Wayne Parham Messages: 18782 Registered: January 2001
Illuminati (33rd Degree)
Bill Epstein wrote on Sun, 10 June 2012 13:58
Digikey 24 pin EDS6243-ND and 20 pin EDS6203-ND
Also the NPN which I hope is the right spec 497-2598-ND 40V 600mA TO-18
The relay Reed DPST 500mA 12V 306-1035-ND
I forgot to get an DC input jack but I can get that from rat Shack with the perf boards
What else do I need?
The relay, transistor and sockets are all correct.
Now you just need a power supply. I like using a center tapped 12V transformer, rectifier, filter cap, a 7809 and 7905 to make +/-5V then onto a 317 and 337 to make +/-2.5v. This is seriously overkill having two regulators. But each of the regulators is like sixty cents a piece, so having all that noise filtering is cheap.
Could do it with a rectifier, filter cap and a pair of Zeners. Or could go with the modules like Bruce did. But no matter how you slice it, you gotta have +/-2.5V.
Here's my BOM minus the PS stuff because I took a different approach. I am not sure if the caps in the IR rcvr circuit (1.0/.1uF) should be polarized electrolytic. Wayne?
I made my order at Mouser. Bill, I could not find the parts using the numbers you supplied for the gold sockets at Digikey. Could you verify those?
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