411C
Size: 8.0" x 2.2" x 1.6"
411: Telephone Kit
Clear and white models
Pulse and tone dialing
2-color student manual
Highest education content
Lowest prices
411C (Clear) has colorful neon lamps that flash when the phone rings. Both models include comprehensive 2-color, 40-page manual that teaches telephone history and operation from the early telegraph to the modern-day telephone company central office. Step-by-step instructions and 49 2-color illustrations guarantee student success. Includes 2 PCBs, high-tech IC, transistors, diodes, high-performance microphone, conductive rubber keypad, wall mount cradle, baseboard mounting jack, and more!
LCFTNO(14) LCFTNORLC3
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523
523: With Breadboard
Variable flash control
32-page student manual
AC operated
Graymark's Model 523 Strobe Light is an intermediate project that covers basic electronics theory in the areas of RC timing circuits, gas filled tubes, voltage doublers, and much more. The flash speed is adjustable from 1 to 5 flashes per second and tube life is about 500,000 flashes.
LCFTNO(52) LCFTNORLC3 

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218
 Size: 2.50" x 5.75" x 1.50"   
218: Digital Multimeter Kit
 Full 3-1/2 digit display
Data hold/peak hold with LCD annunciators
Transistor test jack
Short circuit beeper
20-range function
Comprehensive student manual
Zero reading with zero input guaranteed
Polarity driver
Analog to digital conversion
Frequency counter
The 218DMM is an excellent choice for educational electronic theory and project design. With comprehensive instructions, students will learn digital electronic theory and acquire hands-on skills through step by step assembly procedures. When assembled 218 DMM is a rugged, high reliable measuring instrument that's ideal for electronic maintenance and troubleshooting.

Ranges:
DC Voltage Range: 200mV to 500V
AC Voltage Range: 200mV to 500V
DC Current Range: 200µA to 10A
Resistance Range: 0O to 200MO
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 216
216: with Breadboard
20kO/V
30 ranges
Test transistor
Leakage and gain
Diode and fuse protected
Mirrored scale
Comprehensive student manual
Zero adjust
Accurate, rugged and versatile, the Model 216 becomes a useful piece of test equipment when assembled. Use it to troubleshoot electronic equipment, for laboratory experiments, and to aid in the building of other Graymark projects. This intermediate kit covers all aspects of analog meter theory including current limiting resistors, voltage dividers, diode rectification and meter protection. How meter movements work is also explained. Requires a 9V battery and two AA cells (not included).

 Ranges:
DC Voltage: 1, .5, 2.5, 10, 50, 250, and 1000
AC Voltage: 10, 50 250, and 1000
DC Current: 50µA, 2.5mA, 25mA, 250mA
Resistance: X1, X10, X100, X1k and X10k
Decibels: -10dB to +50dB in 3 ranges
ICEO: 150µA, 1.5mA, 15mA
hFE: 0-1000
Diode: 150µA, 1.5mA, 15mA
Order No. 64616: Transistor Adapter (optional),
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601A: "Scooter" Sound Controlled Robot
Arduino Adaptable
Fast-paced excitement
Sensitive microphone
Changes direction when you clap your hands or when it hits an object
This speedy robot keeps banging into objects, but each time it does, it momentarily shifts into reverse and then heads off in a new direction.
YOU can also make it change direction with a loud sound such as clapping your hands.
Learn motor theory, transistor switching and R/C time constant circuits. The 24-page 2-color Instruction Manual features step-by-step instructions, schematic and block diagrams, self-test and troubleshooting guide. Requires 2 AA batteries (not included).
LCFTNO(11) LCFTNORLC3
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 606A: "Scrambler" All Terrain Robot
Arduino Adaptable
 High-tech infrared beam
Avoids objects in its path
Walks over rough terrain
Fun to watch
2 motors
This 6-legged Robot walks in a straight line until it sees an object in its path. The Robot's eye, a state-of-the-art infrared beam like those used in alarm system motion detectors, sees the object and alerts the motor control circuits which alter the Robot's course to avoid the object.
The 32-page Instruction Manual discusses infrared beams, operational amplifiers, photodetectors, motor control theory and more. Illustrated assembly instructions, schematic and block diagrams, quick and troubleshooting guide complete the Manual. Requires one 9V and four AA batteries (not included).
LCFTNO(62) LCFTNORLC3
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NEW  GUN CASE, STURDY PANEL
BLACK LEATHER LOOK
COMBINATION LOCKING 17.5 X 12.5 X 4.5  
CAN BE SET TWO DIFFERENT COMBINATIONS,
PADDED TOP AND BOTTOM BRAND NEW.
EXCELLENT STYLISH AND STURDY LOCKING CASE.
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NEW HARD GUN/TOOL CASE,  LOCKING  WITH KEYS,
ADJUSTABLE PADDED PARTITIONS,
TWO KEYS,
REMOVABLE (VELCROS IN LID) TOOL HOLDER,
SHOULDER STRAP
 17.5 X 12.75 X 6"  
ALUMINUM RAIL, STURDY METAL LOCKS,
CASE LAYS FLAT AND SITS ON CONICAL FEET,
STURDY HARD PANEL S
BRAND NEW.
EXCELLENT RUGGED AND STURDY LOCKING CASE.
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 202: Capacitance Substitution Kit
Fast, accurate selection of 9 different capacitance values from .0001 to .22 microfarads.
Very useful project for troubleshooting or designing circuits.
Capacitors are rated at 400V or higher.
Size: 4.75" x 2.90" x 1.75"
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613A: Parallel Interface Kit
Mates with Centronics parallel printer cable.
All parts, PCB, case and Instruction Book are included.
Requires one 9V battery (not included).