The product features a detailed technical description with multiple images and a schematic diagram. The main component is a bistable switch built around the common 555 timer IC, which offers a simple yet reliable circuit design with a high output current capability. This allows direct control of relay-type loads, enabling users to turn devices on or off with a single touch.
The circuit, as shown in Figure 1 (click to download the schematic), operates by using capacitors and resistors to control the state of the 555 IC. Initially, when power is applied, capacitor C1 creates a positive pulse at pin 6 of the IC, causing pin 3 to go low. At this point, C2 has no voltage. When the touch button S is pressed, it triggers a "0" level on C2, which affects pin 2 of the IC, causing pin 3 to switch to a high level. C2 then charges through R3. Once the button is released, C2 reaches Vcc, and pins 2 and 6 are biased at 1/2Vcc via R1 and R2, maintaining the high level at pin 3. Pressing S again causes the voltage on C2 to exceed 2/3Vcc, making pin 3 switch back to low. After release, C2 discharges through R3 and pin 3 of the IC. The voltage at pins 2 and 6 remains at 1/2Vcc, keeping pin 3 in the low state. This process repeats each time the button is pressed, toggling the output between high and low.
This bistable switch works effectively when each press lasts less than one second. However, if the button is held down, the output will toggle continuously. The design is ideal for applications requiring simple on/off control without complex circuitry. The use of the 555 IC ensures stability and ease of implementation, making it a popular choice for DIY and industrial projects alike.
KW4-Dustproof Miniature Micro Switch
Features
â—† Inner Housing tunnel design, silicone ring sealing design, stable
sealing IP60.
â—† Small Compact Size,Safety Approvals.
â—† Long life & high reliability.
â—† Wide Range of wires Terminals.
â—† Variety of Levers.
â—† Suit of harsh environment applications, Such as vacuum cle
Wireless Micro Switch,Micro Touch Switch,Ip60 Dustproof Switch,Dustproof Miniature Micro Switch
Ningbo Jialin Electronics Co.,Ltd , https://www.donghai-switch.com