ThumbStadiumTM Electronic Game Kit
THUMBSTADIUM1K - ThumbStadium, Kit and Plans.............. $19.95
THUMBSTADIUM10 - ThumbStadium, Assembled.................. $29.95
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4 Watt FM Voice Transmitter
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3 RF and 1 audio stage delivers 4 watts to a open dipole or ground plane antenna. Operates from 12 to 18 VDC.
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Requires License For Use In The USA
SIM1028 - Kit/Plans................ $59.95
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60 Watt High Fidelity Amplifier
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High performance circuit with protection. Amp factor: 24x. / Sens: .7 to 1.5v. / Freq resp: 5Hz to 35 Hz. / Dist: .1%. Operates 40 VDC.
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SIM1033 - Kit/Plans................ $49.50
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Car Battery Checker
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A very simple, inexpensive and easy to build circuit that once installed will monitor constantly the state of charge of your car's battery and will protect you from unpleasant "surprises." Very small in size, can be fitted easily in every dashboard. Operating voltage: 12VDC. Max current: 40mA.
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SIM1034 - Kit/Plans................ $9.95
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Transistor Tester
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This will help you sort the transistors you have, and will also help choose the best of them for your projects. It will also show you if the transistor is PNP or NPN. The circuit can also be used to check some types of diodes. Can fit into a small box for a portable tester. Runs off a 9V DC battery.
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SIM1036 - Kit/Plans................ $9.95
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Electronic Car Ignition
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A useful project for the car. It will help you to improve your car performance and at the same time it will reduce maintenance cost as the use of an electronic ignition system reduces wear of distributor contacts and prolongs the useful life of the spark-plugs. The fuel consumption is also reduced and the car starts a lot easier on cold days. Supply voltage: 12VDC.
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SIM1058 - Kit/Plans................ $39.95
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100 Watt Hi-Fi Power Amplifier
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Our most powerful Hi-Fi amplifier. It uses very high quality Darlington power transistors in the output, it is fully protected, and the sound quality is exceptionally good. It is offered complete with a large heatsink. It can be used with kits SIM1023, 1032, 1043, 1050, 1070, 1071. Suitable power supply is the SIM1060. Supply voltage: ~40VDC. Frequency response: 10Hz-45kHz. Distortion: 0.05%.
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SIM1077 - Kit/Plans................ $69.95
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Video Signal Amplifier
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Handy little amplifier solves those low signal level problems when using multiple VCRs for tape duplicating. Unit has one input and three outputs.
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SIM1083 - Kit/Plans................ $19.50
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Power Supply 18V/0.5A
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A general purpose stabilized power supply with an output of 18V/0.5A. Uses the 7818 Voltage Regulator IC. Suitable for SIM1023, 1024, 1028, 1038, 1052. Requires an 18V/0.5A transformer (not included).
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SIM1068 - Kit/Plans................ $9.95
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12Volt Fluorescent Lamp Driver
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Universal high frequency circuit powers any fluorescent tube from 8 to 40 watts to full brilliance. Operates from 11-16 VDC. Great for camping.
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SIM1069 - Kit/Plans................ $29.50
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Automotive Negative Ionizer
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Bring nature into your car as fresh and healthy negative ions. Refreshes air by removing toxic pollutants of exhausts etc.
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SIM1092 - Kit/Plans................ $49.95
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Digital Thermometer with LCD
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A digital thermometer with liquid crystal display suitable for the measurement of temperatures from -30 to +125C. It is built around the 7106 ADC IC. It has a very low power consumption, approximately 1.5mA, which makes possible the use of the thermometer with a small 9V battery that will last for many hours of continuous use.
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SIM1098 - Kit/Plans................ $19.95
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Light-Activated Switch
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A simple circuit suitable for many applications where the ambient light level activates the switch -- for alarms, production control, remote controls, external (and internal) lighting, etc. The circuit uses a light-dependent resistor that changes its value according to the amount of light it receives, and 3 transistors which are used to amplify the signals from the LDR and to operate a relay capable of switching loads of up to 250V and 2A. Operating voltage: 12VDC. Max current: 50mA.
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SIM1004
- Kit/Plans.............. $9.95
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1 Watt FM Voice Transmitter
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Operates from a 8 to 30 VDC. Includes a piezo electric mike. Easily connects to a simple dipole antenna providing surprising range.
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Requires License For Use In The USA
SIM1009
- Kit/Plans.............. $49.95
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Ultra Sensitive Mike Preamp
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General purpose microphone preamp suitable for dynamic, electrostatic and electret. Frequency response 50Hz-15KHz. Distortion .5%.
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SIM1024 - Kit/Plans................ $9.50
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TV Antenna Amplifier
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Broadband amplifier pulls in those distant weak and snowy TV stations. Great for extending the range of low powered video transmitters.
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SIM1084 - Kit/Plans................ $14.95
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Disco Strobe Light-Freezes Motion
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High brightness variable rate output produces weird and bizzare special effects. Strobe rate is variable from 1 to 60 Hz. Operates from 220 VAC.
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SIM1037 - Kit/Plans................ $39.95
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Bet Decision Maker
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Electronic marvel statiscally makes those betting decisions that automatically improves your odds of winning. A very worthwhile device around those playoff games.
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SIM1107 - Kit/Plans................ $19.50
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Logic Probe
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A must for those who work with digital circuits. It will detect and display logic states of "1" and "0" by lighting respective LEDs and will also give an indication with a third LED if it detects a pulse train. Suitable for TTL and CMOS circuits. Operating voltage: 8-15VDC. Max. current: 20mA.
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SIM1111 - Kit/Plans................ $12.95
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4 Sound Electronic Siren
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Produces a single tone or polyphonic such as that of police, FBI, and ambulance. Easily connects to any speaker 8 to 25 ohms. Ideal for all alarm systems.
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SIM1029 - Kit/Plans................ $19.50
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Pulse Telephone Lock
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A project that will help you control the use of your telephone and keep your bill low. It can be connected on the phone line and disable the dialing beyond the 8th digit. Thus it is impossible for anyone to make a long-distance call unless you allow it. It can also disable dialing from the 5th digit so it is impossible to make anything but operator calls. It draws power from the telephone line. Very useful for public telephones, in businesses, shops, etc.
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SIM1125 - Kit/Plans................ $9.95
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Negative Ion Generator
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The use of this circuit will benefit your health and give you a feeling of comfort. It helps clean the air from dust, pollen, smoke and pollution. The increased concentration of negative ions in the air makes it feel fresher, brings a feeling of well being, helps in reducing stress and effectively reduces the severity of symptoms in some respiratory troubles. It is also of benefit to animals and plants. Supply voltage: 220VAC. Current: 100mA.
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SIM1129 - Kit/Plans................ $17.95
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Superlight 3-Channel Light Effect
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This is a useful construction for light effects. It can easily be connected with an amplifier from 1-100 Watt or another audio equipment. Three optocouplers are used to link this modulator with the audio source isolating at the same time the two circuits completely. It has three channels for low, mid, and high frequencies. Power: 600W/channel. Input voltage: 2.5-28V AF. Current consumption: 4VA. Input resistance: 500K. Supply voltage: 220V.
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SIM1132 - Kit/Plans................ $24.95
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Telephone "Bug" Transmitter
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Suitable for listening to telephone conversations in a small distance around the transmission point. It starts transmitting as soon as the receiver is picked up, and is powered from the telephone line.
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Use of this device may be illegal in your country/state.
Please be aware of and follow all laws before use.
SIM1135 - Kit/Plans................ $9.95
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Linear 15W VHF Amplifier
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The ideal way for transmission in small areas without spending a lot of money. A linear VHF amplifier for transmitters with 88-108 MHz frequency modulation (FM). The circuit is based on high frequency transistors leading to a BLY88, and ensures a power of 15 Watts in the antenna. Easy tuning. Power supply: 18VDC. Consumption: 2A max.
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SIM1179A - Assembled................ $19.95
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Linear VHF 3W Amplifier
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The ideal way to extend the range and capabilities of your transmitter without spending a lot of money. A linear VHF amplifier for transmitters with 88-108 MHz frequency modulation (FM). The circuit is based on high frequency transistors leading to a BFS22A, and ensures a power of 3 Watts in the antenna. Easy tuning. If you use the 1187 along with the kit 1144, you have a complete PLL transmitter that can drive a linear amplifier for even more power. Power supply: 24-30VDC. Consumption: 100mA max.
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SIM1187 - Kit/Plans................ $19.95
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