TTL Signal System Conversion Module RS422 Full Duplex Bidirectional Switch RS 422 To TTL Module SCM MAX490

top product , I am impressed with the product +i recommend use 8 Ohm speakers or two 4 Ohm speakers per channel in series (not tested) +I tested 2 speakers of 20w plus 2 speakers of 30w plus 2 tweeters all in parallel and all 4 Ohm , still normal, but not enough amperes (I tested with a 19V and 3A supply) +I come back to edit the review after testing with 24V 6A

Works well, should be connected to the circuit load first. If you connect this trigger to the power source first, without a circuit load, if may be disconnected and have the 5V output. So connect to the circuit load first, and only then - to the power source.

Not tried them yet but I cannot see ant reason why they will not work. They simply turn the charger on and off at the upper and lower battery voltages you have chosen. In doing so they turn any charger into a "smart charger".

Very good board. Does its job well. For a little higher price would be much more user-friendly if an led monitor could be included on it to show "charging" and "charged" states by a bi-colour led.

Arrived a week ago, only just managed to leave review. New and unused, packaged well. Not tried as yet but is of good quality and see no reason why it shouldn't work ok. Thank you seller.

I did a quick check and it appears to work fine. Restricted each cell voltage during charging, exactly as it should do. Good construction. 100% happy with this product. Harry L

Its looks OK, I will try it later ..........I connected it to a computer fan and it did not work and became hot , maybe it is not intended to be used like this

I dont know if the cells(brand new cells) or BMS it burned the wires but this BMS works for one hour, now i can not charge my battery anymore