Greater Siren | Electronic Project Circuits

Posts Tagged ‘greater siren’

siren sound loudly circuit using CD4046

This is a simple siren sound. Very noisy. ICs, Digital ICs are easy to use number CD4046 Inverter circuit.
Operation of the circuit when the circuit is connected to power. Frequency generator circuit starts, the cycle will be the second frequency generator set to a first set of IC1 / 1, R2, C2 generator frequency 1Hz.Output can be modulated. With integrated suite 2, which is R3, R4, C3, ZD1 the modulation and frequency of Set 2 is the origin of IC1 / 2, R5, C4 are the output out of pin 12 of IC1 / 2 to Pin 1 of IC1 / 3.The output from the pin 2 is connected to IC1 / 4, IC1 / 5 and pin B of the Q1 output of IC1 / 4, IC1 / 5 is connected to pin B of Q2. we can observe that Q1 and Q2 will run switch. Well, if work makes Q1 Q4, Q5 run a current through the speakers and will work if Q2 Q3, Q6 running a current flowing through the speakers. The nature of the circuit of Q3-Q6 will result in high currents flowing through the speakers, the sound of the siren is very loud.

Be the first to comment - What do you think? Posted by admin - December 3, 2010 at 8:49 am

Categories: Alarm systems Tags: greater siren, super siren circuit

Emergency power siren 6 watt

This be Emergency power siren Circuit 6 watt sizes. It use Digital IC number IC 4011 perform produce the frequency pulse generator, be beep danger character. And have power mosfet wasp use a loudspeaker 8 ohm sizes and are large-sized loudspeaker. for have a voice as the last. For power supply Source use 12 Volt sizes that have can give current get tall about 1 Amp a little like and Power Mosfet should hold let off the heat with. The detail is other , friends , see in the circuit has yes.

Be the first to comment - What do you think? Posted by admin - December 17, 2008 at 9:13 am

Categories: Alarm systems Tags: Emergency siren, greater siren, siren alarm

British Police Car Siren by IC 555

This month I am making 3 different types of siren circuits based on the 555 timer. The first circuit simulates the siren of a British police car. It uses two 555 timers in the circuit. The 555 on the right is wired as an alarm tone generator and the second 555 timer on the left is a 1 Hz astable multivibrater. The output of the left timer is to frequency modulate the right timer. This causes the right timers frequency to alternate between 440Hz and 550Hz at a 1 Hz cyclic rate. The transistor is used to help strengthen the signal to the speaker.