Akula0083 30 Watt Self Running Generator.

[Groundloop]

I am not the best with circuits, So can some one tell me what these are on the circuit.  The Red Arrows of course.
Also where can I buy just a few of the TL494IN's??  USA   

  Thanks ahead of time for your help..
                                       E6

PS..  It seems that all he did to make the core for the L1 was to cut or break the ends off of the E cores he shows in the pics below..

1 = LM7812 Voltage regulator, input (to the right in drawing) up to approx. 35 Volt, output (to the left in drawing) 12 Volt, max. 1 Amp.
2 = 0,22 Ohm 2 Watt resistor.
3 = 1 Ohm 2 Watt resistor.
4 = 1 Ohm 1 Watt resistor.
5 = 7 Ohm 1 Watt resistor.

GL.

[Grumage]

1 = LM7812 Voltage regulator, input (to the right in drawing) up to approx. 35 Volt, output (to the left in drawing) 12 Volt, max. 1 Amp.
2 = 0,22 Ohm 2 Watt resistor.
3 = 1 Ohm 2 Watt resistor.
4 = 1 Ohm 1 Watt resistor.
5 = 7 Ohm 1 Watt resistor.

GL.

Dear Groundloop.

Many thanks!! I was just about to post, and a refresh showed that you had already done it !! What is interesting is that those components have been marked for some reason ?? 

ElementSix, welcome !!  .   I think the cores are just a standard type, see here,  http://www.overunity.com/14378/akula0083-30-watt-self-running-generator/msg391353/#msg391353

Good luck, Cheers Grum.

[dllabarre]

Dear Groundloop.

Many thanks!! I was just about to post, and a refresh showed that you had already done it !! What is interesting is that those components have been marked for some reason ?? 

ElementSix, welcome !!  .   I think the cores are just a standard type, see here,  http://www.overunity.com/14378/akula0083-30-watt-self-running-generator/msg391353/#msg391353

Good luck, Cheers Grum.

From what I can see the markings correspond to the Watts of each resistor.
1 mark = 1 Watt
2 marks = 2 Watts.


DonL

[Grumage]

From what I can see the markings correspond to the Watts of each resistor.
1 mark = 1 Watt
2 marks = 2 Watts.


DonL

Dear Don.

Yes I see !! I had not thought of that !! Good observation, together we will crack this !!

Cheers Grum.

[TinselKoala]

http://www.ebay.com/itm/2pcs-IC-TL494IN-TL494-NEW-/300583653092

I don't know why you want the IN version though. Why not use the CN version?

http://www.ebay.com/itm/5-x-TL494CN-TL494-PWM-Power-Supply-Controllers-IC-TEXAS-/320650810136

I've ordered parts from the latter vendor several times and I am completely happy. Free shipping and from Colorado, he's an outlet for the Chinese factories. Usually takes four or five days for the order to arrive here in TX.

ETA: This latter vendor also has a very good price for the IRF3205 mosfets, the 7812 VR, etc. Check him out.

The 494 in its various versions has been used to clock TCs for many years. It is the oscillator at the heart of my TinselKoil 2, for example, a SSTC of the kiloWatt class.

ETA: Here's the data sheet. Can you spot the difference between the IN and CN versions? There is one.....

http://www.ti.com/lit/ds/symlink/tl494.pdf