HWPeeler (HPeeler)

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More modified Snap Modules   Discussions

Started 5/16/18 by HWPeeler (HPeeler); 72 views.
HWPeeler (HPeeler)

From: HWPeeler (HPeeler)


The 7-segment display as designed is only good for the exercises included. Only one character is hard wired to be displayed at a time. Opening it up you find one 100 Ohm resistor on the positive power lead only. This doesn't bwork if you intend to demonstrate a 7 segment decoder and a counter. So we modify it.

And there is no general purpose operational amplifier. So we create one. You can buy empty cases from them. All I needed for a basic op amp is seven snap buttons so I got one of the bred cases as used for the CMOS logic gates. MCP6021 was used. It is Rail-to-rail In and out, designed to work on a single 5 Volt rail. I mounted it on a small PC board with a socket so it could be changed easily. Most op amps will work but many lack the rail to rail capability of the MCP6021.

In reply toRe: msg 1
HWPeeler (HPeeler)

From: HWPeeler (HPeeler)


The modified display put to use.