Tuesday, May 14, 2013

Pairs Simple Schematic Diagram Wiring

Wiring Diagrams on Installing A Tachometer In Your Ford Ranger
Installing A Tachometer In Your Ford Ranger.


Wiring Diagrams on Light With Outlet 2 Way Switch Wiring Diagram
Light With Outlet 2 Way Switch Wiring Diagram.


Wiring Diagrams on In Pairs Above Is A Simple Schematic Diagram Of How The Wiring For
In Pairs Above Is A Simple Schematic Diagram Of How The Wiring For.


Wiring Diagrams on Power At Light 4 Way Switch Wiring Diagram
Power At Light 4 Way Switch Wiring Diagram.


Wiring Diagrams on Basic 2 Way Switch Wiring Diagram
Basic 2 Way Switch Wiring Diagram.


Wiring Diagrams on Post It But I Ll Try To Diagram It Here
Post It But I Ll Try To Diagram It Here.


Wiring Diagrams on Dodge Dakota Radio Wiring Diagram 1998 Dodge Ram 1500 Wiring Diagram
Dodge Dakota Radio Wiring Diagram 1998 Dodge Ram 1500 Wiring Diagram.


Wiring Diagrams on Wiring Diagram For Manual Service   Motorcycle Diagrams Collection
Wiring Diagram For Manual Service Motorcycle Diagrams Collection.


Wiring Diagrams on Diagram Electrical Circuit Diagram Related Posts Wiring And Connectors
Diagram Electrical Circuit Diagram Related Posts Wiring And Connectors.


Wiring Diagrams on Here Is A Typical Schematic Of Bentley Parrot 3200 Ls Wiring Diagram
Here Is A Typical Schematic Of Bentley Parrot 3200 Ls Wiring Diagram.
[read here...]

Sunday, May 5, 2013

Three Flashing LED Doorbells For The Hearing Impaired

When the push switch is operated - the buzzer will sound and the LEDs will begin to flash. For the hearing members of the household - the buzzer acts as a regular doorbell. It also re-assures the visitor that the doorbell is working.

When the push switch is released the buzzer will stop - but the LEDs will continue to flash. The length of time they will go on flashing is set by the values of R2 & C1. With the values shown in the diagram - the LEDs will flash for a further 30 seconds or so. If you make R2 a variable resistor, you can adjust the time period. If you want longer than 30 seconds - increase the value of C1 or R2.

Flashing-LED-Doorbells-Circuit-Diagram

The last circuit will flash up to two groups of 3 LEDs in tandem. This circuit will flash the two groups alternately. The alternate flashing creates the illusion of movement - and makes the display more eye-catching. Note that - although Ive drawn the two groups of LEDs side by side - the individual LEDs can be mounted in any pattern you like.

LED-Doorbells-Circuit-Diagram
The main difference between this circuit and the last one - is the addition of the two transistor switches. The switches will each flash up to 15 groups of 3 LEDs. And - because they are getting power directly from the battery - the LEDs will glow at their full brilliance.
Three-Flashing LED-Doorbells-Circuit-Diagram
The Support Material for these circuits includes detailed circuit descriptions - and all the information you need to adapt them to a different supply voltage.
[read here...]