K9
- Oscillator Building Blocks
A learning module. Build and experiment
with astable, monostable and SR flip-flop multivibrators on the one PCB. 6 LED's
& 9V battery-powered. See and understand exactly how each works. Good introduction
to electronics.
K31
- 9V Siren
A surprisingly loud siren for such
a simple circuit. Uses voltage controlled oscillator. 1/2 Watt, 8 ohm speaker
supplied. 9V operation. Ideal to attach to an alarm system which needs an sound
module.
K48
- Introduction To Class AB Amplifiers
Using amplifier modules is modern,
quick and easy but it teaches nothing about how they work. Here is a Class AB
amplifier made from individual components which will deliver several watts of
power into an ordinary 8 ohm speaker. Gives hands-on learning about cross-over
distortion, bootstrapping, complementary pairs, and push-pull. Detailed explanations
given.
K63
- One Chip AM Radio
Complete AM radio on a PCB. Tuned
radio frequency front-end, single chip RF amplifier & detector and two stages
of amplification of the audio signal into a speaker. All components supplied.
Coil prewound. Excellent for schools.
K85
- Three-In-One Timer circuits
We provide 3 complete text book timer
circuits all in the one kit (3 PCBs). One is traditional 555 timer circuit,
the second uses a 555 to pulse a counter while the third uses the discharge
of a capacitor to time a period. (Kit 85_2 is illustrated here)
K134
- Introduction to LCDs
The main aim of this kit is to demonstrate
how to hook up and use a 16 x 2 alphanumeric LCD. In order to make the kit more
useful we have included a DS1620 Digital Thermometer/Thermostat
chip. The thermostat outputs are brought out to header pins for connection to
termperature control equipment. Use PC parallel port. 9-12VDC @ 100mA.
Two DOS-based PC programs,
written in "C" and including source code, are supplied - get them here.
1. Allows the user to write a message
to the display and scroll it left or right. Scroll rate can be set by user.
2. Display the current temperature
in Celsius or Fahrenheit. Thermostat "trip points" can also be programmed.
NEW!
Windows software combining both LCD and DS1620 control in the one application.
Screenshot. Download
Featured in December 2000 issue of
Silicon Chip (click
for article).
