Hi all, I'm new here and I hope someone could help me out with my problem combining to simple 555 circuits. Sorry but I have very little knowledge on electronics and am just learning (already burned a couple of components trying to solve the problem ).
Anyway, I managed to get hold of a simple 555 alarm and a 2-tone siren (attached gif) from the web. Overall, the alarm (circuit A) should trigger the siren (circuit B). I was able to complete the circuit using a relay but have some questions.
1. Is there an alternative to using the relay like making use of a transistor?
2. Circuit A is triggered by a normally open switch (SW4), is it possible to modify the circuit and use normally closed switch as trigger?
Appreciate any help you can give me and thanks in advance.
Anyway, I managed to get hold of a simple 555 alarm and a 2-tone siren (attached gif) from the web. Overall, the alarm (circuit A) should trigger the siren (circuit B). I was able to complete the circuit using a relay but have some questions.
1. Is there an alternative to using the relay like making use of a transistor?
2. Circuit A is triggered by a normally open switch (SW4), is it possible to modify the circuit and use normally closed switch as trigger?
Appreciate any help you can give me and thanks in advance.
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