$ 1 32 0.00390625 0 5 50 Black 4448 4800 false

r 928 832 928 1056 0 470000
r 1216 864 1216 928 0 1000000
t 1056 928 1056 832 1 -1 0 0 180
> tr1
r 1056 960 1056 1024 0 2200
t 992 1056 1056 1056 0 1 0 0 100
R 768 832 768 768 0 0 1 9 0 0 0.5 
g 1056 1120 1056 1248 0
g 1216 1152 1216 1248 0
t 768 1088 832 1088 0 1 0 0 100
w 832 1056 928 1056 0
w 928 832 1024 832 0
w 928 1056 992 1056 0
c 928 1088 928 1152 0 2E-06
w 928 1088 928 1056 3
g 928 1152 928 1248 0
r 2176 1056 2176 1312 0 100
> Load
g 1312 1152 1312 1248 0
g 832 1152 832 1248 0
w 832 1152 832 1120 0
w 1056 1088 1056 1120 0
w 1056 960 1056 928 3
x 1600 1088 1632 1088 28 20 More%20load%20on%20output%2C%20so%20V%20across%0A100k%20drops%20reducing%20v%20on%20base%20of%20%0ATr2%20so%20vdrop%20across%20%20470k%20goes%20%0Adown%20%28less%20current%29%20and%20higher%20v%20on%20%0Abase%20of%20Tr3...this%20increases%20the%20base%20%0Acurrent%20of%20Tr1%2C%20therefore%20increasing%0Aits%20current%20whilst%20regulating%20the%20%0Avoltage.....this%20circuit%0Ais%20optimised%20for%20approx%205Vdc%20output%0Aregulation.%0A
x 1056 768 1120 800 5 20 Tr1%0A
x 800 960 864 960 5 20 Tr2%0A%0A
x 992 960 1024 960 5 20 Tr3%0A
w 1216 832 1088 832 0
w 1216 832 1216 864 0
w 768 832 928 832 0
299 1408 960 1536 1056 0 0 0 0 
w 1440 1152 1312 1152 0
w 1440 1152 1440 1056 0
299 960 576 1152 736 0 3 1 0 tr1.Ic%2Atr1.Vce
w 1376 832 1440 832 0
w 1440 832 1440 960 0
w 1376 832 1216 832 3
x 1152 640 1152 672 9 31 W
x 960 544 992 544 4 27 transistor%20dissipation
174 1216 1024 1216 1152 0 200000 0.537 Resistance
w 1216 1024 1216 928 3
w 1216 1024 1088 1024 0
w 1088 1024 1088 1280 0
w 1088 1280 768 1280 0
w 768 1280 768 1088 0
w 1216 1152 1248 1152 0
w 1248 1152 1248 1088 0
299 2304 1120 2464 1280 0 3 0 0 Load.i%2ALoad.Vd
x 2464 1184 2464 1216 9 31 W
x 2272 1056 2304 1056 4 20 Load%20dissipation%0A
x 1248 1056 1280 1024 9 20 100K
w 2176 1312 2176 1344 0
w 2176 1344 1440 1344 0
w 1440 1344 1440 1152 0
w 2176 1056 1568 1056 0
w 1568 1056 1568 1088 0
w 1568 1088 1376 1088 0
w 1376 1088 1376 832 0