I want soming sipmple that i can get together in a short time out of parts that i have laying around
besoe all i have to do is add one ome transistor and a cuple of resistors to make it work whith nigels programer
you simply conet D0 to clock,D2 and an input to data and have an trasistor switch on/off Vdd and Vpp whith a litle setings in nigels software and you have an programer.
Q2 is an open collector inverter, used for reading the data from the PIC back into the Ack pin on the parallel port. It requires 5V on the top of R5, which presumably the original software provides?. You would probably require an external 5V source to use it with WinPicProg.
I am going to have an 5V source.(i need to have it for Vdd anyvay)
I there a way to moodyfy it so that it works for low voltage programing (to get rid of the 13V)(16F88 and 18F252 have low voltage programing)
I am going to have an 5V source.(i need to have it for Vdd anyvay)
I there a way to moodyfy it so that it works for low voltage programing (to get rid of the 13V)(16F88 and 18F252 have low voltage programing)
I've never looked into it, I've always considered it a waste of time - it wastes too many I/O pins.
You appear to be wanting to build the crudest, simplest, programmer you can (where you only ever build ONE of them). Yet you want to complicate your target boards by adding ICSP and LV programming capabilities - where this requires building on EVERY target board you make.
I dont think i can find an small box for the programer.
I gues i will use an Tic Tac box (if its good enugh for candy its good enugh for me)It looks like perfect dimesons and its semitransparent(orange) so no holes for the status LEDs