UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Mark1960 · 19th Jun 2022, 6:03 pm

For the LED ghosting you might experiment with the enable input of the 74HCT237 to give a slight delay from the clock of the counter and disable before the next clock.

The 74LS189 is probably a better choice than 6116 as separate data input and output makes the interface a bit easier. 5101 could be considered but are no easier to get than the 74LS189. If you were ok to use more modern components then a 1kx8 dual port ram would remove the multiplexer.

19th Jun 2022, 6:03 pm	#6
Mark1960 Octode Join Date: Mar 2020 Location: Kitchener, Ontario, Canada Posts: 1,294	Re: HEXIO compatible to Elektor SC/MP system For the LED ghosting you might experiment with the enable input of the 74HCT237 to give a slight delay from the clock of the counter and disable before the next clock. The 74LS189 is probably a better choice than 6116 as separate data input and output makes the interface a bit easier. 5101 could be considered but are no easier to get than the 74LS189. If you were ok to use more modern components then a 1kx8 dual port ram would remove the multiplexer.