Remote control using telephone by KT3170 Here is a teleremote circuit which enables switching on and off of appliances through telephone lines. It can be used to switch appliances from any distance, overcoming the limited range of infrared and radio remote controls…..

Remote Control via GSM Mobile Phone Velleman’s MK160 remote control acts as a mobile phone activated relay to turn on lighting, heating, open a gate, simulate presence, or activate an alarm. The remote control works by sensing the backlight on mobile phones that light when a call is being received (activated spare cell phone required and sold separately)….

Telephone operated DTMF remote by KT3170 The circuit given below is of a telephone operated DTMF remote. The circuit can be used to switch up to 9 devices using the keys 0 to 9 of the telephone. Digit 0 is used to switch the telephone system between remote switching mode and normal conversation mode. IC KT3170 (DTMF to BCD decoder) is used to decode the DTMF signals transmitted over the telephone line to corresponding BCD format….

This is touch switch schematic very well. There are a lot of circuits. The main idea is low cost and easy to makes.
Touch Switch This be Very Simple Touch Switch Circuit. It used UJT 2N3819 is Main part numbers should set up this outside building circuit. …

Electronic Touch Switch Mechanical contacts have the disadvantage that they wear out. That is why it is practical to use an electronic ‘touch switch’ in some situations. With such a touch switch the resistance of the human skin is used for the switching action….

Bounceless switch using IC NE555 This is circuit Bounceless Switch ,Use IC 555 Timer for Easy Timer circuit. Output pin 3 pluse 0.1s. Control by push S1……

One Button On Off Switch by 4093 and IRFZ44 The load is driven by the MOSFET IRFZ44 and 4093 AND gates are used in the circuit. The output of the 4093 IC drives the MOSFET. Only one button allows you to change the on-off state of the electronic circuits in which you use this switch. …..

Relay Timer switch By IC 555 and 741 In Fig.1 see a 100 second delayed turn ON relay RL1 switch, if plug power +12V in circuit. In Fig.2 see a two range 6-60 second and 1-10 minute auto turn off relay timer circuit, with 555. ….

On Off Touch Switch Circuit The modern mechanic switches are improved concerning of old technology. We need however many times to replacement some old switch or to check currents bigger than the durability of certain switches or simple we need something with modern appearance. ….

Touch Switch low cost by Timer IC 555 This Touch Switch circuit use a part compares with voltage 2 group , within the integrated circuit timer LM555 or NE555. For perform wait for catch the change of voltage , which be born from way leakage touches by change a finger. …..