No edit summary |
No edit summary |
||
| Line 22: | Line 22: | ||
The second assignment was to build a fancy electronic switch. I built a construction of a basic 555 timer circuit (creating a square wave oscillation connected to a speaker) which power on/off is triggered by a connection of two contacts. I put the contacts into a water filled glass tube which was set over a flame. Immediately after the water is boiling the expanded water volume let current pass to the circuit. | The second assignment was to build a fancy electronic switch. I built a construction of a basic 555 timer circuit (creating a square wave oscillation connected to a speaker) which power on/off is triggered by a connection of two contacts. I put the contacts into a water filled glass tube which was set over a flame. Immediately after the water is boiling the expanded water volume let current pass to the circuit. | ||
[[Image:Sketch_temp_switch.jpg]] | |||
[[Image:Sketch_switch_ha_1.jpg]] | [[Image:Sketch_switch_ha_1.jpg]] | ||