I was planning to buy another circuits I might need and look what can be done with them - but I don't know what gate I will need. Currently I have just a quad NAND gate and hex inverter. No, I just thought it would be much easier if I had a chip that can be any logic circuit I need. Why do you need PLD technology ? Is your logic circuit that complex that it is not practical to do with discrete TTL or CMOS logic chips ? If not I am afraid the cheapest way would be to buy a bag of different ICs to have available the one I currently need. So does anyone know how to program ATF16v8 cheaply (around $10) - either DIY or some cheap programmer? If not is there some other chip that can be programmed to work as "low level ICs" (logic gates, latches.) easily and is cheap ($1-2) and is breadboard-friendly (I am able to solder 20 lead SOIC on adapter but I doubt I would be able to solder 144 leads FPGA). In fact I didn't find any programmer for such chips, just old discusions stating they are expensive ($100+ I would rather buy an oscilloscope) and DIY programmers are nearly impossible to make due to proprietary nature of programming protocols. The chip itself looks obsolete, even much newer (and more expensive) ATF750 is old. But when I got to programming section there is just a note "Programming/erasing is performed using standard PLD programmers." I hoped I could use Arduino to program the chip (something like ArduinoISP) but it looks like there is no such option. When surfing internet I have found PLDs - ATF16v8 costs about $1 on eBay and I was very excited reading the datasheet: it can be programmed to behave like any gate chip - or more connected. I wanted to learn about logic gates and how to use them (such as 74HC00 quad NAND gate) and I have found there is soooo many of different chips - HC, HCT, with or without Schmitt trigger, with open colector or totem pole outputs etc.
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