It is the high cost performance of usa green laser pointer

Figure 5 with a dedicated remote control integrated circuit chip, BA5104, BA5204 (Editor's note: BA5104/5204 now does not produce, instead of model SM5031/5032) and M6938 production of semiconductor laser photoelectric switch transmitter and receiver circuit. Figure 6 (a) The BA5104 is a transmitter chip, the K1 ~ the K8 is the control input, internal pull-up resistor. When either a key is pressed, the OSC1 and OSC2 pin internal clock circuit and oscillator circuit composed of an external 455kHz crystal, capacitors C1, C2 onset, frequency generator 38kHz carrier frequency divided by the internal circuitry. And then the user should require the customized service of   green laser pointer    suitable to them according to the actual situation.
The BA5104 C1, C2 clients and K1 ~ K8 pin input data is encoded, the serial output from D0 side, sent the signal of the modulated carrier pulse laser-driven semiconductor laser tube LD after Darlington D1581 amplification. Potentiometer W to adjust the laser tube current, so that it is within the rated operating current. LED side is the launch status display output, high output, the LED illuminates. C1, C2 end user code input, you can set four kinds of encoding. LD semiconductor laser diode in the figure is a key component of the photoelectric switch transmitter. When the receiver circuit shown in Figure 6 (b), when receiving the demodulation module M6938 receives the laser signal. It is the high cost performance of  usa green laser pointer   .
The signal amplification, the selected frequency and pulse demodulation, since the output low, after VT1 reverse, acting on the D1 side of BA5204, through the circuit, the decoded output by the BA5204 3 to 10 feet the control signal. When press the transmitter K1 ~ K6 any to BA5204 corresponding HP-ended output high, release the launch button, the output low; CP1, CP2 end is self-locking reverse level output when you press the K7 , K8, a key, flip of the the BA5204 corresponding CP-ended output level, each time you press, the output level flip once. C1, C2 end user code input. There are four kinds of encoding requirements BA5104 of C1, C2 side settings. Capacitor C1, resistor R2 and BA5204 13 feet of the internal circuit, oscillation circuit, a frequency of 38kHz. The customer should choose   green laser pointer   according to the actual needs of themselves.
AS1117 low dropout voltage regulator, output 3.3V. Figure 7 on the grounds of SCM and phase-locked loop circuit consisting of laser photoelectric switch circuit. Microcontroller programming, coding, modulation function, the circuit greatly simplified, and good stability, conducive to bulk production. In addition, the semiconductor laser tube on the surge, transient over-voltage, over-current is more sensitive, using SCM, in addition to code modulation functions implemented in software, they can still using the software to delay slow start to the laser circuit, which can effectively prevent the laser tube damage caused by power surges. Figure 7 (b) IRM8881V the received laser signal amplification, and demodulation functions, and phase-locked loop is from the decoding role. Especially, the customer should consider the cost performance of   green laser pointer   .
PLL VCO frequency to the frequency of the encoding software, when the receiver to the laser emission of coded modulation signals and amplified by the receiver, demodulation, decoding, 8-ended output of the LM567's a low- level signal in the collector of PNP transistor output a high level, thus completing the reception of the transmitted signal. The form of the output of the receiver can take many forms, such as PNP or NPN transistor driver with relay driver output state are normally open and normally closed two detection methods, diffuse way radio specular reflection mode fiber-coupled way. The customer wants to choose or use   green laser pointer   .