questions about relays, horns and volt issues?
i was trying to test out an alarm horn (a dual electronic siren49-480) and made 2 very stupid mistakes. first i connected all three wires to a spliced three prong wall plug. i then plugged the plug into a 120v wall socket. the voltage its supposed to be run on 12v. when i did this there was a quiet pop and and a bright flash. i then realized my mistake. i then tried to hook it up to a car battery and got 0 response from it. is there a good chance i fried the system.
also i have a bosch relay 0 332 207 101 and i am curious as to how this would work?
i am trying to set up an alarm system for a project in physics. it must be set up to go off when 2 wires separate. i have a transistor 2 resistors a led light and a buzzer.
if you can answer any or all of these questions i would appreciate it very very much.
thank you in advance
“is there a good chance i fried the system.[?]” yes, if you consider 100% a good chance.
“also i have a bosch relay 0 332 207 101 and i am curious as to how this would work” as far as I can find out that is a SPDT relay with a 12VDC coil, SPDT means Single Pole Double Throw, There is one (single) common connection that will make contact wit one of two (double throw) other poles depending on if the coil is energized or not.
“I am trying to set up an alarm system for a project in physics. it must be set up to go off when 2 wires separate. i have a transistor 2 resistors a led light and a buzzer.”
Do you have a specific values for the resistors and a specific type for the transistor or are you allowed to chose the values/type you want? To have the alarm go on when the wires separate is of course harder than to have it go on when the wires connect. I think I’d consider biasing the transistor on with the largest resistor that would do the job then then using the connected two wires to shunt the current away from the base switching the transistor off.
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