<P>如果上锂电,可以考虑使用低压差三端,电路非常简单。要想强弱两档也很容易,一般是把6V改低,例如4V,用一个开关接不同的电阻。但是,6v15w的灯泡的电流比较大,为2.5A,这样大的低压差三端难找一些。以下是国半的1-3A低压差“三”端(不限于3端):</P>
<P><a href="http://www.national.com/VCatalog/view.cgi?command=x%3C%3Dn%3C%3Dy&attr1=Output+Current&attr2=1000.0%2F%2F3000.0&q=25&m0=Category&m1=SubCategory&i=PNumber&s1=PNumber%2F%2F1&s0=Quiescent+Current%2F%2F1&a3=Output+Current%2F%2Fv%3A8&a1=SubCategory%2F%2Fv%3A8&a0=Category%2F%2Fv%3A8&s=705052297050&a2=Quiescent+Current%2F%2Fv%3A8&a5=InputMin+Voltage%2F%2Fv%3A8&t=0&a7=On+Off+Pin%2F%2Fv%3A8&a6=Dropout+Voltage%2F%2Fv%3A8&a8=Multiple+Output+Capability%2F%2Fv%3A8&c1=e%3A0%2F%2FSubCategory%2F%2F%3Aeq%2F%2FLinear+Regulators+-+Low+Dropout+Voltage%3APositive+Voltage+-+Adjustable&c0=e%3A0%2F%2FCategory%2F%2F%3Aeq%2F%2FAnalog+-+Regulators&m2=Bpn&a4=InputMax+Voltage%2F%2Fv%3A8&as=0&render=1&c=&domains=PNumber" target="_blank" >http://www.national.com/VCatalog/view.cgi?command=x%3C%3Dn%3C%3Dy&attr1=Output+Current&attr2=1000.0%2F%2F3000.0&q=25&m0=Category&m1=SubCategory&i=PNumber&s1=PNumber%2F%2F1&s0=Quiescent+Current%2F%2F1&a3=Output+Current%2F%2Fv%3A8&a1=SubCategory%2F%2Fv%3A8&a0=Category%2F%2Fv%3A8&s=705052297050&a2=Quiescent+Current%2F%2Fv%3A8&a5=InputMin+Voltage%2F%2Fv%3A8&t=0&a7=On+Off+Pin%2F%2Fv%3A8&a6=Dropout+Voltage%2F%2Fv%3A8&a8=Multiple+Output+Capability%2F%2Fv%3A8&c1=e%3A0%2F%2FSubCategory%2F%2F%3Aeq%2F%2FLinear+Regulators+-+Low+Dropout+Voltage%3APositive+Voltage+-+Adjustable&c0=e%3A0%2F%2FCategory%2F%2F%3Aeq%2F%2FAnalog+-+Regulators&m2=Bpn&a4=InputMax+Voltage%2F%2Fv%3A8&as=0&render=1&c=&domains=PNumber</A></P>
[此贴子已经被作者于2004-12-6 10:18:19编辑过]
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