On Sat, 23 Sep 2006 17:23:37 -0400, "xpyttl"
wrote:

Not too many folks fiddle with EPROMS anymore. Microcontrollers with

Error! There are plenty of people using eproms for systems and other
uses. I keep a programmer for such a reason.

onboard EEPROM are cheaper and easier to program, plus you get some logic
that allows you to reduce the circuit complexity thrown in for the ride. Of
course, these things grow ... with the logic, an encoder is cheaper and more
pleasant to use than the thumbwheel, but now you would like to add a display
.... and on and on. But still, I wouldn't be surprised if the micro,
encoder and display wasn't still cheaper than the EEPROM and BCD switch.

A micro like a PIC would likely be a lower cost solution and you can
then uses a cheaper switch and all. A programmer really more of a
cable for a PIC can be easily built for a PC parallel port.

Allison

..


"Atlanta-ham" wrote in message
roups.com...
Years ago in 73, and other mags, programming an eprom for the Icom 22S
was the rage.
I now have aquired a TransWorld transceiver that is programmed with
diodes. I wish to build a BCD thumbwheel input, with an Eprom for data
translation. It's no problem building a board, but it's a problem with
me programming the eprom. I don't need anything fancy, no memory, no
scanning, just using the thumbwheels to move frequency. I've never
programmed an eprom before.