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Datakits 80-101 thru 80-111
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Home/Car Alarm
This circuit is an alarm for the home or car door, and a lot more. It employs a magnet and reed switch to trigger the circuit; when the magnet is moved away from the reed switch, the alarm is triggered. An integral piezo sounder produces the alarm sound (100dB). And a PLUS, a relay capable of handling up to 10 amps AC is included and may be connected to turn on or off an appliance, light or external alarm sounder etc. Therefore the circuit could be used to turn on a light whenever a basement or garage door is opened.
No. 80-101 Home/Car Alarm Kit
YDI Price $14.90
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Universal Timer
Set timer for anywhere from a few seconds to about 15 minutes, control AC appliances; it will beep and trigger a relay when it has timed down. May be used for darkroom or PC board exposure timer, exit room timer etc.. Turn anything on or off. The ten amp relay can switch some larger loads such as bright lights, small AC motors etc. The circuit operates from 9 volt transistor battery.
No. 80-102 Universal Timer Kit.
YDI Price $12.90
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Photo Sensor with Control Relay
The most popular usage for this kit is to make your own nightlight; and you won't be limited to one of those dinky seven watt bulbs. You could also switch just about any appliance, either on or off, with either darkness or daylight. Light sensitivity is adjustable over quite a range. The relay can handle up to 10 amps AC. You need to add a nine volt transistor battery or a nine volt, 25 mA supply.
No. 80-103 Photo Sensor with Control Relay
YDI Price $12.90
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Stereo Preamplifier Kit
(Shown before assembly here)
Amplify any tiny audio signals about fifty times, and deliver them to a power amplifier cleanly and undistorted. An AGC (automatic gain control) eliminates pops or distortion. This circuit will be useful in boosting the output from tape heads, microphones or a magnetic phono cartridge etc.. The fidelity is very good; use for input to an audio amplifier. Requires a 12V DC power supply at about 100 mA peak.
No. 80-104 Stereo Preamplifier Kit
YDI Price $9.90
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Voice Changer
Your voice can be changed to add a vibration, like those used to disguise secret witnesses. Or, you may change your voice tone upward or downward; women sound like men and vice versa. Includes a very ROBOTIC voice as well. A microphone and speaker are included on the PC board, all that you need to add is a nine volt, transistor battery. This is a very novel and entertaining circuit.
No. 80-105 Voice Changer Kit
YDI Price $14.90
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Sound Effects Generator
Another novel circuit, that might be useful for special theatrical effects. Or, if you are simply a practical joker. The circuit can produce sounds such as the tick-tock of a grand father’s clock, a heart monitor (as in the hospital), water on a tin roof, a motor boat, cricket, etc.. Requires a 9 volt battery. Includes its own speaker.
No. 80-106 Sound Effects Generator Kit
YDI Price $9.90
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Unipolar Stepper Motor
Driver Kit
Only a photo of the PC board was available at press time; but all component parts are included.
A stepper may be used to orient a video camera, antenna, spotlight etc.. or used for table position in production. This driver will control a 5, 6 or 8 lead unipolar stepper motor (often available from surplus dealers). The circuit permits fast or slow run rate and even single stepping into final position; uses the UCN5804B IC. Four LED’s indicate movement if motor is remotely controlled (input from 6 to 35 volts). The kit is supplied with quite a bit of good information, how to identify motor connections, spec sheets and a list of references for reading about steppers etc.
No. 80-109 Stepper Motor Kit
YDI Price $49.90 Special order
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Square Wave Oscillator Kit
(PHOTO SHOWS BOARD ONLY)
This is a very simple circuit, generating square waves for use with test equipment, teaching, etc. Generates square waves of approximately 1Hz, 10Hz, 100Hz, 1KHz, 10KHz, & 100KHz. This is a good teaching aid kit, both for the instructor and the DIY user. No. 80-111 Oscillator Kit
PC Board Only pictured, but ALL parts are included.
No. 80-111 Square Wave Oscillator Kit
YDI Price $19.90
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We offer a broad range of kits for beginners, intermediate and advanced levels of Electronics Knowledge
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Prices current 12/27/2006. Prices are subject to change without notice. The products shown above are typically stocked by "You-do-it" Electronics Center. We try to maintain a current listing of current products. Occasionally products which are out of production may be listed on our website. Please E-mail Sales@youdoitelectronics.com or Call for current availability. Prices are subject to change without notice. All orders are subject to acceptance by this company & our Vendor in accordance with its standard acknowledgement form. All prices are subject to all applicable State and/or Local sales taxes. Terms are MasterCard, Visa, Discover, or American Express or Check with order, unless other arrangements are made with our credit department.
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