555 integrated projection automatic protection power failure circuit

The 555 circuit, which contains two voltage comparators, a basic RS flip-flop, and a discharge switch T, the comparator's reference voltage is provided by a voltage divider consisting of three 5K resistors. They respectively make the non-inverting input of the high-level comparator A1 and the inverting of the low-level comparator A2, and the reference levels of the input terminals are 2/3VCC and 1/3VCC. The outputs of the A2 and A2 control the RS flip-flop state and Discharge tube switch status. When the input signal is from the 6 pin, that is, the high level triggers the input and exceeds the reference level 2/3VCC, the flip-flop resets, the output of the 555 pin 3 outputs a low level, and the discharge switch tube is turned on; when the input signal is from 2 The input of the pin is lower than 1/3VCC, the trigger is reset, the 3 pin of 555 outputs high level, and the discharge switch tube is cut off. RD is the reset terminal (4 pins). When RD=0, 555 outputs a low level. Usually the RD end is open or connected to VCC.

555 integrated projection automatic protection power failure circuit
Film screening automatic protection power outage circuit diagram


Headphone Speakers

Headphone speaker:

Headphone speaker is a king of speaker unit which is used for headphone, it also called headphone driver. These speakers have high sound pressure level, fast frequency response, wide frequency response range and low distortion. Headphone speakers are mainly used for voice headphone (e.g. customer service phone, call center headphone, military intercom headset- ) and music headphone (e.g. Bluetooth headphone, sport headphone, game headphone-).

Our main headphone speakers include:

1) From the diameter, we have speakers in 23mm ~ 57mm.

2) From the impedance, we have speakers of 32ohm/150ohm/300ohm/1000ohm.

headphone speaker

headphone speaker

headphone speaker

FAQ

Q1. What is the MOQ?
XDEC: 2000pcs for one model.
Q2. What is the delivery lead time?
XDEC: 15 days for normal orders, 10 days for urgent orders.
Q3. What are the payment methods?
XDEC: T/T, PayPal, Western Union, Money Gram.
Q4. Can you offer samples for testing?
XDEC: Yes, we offer free samples.
Q5. How soon can you send samples?
XDEC: We can send samples in 3-5 days.

Headphone Speaker,Headset Speaker,Earphone Speaker,Headphone Parts Speaker

Shenzhen Xuanda Electronics Co., Ltd. , https://www.xdecspeaker.com