- 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.
- 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.
- 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.
- 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.
- 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)
- 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).