Transformer part ID please

Adrian Graham witchy at
Mon Jan 23 12:48:47 CST 2017

On 22/01/2017 20:10, "Tony Duell" <ard.p850ug1 at> wrote:

>> That looks like an opamp to me, with bias pins connected to GND?
> Does it? It looks like a 555 timer to me at first glance. I would have
> expected another
> capacitor from pins 2/6 to ground though.
> 1 Ground
> 2 Trigger (linked to threshold, and to output via a timing resistor)
> 3 Output (driving the MOSFET)
> 4 Reset/ (pulled high via a resistor)
> 5 Control Voltage (decoupled to ground)
> 6 Threshold (see 2)
> 7 Discharge (not used here)
> 8 Vcc

I didn't think of a 555 in that scenario but that makes sense. I've marked
it as such for now, cheers!

Tonight it's 'address pins and why I get inconsistent results on a logic
analyser while looking at everything that touches A7' :)

Binary Dinosaurs creator/curator - the UK's biggest private home computer

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