[Amps] RF making it's way into a digital control box.

[donroden at hiwaay.net]

Your RF level at the relay is already close to 3ma. Add an interface to 
lower the resistance.

Don W4DNR

On 2025-01-07 10:56 am, Ron W4BIN wrote:

> On 1/7/25 11:17 AM, Lukasz wrote:
> 
>> The trick is to make the input to the problem relays to require
>> POWER to
>> activate them.  Feed a high current to those channels and drop the 
>> input
>> resistor divider down to the hundreds of Ωs.
>> 
>> Ron W4BIN
>> 
>> This will be difficult . I can pull at most 4mA at 3.3V on the control 
>> lines out of the uC board. That is not a lot of power.... I'm already 
>> at over half of that, so realistically ... I can't pull more than 3mA 
>> with a bit of safety factor.
> 
> How about using the input power to the 3.3 Volt regulator, 6, 10  or
> 12 Volts?
> 
>> If anyone has one ideas please share.
> 
> Ron W4BIN
> 
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