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Step 2Putting it all together
As I said, it is pretty straight forward. If you get one of the PC boards made to put the socket in the center column of the board, and has traces that go from the initial solder point outwards and fan out a bit for easier soldering.
Solder in the parts and wires to connect the various parts as shown in the schematic.
Remember to solder pin 2 to pin 6. Solder the decoupling capacitor, C3 (not shown) between Power in and ground if you are not using a battery. If you wish to use the optional frequency adjustment, add it in series with R1. Power goes to pin 4 (5-15 v DC). R2 is the connection from pin 6 to pin 7. Since we are not going to use pin 5, the control voltage, we should decouple it to ground with a 10 nF capactor (C2 :-) .
Overview of the 555. Pin 1= ground
Pin 2=trigger
Pin 3=output
Pin 4=reset
Pin 5=control voltage
Pin 6=threshold
Pin 7=discharge
Pin 8=3-15 vdc
Solder in the parts and wires to connect the various parts as shown in the schematic.
Remember to solder pin 2 to pin 6. Solder the decoupling capacitor, C3 (not shown) between Power in and ground if you are not using a battery. If you wish to use the optional frequency adjustment, add it in series with R1. Power goes to pin 4 (5-15 v DC). R2 is the connection from pin 6 to pin 7. Since we are not going to use pin 5, the control voltage, we should decouple it to ground with a 10 nF capactor (C2 :-) .
Overview of the 555. Pin 1= ground
Pin 2=trigger
Pin 3=output
Pin 4=reset
Pin 5=control voltage
Pin 6=threshold
Pin 7=discharge
Pin 8=3-15 vdc
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