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Electronic Selector for 8 Sources
Description
The Elect. Sel. 8 is a simple circuit, with a choice of 8 sources of any sort ,of 8 independent switches. Each switch corresponding with a relay for example the switch S1 activates the RL1 e.t.c. The uses of the circuit are quite a few, choice of entrances in a sound amplifier, choice of command, in a digital circuit etc. In each entrance a LED which may be independent, except if switches with led are used.
Circuit diagram
Part list
- R1-8=10Kohms
- R9=470 ohms
- R10-17= 4.7Kohms
- TR1=4.7Kohms Trimmer
- IC1=74LS374
- IC2=74LS27
- IC3=74LS10
- T1-8=BC550
- D1-8=Led 3mm
- C1-3=47nF 63V MKT
- RL1-8= 6-12V DC Relay
- S1-8=Push button SW
circuit from http://users.otenet.gr/~athsam/Electronic_sel_8.htm