This issue is caused output on pin NDRVA. About 9.39V to input U2 pin ch1 DM74LS393N Dual 4 bit binary counter This input would be no more than 5.5V Pic. Ch1 different It's x2 output is not divided down
This issue is caused output on pin NDRVA. About 9.39V to input U2 pin ch1 DM74LS393N Dual 4 bit binary counter This input would be no more than 5.5VPic. Ch1 different It's x2 output is not divided down