Hi All,
I am working on a circuit that needs to send a logic 1 or 0 to a computer ROM chip by using a photocell attached to an And gate circuit. I have it working with the exception of one major bug.
I have the 2 pdfs on my website, one is the description and the other is the schematic. The description pdf explains the circuit workings and also what the bug is, any help would definately be appreciated. Obviously i would like the solution to be as simple as possible but beggars can't be choosers.
The circuit works fine when i use a simple pushbutton switch instead of the optical input but i would like to use the optical feature. Also, should i use a diode on the comparator output to protect it when its output is 0?
http://www.kipper2k.com/tempry/multiboot_schematic.pdf
http://www.kipper2k.com/tempry/description.pdf
Thanks
I am working on a circuit that needs to send a logic 1 or 0 to a computer ROM chip by using a photocell attached to an And gate circuit. I have it working with the exception of one major bug.
I have the 2 pdfs on my website, one is the description and the other is the schematic. The description pdf explains the circuit workings and also what the bug is, any help would definately be appreciated. Obviously i would like the solution to be as simple as possible but beggars can't be choosers.
The circuit works fine when i use a simple pushbutton switch instead of the optical input but i would like to use the optical feature. Also, should i use a diode on the comparator output to protect it when its output is 0?
http://www.kipper2k.com/tempry/multiboot_schematic.pdf
http://www.kipper2k.com/tempry/description.pdf
Thanks