I'm currently building a circuit and writing a program in PicBasic for a baseball machine. I built one board that is working perfect but every attempt I've made to remake that board has ended up in headaches and trouble. I've been searching this forum for answer and found great results but nothing that pertained to my situation.
This is my circuit:
The only difference between the original board I made that is 100% working and the ones I'm having trouble with would be the transistors that i'm using. The original transistors I used were the 2n2222 NPN trans. The newer boards I'm using the 2n3904 and the 2n4401 but from what I've read online it seems that I can just replace with those transistors without any issue.
I've noticed that when I test the board I can get the automation to do right.
(It cycles and feeds Q2 and Q3 5v in the sequence I need them to) As soon as I feed Q1 with 5volts from my PIC the entire board stops working. I'm assuming this is a transistor issue or an issue with biasing but have yet to find the exact problem..
I'd appreciate the help and if you have any questions because I'm sure my explanation is pretty confusing. Feel free to ask
thanks in advance
EDIT: Also some issues I'm having that I forgot to describe is when the transistor switches sometimes it hold 5V on the base of the transistor. I've also had one board where one of the pins on the PIC was showing 10-12 volts (note that this is a pin that is connected to one of the transistors).This happens regardless if I have the microchip in the socket or not. So I know it isn't an issue with my programming or the chip itself
This is my circuit:
The only difference between the original board I made that is 100% working and the ones I'm having trouble with would be the transistors that i'm using. The original transistors I used were the 2n2222 NPN trans. The newer boards I'm using the 2n3904 and the 2n4401 but from what I've read online it seems that I can just replace with those transistors without any issue.
I've noticed that when I test the board I can get the automation to do right.
(It cycles and feeds Q2 and Q3 5v in the sequence I need them to) As soon as I feed Q1 with 5volts from my PIC the entire board stops working. I'm assuming this is a transistor issue or an issue with biasing but have yet to find the exact problem..
I'd appreciate the help and if you have any questions because I'm sure my explanation is pretty confusing. Feel free to ask
thanks in advance
EDIT: Also some issues I'm having that I forgot to describe is when the transistor switches sometimes it hold 5V on the base of the transistor. I've also had one board where one of the pins on the PIC was showing 10-12 volts (note that this is a pin that is connected to one of the transistors).This happens regardless if I have the microchip in the socket or not. So I know it isn't an issue with my programming or the chip itself
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