with kit • 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,
Assembly instructions: Printed, included with kit. • Function: Equivalent circuit to NE555 timer IC. Some performance characteristics differ; Refer to Abs. Maximum ...
DATASHEET
Evil Mad Scientist Laboratories / evilmadscientist.com 1285 Forgewood Ave. Sunnyvale CA 94089
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"Three Fives" and 555SE Discrete 555 Timers
Re-create one of the most classic, popular, and all-around useful chips of all time.
The "Three Fives" and 555SE Discrete 555 Timers are faithful and functional transistorscale replicas of the classic NE555 timer integrated circuit.
Design by Eric Schlaepfer (tubetime.us), working in collaboration with Evil Mad Scientist Laboratories.
The latest version of this document and additional resources about 555 timers are available at: https://wiki.evilmadscientist.com/555
Main Specifications
· Kit type: Through-hole soldering kit (Three Fives) or Surface-mount soldering kit (555SE)
· Assembly instructions: Printed, included with kit · 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
Three Fives Kit Datasheet (Rev 3.0, November 2019)
Block Diagram / Pinout
1
Kit Contents: "Three Fives" -- Through Hole soldering kit
Aluminum Display Stand (2 pieces)
Printed circuit board w/ threaded inserts.
Resistors
Transistors Completed kit
Screws and spacers for stand
Thumbscrew terminal posts: 6 gray, 1 red, 1 black
Contents of the Three Fives through-hole soldering kit: · The Three Fives printed circuit board (extra thick 0.100"), pre-fitted with eight 8-32 threaded inserts · The transistors and resistors required to assemble the kit · Eight thumbscrews (terminal posts) with color-coded cap · Two-piece "IC Legs" stand, anodized aluminum · Mounting screws and spacers for attaching the "IC Legs" stand · Printed assembly instructions (not shown)
Tools and materials required for assembly (not included with kit): · Soldering iron · Solder · Wire clippers · Phillips head screwdriver (#2 size recommended).
Kit Contents: "555SE" -- Surface mount soldering kit
Aluminum Display Stand Printed circuit board
Screws and spacers for stand
Completed kit
Threaded inserts for circuit board
Thumbscrew terminal posts: 6 gray, 1 red, 1 black
Surface mount components: Resistors (1206 size) and transistors (SOT-23 size). (Example parts, shown enlarged)
Contents of the 555SE Surface-mount Soldering Kit: · The 555SE printed circuit board (black with clear mask and visible traces) · Surface mount threaded inserts · The transistors and resistors required to assemble the kit · Eight thumbscrews (terminal posts) with color-coded caps · Single-piece "SOIC Legs" stand, anodized aluminum · Mounting screws and spacers for attaching the stand · Printed assembly instructions (not shown)
Tools and materials required for assembly (not included with kit): · Solder (paste or wire) · Soldering iron (or other surface mount soldering equipment) · Fine-point metal tweezers · Phillips head screwdriver (#1 size recommended).
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Reference
Reference
Qty TyQptey Type
ValuVealue
Q1-4, Q14-18, Q20-22, Q24
13 NPN TransisTtohrree2NFiv3e9s0K4it
Q1-4, Q14-18, Q20Q-252-1, 3Q, 2Q419A, Q19B, Q1233, Q25 NP1N3 TranPsNistPoTrransist2oNr 3920N43906
Q5-13, Q19A, Q19RB1,,QR32,3R, Q7,2R58, R9, R11,1R315 PN7P TransRisetsoisrtor, ¼ W2N3940.76 k
R1, R3, R7, R8, R9, RR211, R15
7
Re1sistor Resistor, ¼ W4.7 k820
R2
R4
1
Re1sistor Resistor, ¼ W820 1 k
R4
R5
1
Re1sistor Resistor, ¼ W1 k 10 k
R5
R6, R17
1
Re1sistor Resistor, ¼ W10 k 100 k
R6, R17
R10
R10
R12
R12
R13
R13
R14
R14
R16
1
Re1sistor Resistor, ¼ W100 k15 k
1
Re1sistor Resistor, ¼ W15 k 6.8 k
1
Re1sistor Resistor, ¼ W6.8 k3.9 k
1
Re1sistor Resistor, ¼ W3.9 k220
1
Re1sistor Resistor, ¼ W220 100
R16
1
Resistor
100
Value 555SE Kit MMBT3904 MMBT3906 4.7 k 820 1 k 10 k 100 k 15 k 6.8 k 3.9 k 220 100
Three Fives Kit Datasheet (Rev 2.0, May 2014)
3
Absolute Maximum Ratings
PRELIMINARY
Parameter Supply Voltage Output current Input voltage (Control Voltage, Threshold, Trigger, Reset pins)
Symbol VCC IO VIN
Value
Unit
18
V
± 100
mA
VCC1
Notes: 1. Exception for Three Fives kit version 1.0 (without R17) 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.
Electrical Characteristics
PRELIMINARY
Parameter
Symbol
Conditions
Supply Voltage
VCC
Supply Current
ICC VCC = 5 V, Low state
VCC = 15 V, Low state
Threshold Voltage
VTH VCC = 5 V
VCC = 15 V
Threshold Current
ITH
Trigger Voltage
VTR VCC = 5 V
VCC = 15 V
Trigger Current
ITR TRIG at 0 V
Reset Voltage1
VRST
Reset Current
IRST
Control Voltage Level
VC
VCC = 5 V
Discharge Pin Leakage
ILKG
Discharge Pin Output Voltage Low
VDL VCC = 5 V, IO = -5 mA
Output Pin Voltage High2
VOH VCC = 5 V, No load
VCC = 5 V, IO = 100 mA
VCC = 15 V, IO = 100 mA
Output Pin Voltage Low2
VOL VCC = 5 V, IO = -5 mA
VCC = 5 V, IO = -8 mA
VCC = 15 V, IO = -10 mA
VCC = 15 V, IO = -50 mA
VCC = 15 V, IO = -100 mA
Notes: 1. Specified with trigger input high. 2. For long term static operation, limit to 50 mA maximum.
Min Typ Max Unit
4
18 V
3
mA
10
3.3
V
10
10
nA
1.67
V
5
10
nA
0.4
V
0.2
mA
3.33
V
1
nA
50
mV
4.5
V
3.3
V
13.3
V
50
mV
100
mV
0.1
V
0.4
V
2
V
Example Circuits
LED flasher:
Variable-speed Larson Scanner
Repeat for LEDs #2-6
"Three Fives" Package information: 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" (4.98 mm) nominal, including threaded inserts · Overall thickness: Allow 0.5" min. clearance above and below circuit board · Mounting holes: Six #6 clearance holes provided. See drawing for locations. · Height of "DIP IC legs" stand: 1.25 inches (3.175 cm) nominal , not including spacers · Height of "DIP IC legs" stand: 1.31 inches (3.33 cm) nominal , including spacers, to bottom of PCB.
555SE Package information: Circuit board physical layout and mounting holes
2.047 1.774 1.734
.313 .274 .000
Terminal hole X8 · 4-40 tapped hole with threaded insert installed. · Bare PCB: .166" Thru
555SE
Mounting hole X4 .126" Thru (M3 Clearance) with 90° countersink
2.559 2.255 1.930 1.605
.955 .630 .305 .000
Note: All dimensions are in INCHES.
Additional physical specifications: · Printed Circuit Board size: 2.559 X 2.047 inches (6.50 X 5.20 cm) wide · PCB thickness: 0.062" (1.6 mm) nominal, not including threaded inserts · PCB thickness: 0.125" (3.2 mm) nominal, including threaded inserts · Overall thickness: Allow 0.25" min. clearance above circuit board for thumbscrews (if installed) · Mounting holes: Four M3 countersunk clearance holes provided. See drawing for locations. · Height of "SOIC legs" stand: 0.433 inches (11 mm) nominal, not including spacers · Overall height: 0.80 inches (20.2 mm), from bottom of base to top of thumbscrews
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