Electronics Projects, Speaker DC Protection Circuit Delayed and LED alarm article
"audio control circuits, " tagged with
The circuit can be delayed and led excitation speaker dc protection circuit.A current of approx. 70mA. The appropriate value for the high voltages are selectable Rs resistance.
For example: Amplifier 2x24Vac with the feed from the same place, we can get this circuit.Aim will be about how to find the value and power of direncimizin 34Vdc.
Rs = (34-17)/0.07 WRs = (34-17) x 0.07
Rs = 243 ohm WRs = 1.2 W
547 = BC547, 139 = BD139
250 k potentiometer with approximately 1-9 sec delay setting. Operation of the circuit in addition to certain clear min. 0.8 V is active.
Speaker protection circuit PCB files: speaker-dc-protection-circuit-delayed-and-led-alarm.RAR