L
lerameur
- Jan 1, 1970
- 0
Hello,
I have been trying to build a programmer for the PIC16F84A microchip.
After a couple of design not working. Then I found this web site
(http://sciencezero.4hv.org/electronics/com84.htm) stating that a 13v
produced by the serial port is needed. From my voltMeter, I can only
record about 0.5v.
They say that newer computer do not have enough voltage at the serial
port.
Is this true ? If so How can I fix the problem.
I tested 4 circuits over and over again, they cant be all wrong..
ken
I have been trying to build a programmer for the PIC16F84A microchip.
After a couple of design not working. Then I found this web site
(http://sciencezero.4hv.org/electronics/com84.htm) stating that a 13v
produced by the serial port is needed. From my voltMeter, I can only
record about 0.5v.
They say that newer computer do not have enough voltage at the serial
port.
Is this true ? If so How can I fix the problem.
I tested 4 circuits over and over again, they cant be all wrong..
ken