[sdiy] SSM2164 last time buys

[Oscar Salas]

Hi Jay,

> All,
> 
> One thing to do is the wattage calc for the current
> limiting resistor. At 20
> ma I thinking that a 1/2 watt might not be bad.
> 
> Jay S.

Yes right!  a 510Ω resistor if negative supply falls, accordingly to my measurements, will drive 24.9 mA that at 15V will be 0.37W so 1/2W resistor will work OK. For a 330Ω resistor 36,7mA so 0.55W 0.6W resistor will be OK. And maybe also a 1/2W because only will drive this amount when negative rail falls. I didn't noticed the resistor going hot. But yes better 0.6.