Hello All,
Am in serious trouble and i need your assistance. My project is not working and after trouble shooting I found out that d problem is from the oscillator. The crystal (4MHz) was connected to pin 13 & 14 of the PIC16F877A with a capacitor of 30PF. Also on my pin 1 I have a 10K resistor to power. At pin 11,12, 31 & 32 were connected to Vdd & Vss with a 100nF connected across each pin (i.e 11&12, 31&32) respectively.
The output voltage from the oscillator is less 0.7V instead of 2.2 0r 2.5V respectively.
The project is Automatic Plant Irrigation. At the moment only the red LED that is up, and the other Leds are down even if my probe (copper wires) are dip into wet soil.
Please help as soon as possible as death line is jst a few days frm nw
Thanks
Am in serious trouble and i need your assistance. My project is not working and after trouble shooting I found out that d problem is from the oscillator. The crystal (4MHz) was connected to pin 13 & 14 of the PIC16F877A with a capacitor of 30PF. Also on my pin 1 I have a 10K resistor to power. At pin 11,12, 31 & 32 were connected to Vdd & Vss with a 100nF connected across each pin (i.e 11&12, 31&32) respectively.
The output voltage from the oscillator is less 0.7V instead of 2.2 0r 2.5V respectively.
The project is Automatic Plant Irrigation. At the moment only the red LED that is up, and the other Leds are down even if my probe (copper wires) are dip into wet soil.
Please help as soon as possible as death line is jst a few days frm nw
Thanks