1ã Bulb innovation
If you want to save electricity, because the lighting of the corridor is only to see the stairs, its illumination can be low. According to the selection of semiconductor lighting devices - light-emitting diodes provided by the market, a single light-emitting diode of more than 1W can be selected for lighting, or multiple low-power light-emitting diodes can be selected for combination and assembly, which can also meet the needs of corridor lighting. At present, the price of a single light-emitting diode of LW is about 60 yuan, while that of 3W is more than 200 yuan Ï The price of 5mm ultra bright (10000mcd / m2) led is about 1 yuan, Ï 8mm or Ï The price of 10mm ultra bright LED is about 2 yuan. After experiment, 1 Ï 8mm or Ï 10mm ultra bright LED can be directly used for reading at night, 3 Ï 5mm and 1 Ï 8mm or Ï If 10mm is combined, it can be used as a flashlight for night walking lighting (generally 6 commercially available led Briefs) Ï 5mm LED combination). Therefore, the author chooses one Ï 10mm and 6 Ï 5mm is combined for corridor night lighting, which can fully meet the requirements. The combined structure is shown in Figure 1.
In order to facilitate compatibility with the existing lamp cap, the following modifications are made.
1. Look for a broken incandescent bulb, remove the glass shell, and then remove the tungsten wire frame, but two electrode columns must be retained. One is used as the power interface of the LED lamp cap, and the other is used as the connecting fixed support.
2. Install 7 light-emitting diodes on the experimental board as shown in Figure L. the spacing between the bases of each light-emitting diode is 5mm. Cut off the installation area and cut it in a circle.
3. Connect 7 light emitting diodes. Connect the positive pole of each LED in series with a 100 Ω resistor, then connect the other end of the seven resistors in parallel, and connect the negative pole of the seven LEDs in parallel. See Fig. 2 for the circuit.
4. Weld the prepared incandescent lamp holder and the two electrodes directly to the positive resistance and negative resistance of the LED. And use two electrodes to fix the plate firmly. It is not necessary to distinguish the polarity during welding, but the positive and negative polarity must be marked after welding. In this way, a lamp cap is made.
2ã Improvement of control circuit
Because the LED is used as lighting, its control and power supply voltage need to be improved.
1. The power supply circuit supplies power to the control circuit and led. The common transformer step-down rectifier filter voltage stabilizing circuit is adopted. The circuit is shown in Figure 3.
2. Control circuit the author uses the pyroelectric induction control principle to make the control circuit. The circuit has the functions of light control and human movement detection, and has high detection sensitivity. It is one of the preferred circuits for corridor intelligent night light control. Since the principle of pyroelectric induction circuit is introduced a lot, only the circuit and device parameters will be shown here for reference. The circuit is shown in Figure 4.
3ã Use
Install the modified control circuit at the original control circuit. It should be noted that the original 220V power supply to the lamp holder must be changed to about 5V and supplied by k-1 in Figure 4 (Note: at the same time, the original zero line must be changed to the negative line in Figure 3). The positive pole must correspond to the positive pole when wiring and installing the lamp cap.
If it is necessary to adjust the sensitivity and power on time of the control circuit, adjust R9, R10, C6 and C7 according to the circuit in Figure 4.
After the above changes, the night lamp can not only be used for energy saving and cost saving in corridors, but also can be used in places with low lighting requirements such as family toilets and sundry stacking rooms.
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You are got a coupon.":"تهانينا! لديك قسيمة.","Congratulations! 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Please contact customer service":"مركز المستخدم خارج الخدمة. يرجى الاتصال بخدمة العملاء","There is no amount to withdraw":"لا يوجد مبلغ للانسحاب","There is no data to export":"لا توجد بيانات للتصدير","This is Text":"هذا هو النص","This is title":"هذا هو العنوان","This transaction has failed.":"فشلت هذه المعاملة.","Time to shop":"الوقت للتسوق","Tips":"نصائح","To be commented":"ليتم تعليقها","Total":"المجموع","Tutorial":"الدورة التعليمية","This Supplier/Shipping Company does not deliver to your selected Country/Region.":"لا تقدم هذه الشركة/شركة الشحن إلى بلدك/منطقتك المختارة.","Update password success":"تحديث نجاح كلمة المرور","Upload Image":"تحميل الصور","Upload up to 6 pictures":"تحميل ما يصل إلى 6 صور","uploading":"تحميل","used":"تستخدم","user center":"مركز المستخدم","Upload Invoice":"تحميل فاتورة","valid now":"صالح الآن","Validity period":"فترة الصلاحية","View Cart & Checkout":"عرض العربة","views":"الآراء","Valid for":"صالحة ل","Welcome to the website":"مرحبا بكم في الموقع","Western Union":"الاتحاد الغربي","When your buyers received and confirmed orders, you can get commission right now!":"عندما تلقى المشترين أوامر مؤكدة ، يمكنك الحصول على العمولة الآن!","Withdrawal":"انسحاب","Withdrawal success":"نجاح الانسحاب","Withdrawal Method":"طريقة السحب","Write a Review":"أكتب مراجعة","Withdrawal Amount":"كمية السحب","Yes":"نعم","Yesterday":"في الامس","You are clicking too fast":"أنت تنقر بسرعة كبيرة","You are got a coupon.":"لديك قسيمة.","You can select a maximum of 90 days":"يمكنك تحديد 90 يومًا كحد أقصى","You can withdraw the commission to your Paypal account.":"يمكنك سحب اللجنة إلى حساب PayPal الخاص بك.","You haven’t chosen an address yet":"لم تختار عنوان حتى الآن","You haven’t selected a product yet":"أنت لم تختار منتج حتى الآن","Your rating":"تقييمك","Your review":"مراجعتك","Your shipping address error":"خطأ عنوان الشحن الخاص بك"}}