hotpoint95622
Well-known member
Lee's project
Display module and program selection buttons.
Display module and program selection buttons.
Lee's project
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Lee
Mahalo for sharing! I have been trying to figure this out for the last 5 years! How did you get the 5 v Dc output from the PIC to trigger the 12 v DC relays?
Jon
Mahalo for sharing! I have been trying to figure this out for the last 5 years! How did you get the 5 v Dc output from the PIC to trigger the 12 v DC relays?
Jon
hotpoint95622
Well-known member
Hi Jon
I have used BC337-16 low power NPN transistors which are protected by 1N4148 switching diodes have also put an LED to show when the output is active.
I have used BC337-16 low power NPN transistors which are protected by 1N4148 switching diodes have also put an LED to show when the output is active.
OH ISNT THAT
SMART!
And the diodes absorb all the shock of switching the inductance loads!!
Is that a high wattage 1Kohm resistor in series with the PIC output?
Good you Lee, now I see where to go!
Thanks
jon
SMART!
And the diodes absorb all the shock of switching the inductance loads!!
Is that a high wattage 1Kohm resistor in series with the PIC output?
Good you Lee, now I see where to go!
Thanks
jon
Jon, for the two relay boards that I had constructed for the Super Unimatic, I used a similar setup. I didn't realize that the part marked BC547 was an actual transistor! You know I prefer vacuum tubes :-D
hotpoint95622
Well-known member
Thanks
Resistor is ¼ watt 1 K metal film. Stops the relay making a humming sound.
Resistor is ¼ watt 1 K metal film. Stops the relay making a humming sound.
