su1c1d4l
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4N25 can sink up to 50mA, which may be enough coil current for some of the relays. Check the relay datasheet.nandhu015 said:For connecting a relay you need a driver. A simple npn transistor can be used.
Schottky diodes work better for protection. The diode should be in parallel with the coil, reverse biased (cathode to +12V).su1c1d4l said:1n4001 as protective diode
Schottky diodes work better for protection.
Keep the big capacitor, read the 7805 regulator datasheet the output capacitance requirements are specified there.su1c1d4l said:if i put the 100nF near the VDD of the PIC, do i need to remove the 2200uF caps i have placed?
Try 1N5818, MBR1100. Look into current ratings (constant and peak) for each of these diodes. For a 1st try, probably any Schottky diode with current rating of 1A (or more) would do.su1c1d4l said:can you give me a specific diodes ideal for this set up ? im not familiar with schottky diodesSchottky diodes work better for protection.
Good point, K.karesz said:In your case(because the relay has separation between parts of electronics) is a opto coppler not needed...
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