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Podium with 2 buttons and 2 lights
Push button wiring diagram
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show push button wiring Podium with 2 buttons and 2 lights Push button wiring diagram |
 Larger imagePushing the button turns on Load, and activates a relay. When the relay 1 is ON, then relay 2 cannot turn on, so load cannot activate. Only one load can activate, and when it is activated, the other load cannot turn on. The trick is to route the Hot wire from each push button through the NO terminals on the other relay. With this wiring, each contestant must push and hold their button.... if they release their button, or if a cheap push button loses contact momentarily, then the other light will come on. The solution is a) Use higher quality momentary push button. Do not use doorbell button. Doorbell button is unreliable but could be used for test wiring. Buy extra push buttons to identify the ones that are durable and not defective. b) To solve problem of early release, add a 20 second delay timer to circuit so contestant hits the button and the light stays on for duration of delay, even if the contestant releases button. c) A latching push button would solve the release problem, but would need to be pulled back up after each push.  Two
contestants require 2 - LY2 relays or similarThree contestants require 3 - LY3 relays: Each LY3 relay has 3 sets of NO contacts. Four contestants require 4 - LY4 relays, or 4 - LY3 relays and 4 - LY2 relays. Each button would activate 2 relays, and each relay would cancel the other buttons that were not pushed first. The wiring would work same as illustrated. Buy: Momentary push button Relays LY2 8-pin relays LY3 11-pin relays for 3 contestants LY4 14 pin relays for 4 contestants |
 MultimeterTest for breaks in wire/ Test for voltageMost appliance require 80% rated voltage to function correctly Buy Multimeters at Amazon Electric testers at Amazon Resource: How to test and replace element How to test thermocouple Element tests for 120 volts How to test wire |
Safety
when testing wires: Never touch wet or previously flooded appliance. Never stand on wet surface when working on electric. Never stand on bare soil, put down dry boards. Tape tester leads to wood sticks to keep hands away from power. Use non-contact voltage tester before touching wires. Never touch or lean into any made of metal. Remove metal objects from pockets. Do not use oxygen or fuel accelerants in same room as electrical repairs Resource: Basic house wiring |
 Non-contact voltage testerTest for power without touching connectorsNEVER assume power is OFF Buy: Non-contact voltage tester Amazon Electric testers at Amazon Resource: How to test electric power is off |
Twist-on wire connector assortmentsDo not reuse old connectorsBuy: Connector assortment at Amazon Connector assortment at Amazon Resource How to select and install twist-on wire connectors |
Weatherproof wire connectorConnector cavity is full of siliconeBuilt-in cover keeps silicone in place Protect from water, dust etc Buy from my affiliate links Weatherproof size 14 to 6 Amazon Weatherproof size 22 to 8 Amazon Resource How to select and install connectors |
Wrench to apply wire connectors Tighten connector Buy: Wire connector blaster Twist connector wrenches at Amazon Resources: How to twist wire How to select and install twist-on wire connectors |
 Buy: Blue for 16-14 wire Yellow for 12-10 wire Resource: How to install terminals |
 TerminalsBuy:Terminal kit Blue for 16-14 wire Yellow for 12-10 wire |
Push-on wire connectors in place of twist-on connectorsBuy:Push on wire connectors Amazon Red 3P connector for 10-14 gauge wire Lever connectors for stranded wire at Amazon |
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  When removing insulation from wire, do NOT score or put cuts on surface of copper wire. Doing so increases resistances on wire and creates weak point. Buy tools: Wire strippers at Amazon Linesman pliers Utility knife at Amazon End cutting nippers at Amazon |
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