Does anyone know the reasoning behind the marked connection in this ripple-carry multiplier? i.imgur.com/DWhZiBe.png

@Marla !!

@Asmyldof . . I have been out washing the electron dust off of my car.

@Marla I spent the afternoon wax-polishing my stock of transistors

I still have the first two transistors I ever bought. 2N107 and 2N170

Have you regularly wax-polished them?

No. They came in dull black color. Top hat case

Are you sure they still work, without the lasting protection of a high end transistor wax?

Surprisingly, transistors came with 2 inch leads back then. Point to point wiring.

Yeah, I'm pretty sure they need specialty wax. Currently don't stock it, but we can put it on order if you want

Does anybody know of an 8-bit(single byte) ttl register chip where each bit of the one byte word(from 'left' to 'right' or vice versa) can be loaded one at a time(sequentially)?

@zack1544 . . Do you mean an 8 bit shift register?

@Marla Thank you. A serial-in parallel-out shift register seems to fit the job perfectly.

a few months ago I found a company that made TVS-like devices

but rather than zener-like and thus clamp and dissipate, they essencially went high-impedance - ie series devices not parallel shunt devices

problem... I didn't bookmark or note it :( has anyone heard of or come across something like this

bourns.com/products/circuit-protection/…

typical :) google for like 20min... decide to post for info and bam :) next query term hits it

Does anyone have any tips/suggestions for connecting the outputs of multiple ttl logic chips(common output bus). Is a tri-state buffer 'in between' each logic chip's output and the common data bus the easiest/safest way to go?