Search found 21 matches
- Fri Nov 14, 2008 9:38 am
- Forum: General Discussion
- Topic: TIP3055 NPN transistor thru put
- Replies: 40
- Views: 16976
TIP3055 NPN transistor thru put
This transistor is rated as high speed switching and power amplifier. My problem is that it will only support a .7 amp load going thru it from a 12 volt car battery. If I hold the gate high directly from the battery , the amps are the same as when pulsed with a 555 timer. The real amp load is 2.12 A...
- Fri Aug 10, 2007 10:43 am
- Forum: General Discussion
- Topic: Strange AC Power Issue
- Replies: 214
- Views: 132350
- Fri Aug 10, 2007 10:35 am
- Forum: General Discussion
- Topic: SEND AND RECEIVE CIRCUIT ON THE SAME SPLIT POWER SUPPLY
- Replies: 6
- Views: 2840
- Fri Aug 10, 2007 8:08 am
- Forum: General Discussion
- Topic: SEND AND RECEIVE CIRCUIT ON THE SAME SPLIT POWER SUPPLY
- Replies: 6
- Views: 2840
I can block the light path (I.R.) or simply disable the sending cicuit and the microphone is still audible on the amplification side. Some how the Mic is feeding thru the common power supply. I will try to feed one side thru one diode and the other thru another diode from the +12 post. I guess the -...
- Thu Aug 09, 2007 10:24 am
- Forum: General Discussion
- Topic: SEND AND RECEIVE CIRCUIT ON THE SAME SPLIT POWER SUPPLY
- Replies: 6
- Views: 2840
SEND AND RECEIVE CIRCUIT ON THE SAME SPLIT POWER SUPPLY
Gentlemen, The subject I am on is Pg. 120-121 of Science and communiction circuits and projects (Engineers's MiniNotebook) Forrest Mims III This circuit has two sides . The sending side uses a microphone to modulate an I.R. beam which is focused onto an I.R. phototransitor on the other circuit. Both...
- Sun Apr 01, 2007 10:03 am
- Forum: General Discussion
- Topic: April 2007 page 70 - fig #1
- Replies: 0
- Views: 1596
April 2007 page 70 - fig #1
Switch S1A is causing some incredulity on my part if it is able to make lmp1 ,lmp2 or SO2 operate at any time. If you insist , I'll have to make the circuit to believe it.
Oxford
Oxford