Connection of the power supply-
Connect the AC adapter to the circuit via the connector.
Connect the AC adapter to the power supply outlet. Check the output voltage polarity. ( Which line is plus and minus or which confirms. ) Absolutely do not short-circuit. After confirmation, remove the AC adapter from the power supply outlet.-
The capacitor is including in the AC adapter. So the output voltage of AC adapter dose not drop soon. The electric discharge time depends on the value of the capacitor including in the AC adaper.
Output it may be dangerous when it short-circuits carelessly. However, as for capacity is small, there is not case it gets broken even if it short-circuits.
A little spark appears.
Solder the power supply wire to the circuit. The red colored twised wire is soldered to 25I, and the black colored twised wire is soldered to 25K. Check the power supply voltage Clean the work bench. It is dangerous when there be metal etc., because the work from this supplies and carries out the power supply. It is for the sense. It's better to work on the insulation sheet. When you carry out it on the desk of the metal the paper or vinyl of a rather thick are spreaded. The sheet of the rubber is best. The tester is made the DC voltage measurement mode. The measurement range makes the range close to it with 15V over. Connect the AC adapter to the circuit. Connect the AC adapter to the power supply outlet. Touch the black side stick(minus) of the tester to 25K. ( Other piont connected with 25K is available. e.g. some point from 11O to 24O ) Check the +12V voltage.-
It is OK that the voltage is over +12V at the following point.
Even if the rating output voltage of AC adapter is +12V, actual output volage is not constant +12V. Usualy, the output voltage is high without loading. Under +15V is OK. In my case it was 13.7V.
Touch the red side stick of the tester to 25I.
Touch to 3L.
Touch to 22M.
The check point above are enough, because the wiring check is completed.
Check the +5V voltage.-
It is OK that the voltage is +5V at the following point.
The output voltage of three terminals voltage regulator is constant +5V.
Touch the red side stick of the tester to 22G.
Touch to 22C.
Touch to 16E.
If the +5V voltage at above point is not appeared, see 'Troublr shooting'.
Remove the AC adaper from the power supply outlet. Disconnect the power supply wire of the circuit from the AC adapter. Mount the IC1 Check the voltage of +5V line and +12V line it is becoming zero-volt before mounting the IC1. Mount the IC1 to the IC socket. You pay attention in the position of the pins.The leads of IC of the new article are opening in outside a few. Then it is difficult to insert to the IC socket a little. In case like that, it is easy to push of leads of IC inside a few for arrangement a form before insert the IC.
Because IC has many pins, it is better to check again even if the leads of IC fitting to the contacts of IC socket before push down.
After checking the fitting of the leads of IC to the IC socket, push down the IC and mount it to the IC socket.
Check the operation Connect the power supply wire of the circuit to the AC adapter. Connect the AC adapter to the power supply outlet.