UPC1237 Speaker Protection Board Relay Delay Reliable Anti-impact Performance

Need to know before buying There are kit parts 2 and finished products 1 to choose from which can be used as audio enthusiasts DIY or technical school teachers and students for electronic training purposes The kit production requires basic welding test skills Please consider buying it If you are unsure please purchase a finished board The kit uses FR 4 spray tin high quality A level PCB which is convenient for welding and does not need to be debugged As long as the welding is correct it is basically successful at the first time It is suitable for 0CL or 0TL output power amplifier circuit BTL is only suitable for dual power BTL architecture single power BTL cannot be used please pay attention to use independent windings to supply power to the protection circuit so that you can close the power loop otherwise the speaker ground signal is mixed together easy to produce thousands of Disturbance and hum some friends are easy to produce hum in order to facilitate the use of the front level power supply and the protection circuit Please do not question or mislead others by random evaluations and the advantage of this is that it can improve the reliability of the protection function Function 1 Start up delay DC protection anti shock when power off 2 Fully sealed sterling silver contacts Japan Omron relay long life and reliable 3 7812 is used for voltage stabilization AC and DC automatically identify the power supply range to allow 12 24V and the current