ElectroVibe IC1 ?

[nkt$275]

On the board above the LT1054 and 47R there is a shape like a transistor with three holes no label. In another thread I saw the shape labeled as IC1. Since there is no build doc -
What component is this ?

 

[nkt$275]

I am not familiar with that component.
Or I should say ordering the proper component. I know what a voltage regulator is but not the specific one for the ElectroVibe circuit.
I have the board finished except that component.
Thank You ! ! !

 

[nkt$275]

Tayda -
MC78L15A
15v. 0.1A TO-92
Is this correct ?

 

[Mcknib]

That's the beast or search 78L15

Voltage regulators with the 78 prefix are positive output 79 negative output you want positive

 

[JamieJ]

I think I used a 78L12 for mine which was recommended here somewhere.

 

[nkt$275]

Thank You ! ! !

 

[music6000]

I think I used a 78L12 for mine which was recommended here somewhere.

78L12 is the correct value, 78L15 creates ticking noise when tried in Builds.
7371 bulb and 7532 photocell.

 

[zgrav]

so the regulated portion is 12V instead of 15V. right?

 

[nkt$275]

Who is a good source for 7532 photocells ?
I have heard photocells are as finicky as
germanium transistors.
How are you choosing/calibrating them ?
What are the best/acceptable measurements ?

 

[fig]

Has anyone ever tried a photo-transistor in place of a photo-cell?

 

[nkt$275]

The 7371 bulb from Digikey hits the lid of the 1590BB enclosure. I saw another member had the same problem. There is no place to gain space. The Dual pots are snug with the board.
Solutions ?
1. Different bulb - is a 7219 compatible performance wise ? Or another ?
2. Different enclosure - Tayda 1590BB2

 

[nkt$275]

No extra washers. Lid will close.
But touches glass bulb. Just thought perhaps
not a good situation. ? ? ?
By the way Big Monk I have read several of your threads … and enjoy them very much.
Thank You !

 

[ntuncer]

Hi, do we plug 9vdc in electrovibe? I saw that the original uses 24v.

Cheers

 

[Bricksnbeatles]

Has anyone ever tried a photo-transistor in place of a photo-cell?

I’ve thought about finding a way to use phototransistors in a circuit, but I still don’t fully understand them. I’ve thought about testing out photodiodes as clippers in the second clipping stage of a circuit with two clipping stages, with led used as the clippers in the first clipping stage. I still don’t fully understand photodiodes outside of a light-measurement circuit (ie, I have no idea how to use photodiodes outside of a textbook application), but a few quick tests I did a few years ago did suggest that they work as clippers, albeit in a pretty strange and potentially undesirable way.

 

[nkt$275]

Just curious -
For the Electrovibe which voltage regulator is better for the circuit ?
1) Current Quiescent 3 mA with PSRR 51 dB
2) Current Quiescent 6 mA with PSRR 39 dB

 

[nkt$275]

Next Electrovibe Question -
R4 the 47k is on the lower left corner of
the board next to the 22k ? ? ?

 

[ADAOCE]

No extra washers. Lid will close.
But touches glass bulb. Just thought perhaps
not a good situation. ? ? ?
By the way Big Monk I have read several of your threads … and enjoy them very much.
Thank You !

FWIW the bulb touched on my lid too but I just fuckin sent her and it works beautifully

 

[nkt$275]

Thank You once again Big Monk !
Much appreciated.