WP34s flash technical erase procedure

[walter b]

(01-28-2015 06:02 AM)MarkHaysHarris777 Wrote:  The appendix is great for getting the job done (which is most important) but its not too great for understanding how some of the electronics work; which is important for designing an interfacing circuit.

I'm thinking of powering the calc from the three parallel TTL inverters 'locked' on. Then, the erase strobe can be the output of a flip flop that holds itself on; till reset of course. The FM doesn't speak to powering the unit with TTL, nor does it discuss TTL driving the erase strobe or reset... so just wondering. if my idea works I can also eliminate the LM117 volate regulator, and I can use some of the inverters (there are six) to drive the LEDs instead of discreet RTL components.

So far, the manual is not written for an EE fiddling at the HW. Though not completely true due to App. H dealing with tuning your WP 34S, but you can do that without knowing about the signals at various points. Anybody who's trying to do more shall do his/her own measurements or ask the EEs on this forum who might be able to support him/her.

d:-)