Hobbyist Products

Odds'n'ends...samples, leftovers. Both AC and DC types. Excellent for surplus dealers, service shops, hobbyists, schools, experimenters, etc. No two paks alike. SUPER VALUE!

9/16" x 9/16" x 7/8" high. Ferrite bobbin is 1/4" dia. x 5/16" high and is wound with 20" of #22 insulated wire. 2 pin PC board mount. Pins spaced 5/16". p/n 4026R. Probably a KDS monitor replacement part. 96 pieces in stock.

1" diameter stepper motor rotates worm gear to raise and lower a magnetic head assembly, probably from an audio or data tape drive. The worm gear part of this device might be useful for other applications. The motor is a 6 wire, unipolar stepper. The travel of the worm gear is about 0.5". Mounted on a metal assembly 3.1" x 3.3."

This is a bare bones unit exactly as pictured. Measures; 5"W x 5-1/2"Deep x 1-1/4" Thick. Bears the following numbers on metal backing plate: ER-11BA, and 4102005. Operates with 1-3/8" dia. x 7/8" high Canon Motor with the following markings: Canon Precision Japan, SA32-110S1A, CM32-02401 and 5YGF. 8-pin male connector on one side and 6-pin female connector with insulated wire on the other. One printed circuit board bears number A44PIII. Another bears A44P263. Includes playback head. For more info or to place a sample order please call Marshall. 1000 available.

A sweet little pocket multimeter at a "silly" low price! 13 ranges; 10, 50, 250, 500VAC. 10, 50, 250, 500VDC. 50, 250MA, Ohms & dB, Complete with battery & test leads. Measures 3-1/2"L x 2-1/4"W x 1-1/4"H. Designed & engineered in the USA. Manufactured in China. So inexpensive you can afford to "sprinkle" these around the shop, lab, classroom or factory. Imported for ongoing availability.

19 range pocket digital multimeter with transistor checker and continuity buzzer. Tiny only 3-3/4"L x 1-7/8"W x 1"H. Measures AC & DC voltages and Resistance. Great for shop, lab, classroom etc. Super value.

This credit card scanner uses an optical system to read the raised numbers on a credit card into a photo array. A small AC motor drives the credit card through the reader. 5"x 5" x4". Used. With diagram.

This pre-assembled sensitive ultrasonic motion detector circuit uses a quartz crystal to lock the detector frequency for maximum stability and reliability. It was originally designed for use as a parking distance detector. It provides a digital, analog and relay output. Features; Buzzer output: fast/slow/continuous. Distance indication with 3-LED-bar. Adjustable alarm distance. LED alarm indicator. Dry contact NO/NC relay. Applications: robot projects, object detection, distance measuring, parking aid, security systems, etc. Range: 0.66 to 8 ft. Frequency 40kHz. Operates on 12VDC/200ma.

Sensor-activated robotic car. Changes direction when sensor detects noise or the car hits an object. Uses microphone as sound sensor, requires 2 1.5V AA batteries (not incl).

Robot "frog" moves forward when sound is detected and repears sequential movements: forward, stop, left, right. Comes with 2 sets of gear motors (unassembled) and takes 2 1.5V AA batteries (not incl) and a 9V battery (not incl). Special educational discounts!

Deluxe molded project box features threaded brass insters in top and bottom for security circuit board assemblies. Case is secured with 4 screws and threaded brass inserts. Top & bottom are light gray, front & back are dark gray. 7-1/2" L x 4.0" W x 2-7/8" H.

Digital multimeter with L & C function. 3 1/2-digit DMM - 10A / temperature / capacitance / frequency. Features: * 39 measuring ranges * low-battery indication and overload protection * transistor, diode and audible continuity test * DC current max. 10A, DC voltage max. 1000V * AC current max. 10A, AC voltage max. 700V * resistance measurements: up to 20Mohm * capacitance measurements: from 2n to 20µF * inductance measurements: 2m to 20H * frequency measurements: max. 20kHz * temperature test range: from -4°F to 1832°F * with TTL logic test function * with holster * K-type thermocouple measuring range: from -4°F to 1832°F (not incl)

Miniature transmitter kit attaches to phone line. Tunable to clear spot on FM band of your radio and transmits up to 200 yards or more in most installations. Uses power from the telephone line and needs no battery.

This R.F. listening device locator kit will detect any transmitter sending AM or FM, or just CW frequencies anywhere from tp to 450mHz. Peak sensitivity in the 80 to 120 MHz portion where many bugs would be found. Signal strength is indicated on a bargraph - the closer to the source, the higher the indication. Operates on a 9 volt battery for portability.

This analogue sound level meter features: 7 sound level ranges, A & C weighting for sound analysis, fast/slow response, battery level indication and RCA output jack. Specs: - positions: 60, 70, 80, 90, 100, 110, 120dB - load impedance: 1kohm min. - distortion: 2% at 1kHz, 0.5V - microphone: electret condenser microphone, omnidirectional, directionality increases at higher frequencies - precision: ± 2dB at 144dB - output signal: max. 1V deviation at 1kHz for the entire range - power supply: 1 9V battery (incl.) - battery test: OK indication between 7 and 10.5V - battery life: 110 operating hours (alkaline batteries)

Transmits in the standard FM radio band; tune to open frequency. Varactor tuning results in stable signal. Operates on 9 volt battery, picking up conversation from several feet, but can use 12V DC if going for distance.

This palm-sized anemometer comes with a neckband for easy carrying in the field. Features wind speed measurements: in mph, km/h or m/s units (min. 0.2m/sec - max. 30m/sec), shows wind speed in Beauford wind scale bar graph, has a wind chill display in ºC or ºF, a data-hold function, auto power 'off' and LCD backlight. power supply: 1 3V CR2032 battery (incl.), dimensions: 1.5" x .7" x 3.9"

Digital 3 in 1 multimeter combines functions of a multimeter, phone line tester & network cable tester. Features: 2 000 counts LCD display with automatic polarity indication, data hold function, continuity and diode test, white backlight, battery test: 1.5 / 6 / 9V, telephone line test, network cable test (RJ45). Power supply: 9V battery (incl.).

Deluxe instrument cases feature separate front and back panels, internal slots and mounting posts to hold PC boards in place. Features metal studs for non-stripping of screws holding case together. Two colors: solid black, or gray top w/black front & back panels. STK# DIMS - L,W,H COLOR GD203 8.0" x 6-1/4" x 2-1/2" Black GD204 10-1/8" x 7-3/8" x 3-3/8" Black/gray

This powerful circuit operates on very low voltage - just two AA cells - and can be operated on up to 9V. Has range of 100 meters, 500 with good antenna. Transmits to FM radio band, microphone included.

This powerful little circuit with good audio quality can tranmit up to 1/2 mile in open country. Electret microphone adds sensitivity. Use 9 volts with short antenna wire.

Use this AC-DC P.A. amplifier in a mobile or fixed location in a variety of ways. Features two low impedance microphone inputs, auxiliary input for cassettes, reel-to-reel tape recorders, phonos and CD players, special music input for musical instruments, tuners and audio decks. Has gain controls for 3 sources of audio including 2 independent mike mixing controls. Specs: - Power output: 30 watts RMS @ 2% THO - Frequency response: 50 - 18,000 Hz - Line outputs: 25 volts & 70 volts - Output impedance: 4-8-16 ohms - Power requirements: 12VDC for mobile use (pos or neg ground) and / or 117VAC 50-60 Hz for fixed stations.

130-in-1 electronic lab kit is a great introduction to electronics. No experience required, coil-spring connections make it safe and easy to use. Includes manual for easy project constrution. Comes with built-in speaker, 7-segment LED display and two fully integrated circuits & rotary controls. Power supply: 1 1.5V AA batteries (not incl).

300-in-1 electronic lab kit is a great introduction fo the world of advanced electronics. Safe and solderless, allows for easily building 300 exciting circuits. Includes practical, illustrated lab-style manual. Power supply: 6 1.5V AA-batteries (not incl.)