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Optoelectronic Circuits

Six LED stereo VU display circuit built with IC LM3915
The figure below is a scheme diagram of a six-LED three-dimensional VU display c...
led display circuit LM3915Updated: 2024/03/04
Blinking LED circuit diagram based on LDR and resistor
This is perhaps the simplest LED flash, not relying on any semiconductors. This ...
Resistors LED flash LDRUpdated: 2024/02/23
LED Signage with RS232 Port Operation Guide
The LED logo I found is a Pro-Lite PL-M2014R, consisting of 16 characters, each ...
LEDRS232Updated: 2024/02/02
A light fence circuit diagram with LDR
This is a schematic diagram of a grating using LDR as a light sensor. The basic ...
light sensorLDRUpdated: 2023/12/27
LED Flasher circuit using 2 transistors for LED switching
Below is the LEDFlasher circuit using 2 transistors for LED switching. The worki...
LED circuitUpdated: 2023/12/26
Laser detection and indicating device system circuit design
This design requires a laser that is cost-effective and capable of emitting 650n...
Laser detectionUpdated: 2023/12/15
Design and production of rain control and light control timing controller based on P87LPC764
The control circuit uses PHILIPSP87LPC764 microcontroller. The reset circuit use...
Light control circuitUpdated: 2023/12/11
Design and production of a practical electronic counting device
The power supply part of this circuit uses the most common 220V step-down bridge...
electronic countingUpdated: 2023/12/11
Use MC1455PIG to make automatic cycle light-emitting diode circuit
This automatic cycling light-emitting diode circuit can be used in various flash...
ledUpdated: 2023/12/11
Use NE555 to make a lighting and sound changing circuit
Circuit working principle: The internal resistance of the photodiode will change...
NE555 light changing soundUpdated: 2023/11/20
Design and production of digital number answering machine
This article introduces the design and production of a multi-channel answering m...
Digital display buzzer CD4511Updated: 2023/11/20
Musical doorbell without buttons
This article introduces a musical doorbell that does not require buttons. As lon...
Music doorbell productionupc1373ne555Updated: 2023/11/20
Solar battery and charging circuit
For the utilization of this variable electric energy, it is an effective way to ...
solar battery chargingUpdated: 2023/11/20
Infrared detection alarm
The alarm can detect infrared rays emitted by the human body. When a person ente...
infrared detection alarmUpdated: 2023/05/26
Driving circuit for driving light-emitting diodes by IR53HD420
The picture below shows the novel circuit of IR53HD420 driving light-emitting di...
ledUpdated: 2023/01/09
battery charging circuit
battery charging charging circuitUpdated: 2021/12/31
Practical sensitive light-controlled switch circuit diagram
The sensitive light-controlled switch circuit is mainly composed of photosensiti...
light control lighting light controlUpdated: 2021/12/31
Electronic massage and acupuncture device circuit
Updated: 2021/12/31
Low illumination amplifier circuit
amplifying circuitUpdated: 2021/12/31
Infrared remote control device circuit
Infrared remote control device circuit remote control deviceUpdated: 2021/12/31

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