Infrared HPWM setup

[astanapane]

Hi Richard,

you are right, i have decreased the speed and manage to play a lit bit with the delay in useconds.

I worked somehow but not always reliable.

I think i will try the RC5 method.

[richard]

I worked somehow but not always reliable.

the series resistor for the led is wat too big, it will make range / reliability pretty low. it could go as low as 39 ohms safely [probably lower even] in a non continuously on configuration otherwise 100 ohm would be better

[astanapane]

I will try to change that as well before i go for the RC5.

The following 15 days i will be in a business trip in Abu Dhabi so i will get back as soon as i have time to check this out.

Many thanks.

[tumbleweed]

You can get rid of the transistor and associated resistors and just connect the OUT directly to RB7.

If you need to, you can invert the RX sign with the DTRXP bit in the baudcon register.

[mpgmike]

the series resistor for the led is wat too big, it will make range / reliability pretty low. it could go as low as 39 ohms safely [probably lower even] in a non continuously on configuration otherwise 100 ohm would be better

For most LEDs or SSRs, I found 470 ohms offers a good compromise between response time and effectiveness.