|
Mains Operated Christmas Star - (electronic Circuit / Schematic added 10/04) |
|
Marx Flasher - Scroll down to find this circuits. Here is a strange-looking
flasher that uses an unusual form of the Marx high voltage multiplier. The traditional
Marx multiplier uses spark gaps to repetitively charge capacitors from a high voltage
supply (in parallel) then to suddenly connect them in series to generate a much
higher voltage, near N times the supply voltage …..(added 07/07/07) |
|
Matrix LED Display - A mini display using an array de 5x24 LEDs using Microchip
PIC 16F628. (added circuit 10/04) |
|
McMurtrie's Self Powered Flashing LED - circuit which uses a LED as solar panel to
charge a capacitor which flashes a LED, the LED will blink when the circuit is placed
in bright light (added 5/02) |
|
Message Wand - The message wand is a good PIC introduction as it is a simple
project yet illustrates many aspects of the PIC usage. Used at night, the wand is
swung around above the head, and to onlookers spells out a short message in the air
using flashing LEDs. It could also be used with a handle and spun round like a
traditional soccer rattle (can you still get those?) though great care must be taken
if you do this....(circuit added 04/04/04) |
|
MicroController drives logarithmic/linear dot/bar 20 LED display - 01/18/07 EDN-Design
Ideas: Do-it-yourself analog-to-LM3914 display driver offers user programmability.
(schematic.....(design idea added 6/07) |
|
Model Lighthouse - This project was designed for a model lighthouse to flash a
lamp or LED in a simple sequence: two flashes of 2s with a short gap of 1s, followed
by a longer gap of 5s before repeating the sequence. A 4017 counter is used to produce
the flash sequence and this project includes information on how to adapt it to give a
different flash sequence.....Designed by John Hewes (circuit added 06/07/08) |
|
Monolithic Converter Drives High Power LEDs - DN376 Design Notes (Linear
Technology) (app note added 1/06) |
|
Multidisplay LED Controller - Linear Technology LTC3205 (app note added 02/05) |
|
Multiple LED flasher - This circuit will flash a string of LED's, typically 16,
with direct connection to the mains and with a period adjustable between 1 and 4
seconds depending on the setting of the 22K/1W pot. Operation at 110V should also be
possible but has not been tested. (added 9/07) |
|
Multiplexing LED Drive & 4x4 Keypad Sampling - Microchip Application Note
Published 26-Aug-97 (app note added 2/06) |
|
One microController pin drives two LEDs with low quiescent current - 02/07/08 EDN-Design
Ideas: Two simple circuits allow a battery-powered microcontroller to drive two
LEDs.....(design idea added 02/08) |
|
Optical feedback extends white LEDs' operating life - 01/18/07 EDN-Design Ideas:
PWM-controller loop stabilizes light output.....(design idea added 05/06/07) |
|
Optical Toggle Switch using a Single Chip - (electronic circuit added 10/05) |
