Retrogamer09
Offline

Hello,

I want to get information on how to add a toggle switch to hex 74hc04 IC in order to switch from Normal display to Inverted display.

Basically, I want to know If I could use a SPST switch to do that, and if not, I would like to understand why.

Also, if you guys could help me giving me an idea how the connection goes, If I already have the IC installed in the motherboard, what do I do next to add the switch?, what cables to I cut and solder to the switch?

Thank you very much!

nitro2k01
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Sweeeeeeden

With a 74hc04, no. You need a DPDT switch for that. You could use a 74hc86 chip with a SPST chip. Described here:

http://blog.gg8.se/wordpress/2009/11/23 … d-palette/

Retrogamer09
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nitro2k01 wrote:

With a 74hc04, no. You need a DPDT switch for that. You could use a 74hc86 chip with a SPST chip. Described here:

http://blog.gg8.se/wordpress/2009/11/23 … d-palette/


Thanks, and how the connection goes using a 74hc04 with a DPDT, What cable from the IC connects to the DPDT switch in which order?

Telerophon
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Austin, Texas

Justin Thursday makes a prefab kit for this, FYI.