T&L Publications

I have a habit of reverse engineering things, ya know, I guess I got caught up in it last night.

Yes, I figure I'll put an on/off switch to Vcc of the 22v10 to turn the whole mechanism off.

-paul

I found this awsome guide to writing Jedec files. It really does explain a lot!

www.dcs.shef.ac.uk/intranet/teaching/pr ... f/u8as.pdf

Gorgon: I've been looking for programming GAL (Generic Array Logic) chips. I was having no luck and then I ran into this site. http://www.geocities.com/mwinterhoff/intro.htm Which told me you need to create a JEDEC file, which seems to contain a kind of assembler langauge. I was then able to find so...

Well I messed that up Here it is again hopefully formated better This first one we already worked on.. pin........Binary .......Bit7......0 0.........10000011 1.........00000111 2.........00001110 3.........00011100 4.........00111000 5.........01110000 6.........11100000 7.........11000001 This is ...

Thanks Gorgon I really appreciate the help. I tried my best to keep everything in the correct order, if there is any question please understand the the eprom is wired on my breadboard and outputs exactly as stated below, I used the same format for chip two. Just a question, now I know you've been do...

The programmer at work wont program a 22v10, I need the next model up, the Apro +. I did however find someone that does business with our company that does have a programmer that works with this chip. Go figure, huh!! Sorry about the counter thing, before you suggested using an eprom, I was thinking...

Hey: I found a GAL 22v10 at digikey, part number ATF22v10CQZ-20PC-ND. Do you think an A-Pro programmer will be able to program it? Acording to the datasheet, any PLD programmer will work. Just what driver do I use? This is an ATMEL chip and I know I have SGS thompson drivers at work, wonder if they ...

Hey there: I'm sort of using an old circuit to drive the LED's and there are ten of them to indicate the wind speed. What I need the logic for is to select the appropriate wind speed to cut another circuit. I figure, I could use a 4066 chip with the CTL connected to the eprom, then when an LED is li...

Hey there: Technical support is my job. I sort of ask other to do the same. One tinme when I was new in my field someone found a solution to a big problem, he would not share that solution, ever since then I have kind of demanded that all solutions no matter how stupid be shared. About the pins. Wel...

Hi there Guys: Thanks for the feedback. I guess I'm looking for something small. I'll be using two regular rotating switches to turn the outputs on. One switch will be connected to 10 inputs, well thats not accurate. Its a ten pin rotary switch. This circuit we did not work on. The other switch is a...

Gorgon: Maybe I asked for the wrong thing. By your response it looks as if the PICs require support chips and I'm trying to get away from adding more chips. My board is like a 4 X 6 inch. Currently my breadboard has 3260 connection points, and they are almost full. I guess what I'm asking for is a 1...

Gorgon:

Is there a PIC that would do the same thing we did here with the eprom? The reason why I ask is that I will need two more chips on the board, and space is tight, it was tight enough with this eprom, now with two more, I'm not sure how they are going to fit on the board.

-thanks
-paul

Hey All:

Does anyone know of an eprom with 10 bit output?

Thanks!
-paul

Maybe I should use an SSR instead. Reason being is that I currently divide the current between an LED and a resistor to the gate on an PNP transistor. The 4N25 seems to operate an NPN transistor. I'm using the PNP transistor to switch a circuit on. When using the 4N25, I'm not sure what to connect t...

Does the 4N25-28 need to be in series? Can it also work in parallel with the current LED?