Irving wrote:One major caveat to the diagram on how to connect the BT adapter negative ground (black) wire.
If you are using an external buck (down) converter DO NOT power it directly off the main charger supply unless it is an isolated DC-DC converter. If it is non-isolated, connect the + input to the PL8 + (red) input only and be very careful that the - (black) connection of the buck converter does not come into contact with the - input to the PL8. Better, for safety, use a stand-alone isolated 5v USB charger, a stand-alone 5v USB powerpack, or a 3 x AA cell switched battery holder and do not connect the negative side to the negative power input.
Now, I know there are those that say they've wired it directly and it works, and yes it will, most of the time. But it is a problem waiting to happen...
The negative input to the PL8 goes to a pair of parallel 40A fuses, a MOSFET isolation switch and a high frequency noise filter BEFORE it becomes the internal 0v rail and ground connection on the 3-pin remote control connector. So connecting the BT ground to the negative power input ground bypasses all of that and under fault/overload conditions and/or when doing high-power discharge into a dummy load, that connection can potentially become the main current flow in or out of the PL8 which is almost guaranteed to do some serious damage to the BT adapter, the PL8, the wiring and/or the local environment...
Burgerman wrote:Doesent it kind of defeat the object of the excersize to have 2 extra boxes and needing a USB connector to power it all?
If you are just a tiny bit braver, fit it inside, theres nothing to see or plug in?
snaker wrote:It is regrettable that there are too few members here have it. I only count 3 BM, Irving and mine. Is there anyone else?
swalker wrote:I knew before I started that range would be a problem. The wheelchair lives two rooms away and there are walls the signal has to make it through.
In practice, the range from the wheelchair to the computer is just too great. So, I don't use the BT connection, though I know it would be handy to have.
snaker wrote:How far from you or your computer to your chair in case it lives 2 rooms away?
...Buy a USB to serial UART interface that supplies 3.3v.1. To power JDY-40 by a 5V source,
expresso wrote:one is 6 and other is 5 - are any of these any good ?
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