a division of Milestone Technologies, Inc.
"Everything for the Morse Enthusiast!"
We are now distributing a limited range of the well-known kits from Electronic Rainbow. Please note that our minimum order on credit card purchases is $10.00.
|Morse Code Practice Oscillator||1W Audio Amplifier||Stereo Audio Amplifier
|DC Voltage Monitor||AC Voltage Monitor||IR Transmitter/Receiver|
|Active Antenna Kit||Sine Wave Oscillator||Voice Operated Switch|
|Jumbo Blinkey Lights||Blinking LEDs|
Learn to send Morse code!
this easy little kit and learn
to send Morse code! It's an LM555 timer-based code practice oscillator
or "beeper." Easy to build kit is complete with printed circuit board,
all parts including off-board speaker and battery clip , schematic, and
instructions. All you need to add is a battery and an inexpensive
key-- e.g. the AMECO
or K-4. Power requirement +9VDC, size
2.5" x 1.5"
OSC-3 Code practice oscillator kit. $8.95See also the new MX T-Tone Code Practice Oscillator Kit
Hear DX with ease!
Build the Rainbow Active Antenna kit, extend the included whip antenna, and connect the equivalent of a 60' wire antenna. Amplifies signals on HF, VHF and short wave, with effective gain from 1MHz to 100MHz. Features RCA phono jacks for connection to receiver and (optional) external antenna and has a front-panel gain control. This is the "board kit" version and the optional enclosure is no longer available.
Power requirement +9VDC
or use a 7-15VDC wall transformer. Board size
4.2" x 4.6"
ACA1 Active Antenna Kit $44.95
Stereo Audio Amplifier Kit
This kit teaches how stereo amplifiers take a small signal and "magnify" it to drive two small speakers or stereo headphones. It's based on two LM386 Low Voltage Power Amplifier and one LM1458 operational amplifier IC. This kit gives you a good quality Stereo Amplifier. You can use it as an intercom, a booster amp for portable CD players, or in your robot. You can also use it to add sound effects for plays or practical jokes. Power requirement is 5 to 10v DC, size 2.25" x 2.75"EBST-11 Stereo Audio Amplifier Kit. $12.95
1W Audio Amplifier Kit
This amplifier will operate from 3 Volts. It makes a perfect companion for your portable audio player. This amplifier will provide up to 1.2 Watts output power. Complete with a volume control. This will work great on any project where you need to amplify an audio signal. You supply an 8 ohm speaker or headphones for output. Power requirement: 3 to 18v DC. Printed Circuit Board Size: 1.15" x 1.15"AP-1W Audio Amplifier Kit. $8.95
Sine waves are "pure" audio tones
typically used to test
audio equipment. This audio oscillator kit produces sine wave audio
Output amplitude and frequency are adjustable. You can use
to learn the "signal injection" method of audio-circuit
The manual gives a lot of detail about the operation of the circuit
a Wien Bridge Oscillator using an LM1458 op-amp) and detailed
instructions. The EBAO-3 will come up with a range of around 400-500Hz
depending on component tolerances, but insructions are included for
changing the range. Power requirement +9 VDC, size 2.25" x 2.75"
EBAO-3 Audio Oscillator Kit. $9.95See also the new MX T-Tone Code Practice Oscillator
For calibration, the VM-2 lot requires a DVM like our inexpensive MX-DVM2.
|VM-2 DC 5,8,or12V voltage monitor board kit. $7.95|
AC Voltage Monitor
|VM-110 AC line voltage monitor board kit $7.95|
These are just great for a "simulated burglar alarm" and to dress up kids' toys, and probably other uses we haven't thought of. The LEDs flash alternately. The MB-3 kit includes two yellow, two red, and two green LEDs so you can choose your own "style;" while the RB-3 contains two BIG (5mm) red LEDs. And at this price, you need two!
Power requirement 9 to 12v DC. SIZE: .75" x 1"
|MB-3 Flashing LEDs, 3mm, board kit, choose colors. $3.95|
|RB-3 Flashing RED LEDs, 5mm, board kit. $3.95|
JUMBO flashing LEDs!
These Jumbo LEDs are great for signs or as attention getters. The kit includes 2 Jumbo (10mm) alternate flashing LEDs, in your choice of red or green. The kit includes the four printed cartoons shown, which slip over the LEDs for a comic effect.
Power requirement 9 to 12v DC. SIZE: .75" x 1"
|DJRB3 Flashing LEDs kit, 10mm, RED $5.95|
|DJGB3 Flashing LEDs kit, 10mm, GREEN $5.95|
Use sound to turn something on or off. Or on and off! This VOX circuit can be used to control a radio, tape recorder, or alarm. With 100mA output the VOX-1 will operate many devices directly, or add a relay or power transistor to handle higher current applications. Circuit board size is 1.5 x 3" and the circuit requires 7.5 to 18VDC.
VOX-1 Voice Operated Switch board kit. $6.95
This two-board kit transmists a modulated 40KHz IR signal to a distance of 6 to 8 feet. Use it for a door alarm, or to turn things on and off by remote control. The output can be configured for normally on or normally off operation. You can also use it to test IR remote controls. It runs on 6-12VDC and the transmitter and receiver boards measure 1 x .75" anmd 1.4 x 1.2" respectively.
IR-2 Infrared Transmitter/Receiver kit. $22.95
or call 303-752-3382 for more information