CLAP SWITCH
**broken link removed**
general description
used to turn a device on or off by sound only, eg; clap. when triggered in ckt. it will stay on or off till triggered again.
how it works
ckt has 2 stages - preamp usin trans. q1 4 amplifying mic signal. second consists of 2 transistors q2 and q3 as a FLIP FLOP. (can some one explain this part of the circuit to me.)
flip flop is triggere by preamps o/p. it in turn triggers o/p transistor q4 which controls relay. (can someone explain connection of a 5-pin relay to me. is my interpretation at the bottom of the page correct.).
with each change of state of the FLIP FLOP o/p transistor will be forced to chage state being on or off. this in turn turns the relay on or off. relay is changeover type and it's contacts are rated 220 v/ 3a/6a. microphone is condensor type 4 gr8er sensitivity.
[/i]
**broken link removed**
general description
used to turn a device on or off by sound only, eg; clap. when triggered in ckt. it will stay on or off till triggered again.
how it works
ckt has 2 stages - preamp usin trans. q1 4 amplifying mic signal. second consists of 2 transistors q2 and q3 as a FLIP FLOP. (can some one explain this part of the circuit to me.)
flip flop is triggere by preamps o/p. it in turn triggers o/p transistor q4 which controls relay. (can someone explain connection of a 5-pin relay to me. is my interpretation at the bottom of the page correct.).
with each change of state of the FLIP FLOP o/p transistor will be forced to chage state being on or off. this in turn turns the relay on or off. relay is changeover type and it's contacts are rated 220 v/ 3a/6a. microphone is condensor type 4 gr8er sensitivity.
[/i]