ICD2 USB - tại sao không tự làm?

[buingocthang]

Goi rieng toi Electronic... nhe van de ma mach cua ban gap phai la do cai mach khong nhan ra duoc con chip cua ban do .dieu nay co the la do dien ap target vpp khong du do mac du MPlab khong bao loi gi het. Ban cung thu voi con 18f86j10 di chi can select->device la du ban kien tra dien ap (promm->setting->power) toi nghi la dien ap targetvpp luc nay la OV do.Day co the la 1 loi nua tu mach cua ban boi dien ap 0v thi lam sao ma nap duoc chu.Con dien ap MPLAB icd2 VPP co the rat cao 12->13V gi do.Cai mach cua toi do duoc dien ap cho con nay la Target VPP la 4.34V con MPLAB ICD2 la 7.51V.