Nguyn Vn Ti c Cch lm thit bLm dng c kim tra cng USBBi vit cp nht vo 13/10/2010 11:18:52

Cc dng c cn thit: - Bn mch nh - Cng USB (u cm) - Hai in tr 22K - Mt in tr 1K - Mt in tr 100 ohm - Mt din tr 1.5K - Mt diode 3.3V - Mt diode 1N4148 - Hai n LED (xanh v , hoc mu khc ty thch)

S thit b

Cc linh kin chun b

u tin, bn cn thit k li cc ng mch tht gn gng nh trong hnh. Sau in vo PCB (bo mch) v dng phng php truyn thng to thnh mt PCB hon chnh

Gt b phn nha ca u cp USB i li ra phn li. Sau chuyn bn ng dy (hai dy tn hiu v hai dy ngun) sang hai bn nh trong hnh c th gn u USB vo PCB

Gn kt cc linh kin cn thit theo s mch n khi hon chnh

Kim tra tht cn thn cc ng mch trc khi s dng. Nu lm theo ng cc thit k theo hng dn th cng USB s hot ng tt khi n LED mu xanh sng v Windows hin ra thng bo nhn din c mt thit b USB. Ngc li, n LED mu s sng (tc c mt trc trc no ) Cc bn c th lm thm v cho thit b ny Thank you nguyenvantaiducfpt