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| Electronic Project Kits |
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PLL EXPERIMENTER KIT FROM
KHZ TO 185MHZ An exciting circuit, the PLL Experimenter kit may be used for making a stable AM or FM trasmitter, a Signal Generator (from low kHz to about 185mHz), a QRP Ham transmitter, circuit diagrams for all these included. What you get is a very high quality PLL circuit module, with touch-tone style keyboard (to set frequency) and you will have to add the components for the circuits mentioned above. Crystals can be expensive; this is the answer. Not a beginners kit; intended for the serious experimenter, Hams or very advanced beginner. Operation from 8 to 12V DC; a nine volt battery is ideal. Fine tuning in 10 kHz steps. Extra room on board for added components. This circuit is really worth having! 80-035 ................................. $39.95 |
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PLL TUNED FM-STEREO TRANSMITTER Try this with your computer to re-transmit internet radio! This is truly a slick product! The PLL (phase locked loop) tuning means stable broadcasting, which results in big advantges. Being on frequency and drift-free equals much better transmit distance and receive quality. Frequency is “entered-in” on a keyboard, the unit stays exactly on frequency. Transmit to your portable radio! For input use your CD player or tape player or your computer so that you can broadcast programming on the internet to your portable radio; listen anywhere around the home. Operates on 9 to 12 Volts DC. 80-055 ................................. $79.95 |
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3 VOLT FM TRANSMITTER The most powerful circuit we’ve seen that operates on such low voltage (just two AA cells). A range of 100 meter scan be expected and given a good antenna and good conditions, 500 meters is not unusual. Can be operated on up to about 9 volts. Transmits to the FM radio band. Teaches basics of transmitters. Microphone is included. 80-070................................. $10.95 |
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FM STEREO TRANSMITTER This is a circuit that will broadcast CD quality to your FM Walkman, home stereo or automobile radio. It produces a strong signal that will generally cover the average home and yard. It is stable enough to use even with a digitally tuned fm receiver. Typical uses include broadcasting your own music to a receiver at poolside or in the garden. Or you can broadcast from a personal, portable CD player to a car radio that has no CD player. School uses include running a “broadcast station” from another room as a speech class exercise. The unit is powered by a 9V transistor battery or an AC adaptor. 80-060 ................................. $39.95 |
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DC ELECTRIC MOTOR KIT An introduction to the workings of an electric motor. A few pieces of metal, some wire and then add your own 1.5 volt AA battery and the whole concept of what makes an electric motor run will be yours. A number of experiments are included in the instructions, which the teacher could use to get young minds wrapped up in this project. Snaps together, no soldering required. (Kit shown in knocked-down form.) 80-077 ................................. $15.95 |
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VARACTOR TUNED FM TRANSMITTER WIRELESS MIKE KIT This is the Cadillac of FM transmitters, and wireless mikes. Transmit the standard FM radio band; tune to open frequency. Varactor tuning results in stable signal, free from stray capacitance and drifting. Sensitive, picks up conversations from several feet. Powerful operation on a nine volt battery but could use 12V DC if you are going for distance. Easy to build, good for teaching beginners with just a bit of supervision. 80-065 ................................. $14.95 |
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CONTINUITY TESTER This most often needed piece of test equipment checks continuity at two switchable settings: 2.8 or 185 ohms. The unit will buzz when a continuity below the set resistance is encountered. Based around the LM324 op-amp IC. This kit is wonderful for beginners that need to learn to solder, identify components and finally end up with basic teat equipment circuit that will be useful as they continue their education. (shown the PC board only; the kit includes all parts except 9 volt battery). 80-110 ................................... $8.95 |
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12 BIT DATA ACQUISITION
SYSTEM The circuit, once built, connects to the parallel port of a PC for data input/output. Uses the Maxim 186 IC; collect analog and digital information and store them on the hard drive. Included software can display and interpret the data, provide trends etc.. This is a very sophisticated little device and software (good Science Fair stuff too). Manuals and software are zipped on included diskette. This is for somewhat sophisticated users that know their way around a PC fairly well. Not for beginners. Power with 9 or 12V DC. 80-118................................... $79.95 |