73 lines
2.0 KiB
Plaintext
73 lines
2.0 KiB
Plaintext
|
BUILDING A 12 VOLT POWER SUPPLY
|
|||
|
|
|
|||
|
|
Components:
|
|||
|
|
----------
|
|||
|
|
|
|||
|
|
120 v MOV
|
|||
|
|
T1 18 volt @ 2 amp. transformer (Radio Shack # 273-1515)
|
|||
|
|
BR1 Bridge rectifier, 4 Amp. @ 50 PIV (Radio Shack # 276-1146)
|
|||
|
|
C1 4700 <20>F @ 35 v. electrolytic capacitor (Radio Shack # 272-1022)
|
|||
|
|
C2 1000 <20>F @ 25 v. electrolytic capacitor (Radio Shack # 272-1019)
|
|||
|
|
C3 .1 <20>F @ 25 v. disc ceramic capacitor (Radio Shack # 272-135)
|
|||
|
|
7812 voltage regulator (Radio Shack # 276-1660 assortment)
|
|||
|
|
120 volt, 1 amp. fuse
|
|||
|
|
3-wire line cord
|
|||
|
|
sw DPST toggle switch
|
|||
|
|
Jacks and connectors
|
|||
|
|
Perf board or project board
|
|||
|
|
Enclosure
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ
|
|||
|
|
<EFBFBD> <20> 7812 12-volt VOLTAGE REGULATOR
|
|||
|
|
<EFBFBD><EFBFBD>Ŀ <20> <20><><EFBFBD><EFBFBD>
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><>Ŀ
|
|||
|
|
<EFBFBD> <20>
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
<20> <20>
|
|||
|
|
<20> 7812 <20> front view
|
|||
|
|
<20> <20>
|
|||
|
|
<20> <20> Pin 1 = input
|
|||
|
|
<20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> Pin 3 = ground
|
|||
|
|
<20><> <20><> <20><> Pin 2 = output
|
|||
|
|
<20><> <20><> <20><>
|
|||
|
|
<20><> <20><> <20><>
|
|||
|
|
<20><> <20><> <20><>
|
|||
|
|
<20><> <20><> <20><>
|
|||
|
|
1 3 2
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ
|
|||
|
|
<EFBFBD> FULL WAVE <20>
|
|||
|
|
<EFBFBD> Bridge Rectifier <20> BR1
|
|||
|
|
<EFBFBD> <20>
|
|||
|
|
<EFBFBD>+ AC -<2D>
|
|||
|
|
<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
|
|||
|
|
<20> <20> <20> <20>
|
|||
|
|
<20> <20> <20> <20>
|
|||
|
|
<20> <20> <20> <20>
|
|||
|
|
<20> <20> <20> <20>
|
|||
|
|
<20> <20> <20> <20>
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
12-volt Power Supply schematic
|
|||
|
|
|
|||
|
|
|
|||
|
|
sw fuse T1
|
|||
|
|
AC __/<2F><><EFBFBD>ı<EFBFBD>Ŀ ac + 1<><31><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ2
|
|||
|
|
<20> )<29><>(<28><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ 7812 <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>+12v out
|
|||
|
|
grn <20><><EFBFBD><EFBFBD><EFBFBD>Ŀ )<29><>( <20> bridge <20> <20> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20> <20>
|
|||
|
|
---<2D> <20> mov <20> )<29><>( <20>rectifier<65> <20><><EFBFBD>+ 3<> <20><><EFBFBD>+ <20><><EFBFBD>+
|
|||
|
|
<20> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> )<29><>( <20> <20> <20><><EFBFBD> C1 <20> <20><><EFBFBD> C2 <20><><EFBFBD> C3
|
|||
|
|
<20> )<29><>( <20> BR1 <20> <20> <20> <20> <20>
|
|||
|
|
AC __/<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>)<29><>(<28><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĵ- <20> <20> <20> <20>
|
|||
|
|
sw ac <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ
|
|||
|
|
<20> <20> gnd
|
|||
|
|
|