What IC?I think the IC will consume more power.
What IC?I think the IC will consume more power.
74LS04 Hex Inverting NOT GateWhat IC?
I don't see that in your posted schematic.tried simulating the circuit. I cascaded the transistor based relay driver to an astable multivibrator circuit.
You could accomplish the same thing - inverting the 555 output - with a single transistor.74LS04 Hex Inverting NOT Gate
What do you mean by inverting? Do you have a schematics?You could accomplish the same thing - inverting the 555 output - with a single transistor.
Many types with piezo sounder have a peaking inductor - they're usually capable of triggering a sensitive gate SCR.I want to rig a 12V car horn to my small alarm clock. My plan is to connect a relay on the buzzer part of the clock so whenever the buzzer goes off, the relay coil powers up and the normally open contact of the relay turns on the car hon. However, the problem is that the voltage of the buzzer is usually small (about 1-1.5V) only. Kindly help me. Thanks
You have plenty of company.I feel like such a fool!
YES, that circuit should work.Voltage at buzzer goes to base pin of NPN transistor. Emitter pin to ground. Collector connects to ground side of relay, so that the relay's path to ground is completed when the transistor conducts. The transistor must be rated to a current well in excess of the relay coil current.
by Aaron Carman
by Jake Hertz
by Aaron Carman
by Jake Hertz