K37M
- 5 LED Multi Sequence Flasher
5 ultra bright LEDs flash in seven
patterns. Cycle through the patterns using pushbutton switch. When you find
the pattern you want operate the toggle switch to keep it flashing so long as
power is applied to the board. 3V operation. Chip-On-Board PCB. Motherboard
supplied to mount all components.
K52M
- 5 LED Random Sequence Flasher
Very small Chip-On-Board PCB just
15mm x 8mm. 3V supply. 5 LEDs flash in sequence. Push-on switch toggles the
flashing sequence on. A second push is required to turn the flashing sequence
off. Ideal for model railways. Tape up two 1.5V button cells with the PCB. Spare
COB PCB supplied. Good introduction to the electronics in today's toys and games.
Motherboard supplied to mount all components.
K163
- 12V DC Xenon Strobe
A simple kit to trigger a high voltage
xenon flashtube using a 12VDC supply. The flash rate can be varied between 1
and 2 flashes per second using an onboard potentiometer. Component value changes
can move the flash rate range faster or slower.
Uses a sidac instead of a neon tube to trigger
the flash. The sidac is a bi-directional voltage triggered switch. Some characteristics
of this device include a normal 95 to 330 volt switching point, negative resistance
range, latching characteristics at turn-on and a low on-state voltage drop.
One cycle surge current capability up to 20 amps makes the sidac an ideal product
for dumping charged capacitors through an inductor in order to generate high-voltage
pulses. Applications include light controls, high-pressure sodium lamp starters,
power oscillators and high-voltage power supplies.
K169
- Versatile PIC Flasher 
Enhance your Christmas decorations
or simply brighten your childrens' bedroom ceiling with this versatile PIC-powered
flasher display. Creates a number of different effects and powers up to eight
channels of LEDs or miniature low voltage filament bulbs. Can be added to almost
any Christmas decoration or make your own design. Safe low voltage operation
from a suitable mains adaptor.
This kit can be used to flash from 1 to 176 LEDs. The kit is supplied with 8 superbright red LEDs and 8 green LEDs. The LEDs can be arranged in any pattern as required. The board produces a random pattern and uses an onboard DIP switch to select speed (fast, medium fast, medium slow, slow), modulation (100%, 50%, 25%, 12.5%) and profile (smooth, flash).
This kit is based on the
Versatile PIC Flasher by Steve Challinor, EPE Magazine,
December 2002. The design has been modifed to use a 2803A driver chip instead
of all the transistor/resistor combinations in the original. This not only allows
for quicker and easier construction but even more LEDs than the original circuit.
The PIC source code and HEX file is available here
(ZIP file).