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  1. K

    "Tenna" PS-20 power supply

    Does anyone have a schematic of the "Tenna" Phase III PS-20 power supply? If anyone has a schematic for a Pyramid PS-20 supply, it may be the same. This unit is a 120 VAC to 13.8 VDC @ 17A continous (20A surge) power supply with no crowbar or other "protection" circuit. Just a "plain Jane"...
  2. K

    Need help with LED display circuit

    Hi, everyone. I've been keeping an eye on the main board for a few years now, but just signed up for the forum. I'm now wishing I'd done this earlier! Anyway, here's my problem: I'm trying to design and build a circuit to use a 5-bit binary input to drive a dual seven-segment LED display. I'm...
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