Circuit diagram of CD4069 touch electronic switch

It can be used as a substitute of general on-off switch. It is a bistable switch control circuit. CD4069 is a CMOS inverter IC. The unused inverter input terminal is grounded and the unused inverter output terminal is all empty.

When the S1 switch is pressed for the first time, the relay acts; when the S1 switch is pressed again, the relay is released. Ic1mc14069 (or4069) is a common CMOS inverter for general use. The operating voltage can range from 3V to 18V, but most of its applications are used for 5-15v power supply voltage. The function of D1 in the circuit is to protect the circuit from the damage of relay back voltage. Pay attention not to connect it reversely, or the relay will not act if it causes short circuit during operation. Relay specifications vary with the power supply used, 6V relay can be used when 9V, 12V relay can be used when 9V power supply voltage is higher than 9V. However, when using 12V power supply, R4 (current limiting resistance of LED) should be changed to 390m

This circuit can be used as an alternative to the general on-off switch. It is a bistable switch control circuit. CD4069 is a CMOS inverter IC. The unused inverter input is grounded and the unused inverter output is all empty connected.

When the S1 switch is pressed for the first time, the relay acts; when the S1 switch is pressed again, the relay is released. Ic1mc14069 (or4069) is a common CMOS inverter for general use. The operating voltage can range from 3V to 18V, but most of its applications are used for 5-15v power supply voltage. The function of D1 in the circuit is to protect the circuit from the damage of relay back voltage. Pay attention not to connect it reversely, or the relay will not act if it causes short circuit during operation. Relay specifications vary with the power supply used, 6V relay can be used when 9V, 12V relay can be used when 9V power supply voltage is higher than 9V. However, when using 12V power supply, R4 (current limiting resistance of LED) should be changed to 390m.

  

An isolated electronic switch circuit composed of CD4069

The author has experimented to make the isolated electronic switch with CD4069, which has the advantages of simpler circuit than 555 and more convenient debugging. For readers without frequency meter and oscilloscope, as long as the materials are selected correctly according to the data of R and C in the figure, the oscillation frequency is about 50Hz, and the output duty cycle basic phase is ensured, it can be made successfully. See the attached figure for the circuit.

Working principle: non gate F1, F2, RL, R2, C, etc. constitute a 50Hz square wave oscillator. F3, F4 and F5, F6 + are connected in parallel and then connected in series as inverters in the circuit. When F2 outputs high level, F3 and F4 outputs low level, F5 and F6 outputs high level, V1 is on, V2 is off; when F2 outputs low level, F3 and F4 outputs high level, F5 and F6 outputs low level, V2 is on, V1 is off.

Accordingly, induced voltage is generated in t secondary of transformer, so a and B output 220V / 50Hz AC voltage.

Transformer T is made of E136 silicon steel sheet with a sectional area of 8 × 16. The primary winding is 880 turns with Φ 0.12mm wire, and the secondary four windings are 560 turns with Φ 0.1mm wire. The installation points are r5-r8, vd3-vd6 should be close to v3-v4 pin to ensure the safe operation of the pipe.

  

Universal remote control touch switch made of CD4069

The infrared receiving head receives the infrared signal from the remote controller, and its output pin outputs low level, which is coupled to the amplifier composed of ICD via C5, R9 and C6 for amplification, D12 for detection, and after ICC shaping to trigger the bistable circuit (the bistable circuit composed of ICA, ICB and peripheral components), so as to turn the bistable circuit over, trigger on or off the thyristor, so as to turn on or off the light remotely Objective. If you touch the button an by hand, you can also turn on or off the light. When the light is not on, the 220V AC power supply is rectified by full bridge D1-D4 full wave, LED power supply indication (convenient to find the switch position at night), R1 voltage reduction, C1 filtering, DW voltage stabilization, providing 5V direct source for the circuit; when the power supply is on, about 5V voltage drop is formed by d5-d9 connected in series in the load circuit, and scr2 supplies power to the circuit after conduction.

The switch is connected in series with the load (electric lamp or other electrical appliances), meeting the requirements of single line system, so it can directly replace the original wall switch. This switch can be suitable for any lamp. When the load is fluorescent lamp or energy-saving lamp, a 1-3uf capacitor should be connected in parallel at both ends of the load. When the magnetic conductor fluorescent lamp is not connected with the capacitor. As long as the components are in good condition and the welding is correct, they can work normally when powered on, but pay attention to safety when powered on, because every part of the circuit is powered on. The integrated circuit can be CD4069 or cd40106, as long as four reversers are available, the SCR can be br169, and the d1-d9 can be IN4007. The load of this switch shall not exceed 100W unless the power of thyristor and diode is increased.

  

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