View source for Step 4 - Adding the Relay

<u><h3>Adding The Relay</h3></u>
[[Image:Camera Flash 3.JPG|left|frame]]

The standard pins on automotive relays are labelled on the relay body as;
# Pin 85 and 86 are the coil leads.
# pin 87a is the NC (normally closed) contact.
# pin 87 is the NO (normally open) contact.
# pin 30 is the Common contact for 87 and 87a.

When the coil is '''off''' 87a is connected internally to 30. When the coil is '''on''' 87 is connected to 30 (and 87a is disconnected). 

'''Note that the pin labels in the image below do not match those in the schematic above'''. [[Image:Relaybot.jpg|left|frame|Typical automotive relay]] [[Image:Relay.gif|frame|right|Typical automotive relay]]

{{Navbox
| name  = Step 1 - Removing the Flash Bulb
| title = Installing a Camera Flash ignition
| body  =
[[Step 1 - Removing the Flash Bulb|Step 1]] ·
[[Step 2 - Drilling the Holes for the Ignition Coil Wires|Step 2]] ·
[[Step 3 - Before Adding the Relay |Step 3]] ·
[[Step 4 - Adding the Relay |Step 4]] ·
[[Step 5 - Adding the Ignition Coil and Spark Strip/Spark Gap|Step 5]] ·
[[Step 6 - Providing Power to the Relay|Step 6]] ·
[[Step 7 - Removing the Battery Contacts|Step 7]] ·
[[Step 8 - Adding a Battery Holder and Kill Switch|Step 8]] ·
[[Step 9 - Replacing the Charging Button|Step 9]] ·
}}

{{stub}}
[[category:Ignition sources:Camera Flash]]