[Ronja] Testing switching time of an LED

[Deepak Mishra]

Thanks, finally a reply I was looking for.

Cheers,
Deepak

On 22/03/2008, Gullik Webjörn <gullik.webjorn at flysta.net> wrote:
>
>  I have used a single 74HC14 or 74AC14 or 74LVC14 inverter with a simple
> resistor between input and output
> and a small variable or fixed capacitor between input and ground. These
> oscillators are described in the
> data sheets. The single inverter drives remaining 5 inverters in parallell
> aka ronja driver, and their output
> to a resistor and then the LED under test. You can build this test ckt in
> 3 minutes.
>
> To measure, just use a pin diode, with a 50 ohm resistor close to the
> scope input. Anode to 50 ohm,
> cathode decoupled with 10 nF to ground, 5 V or so for bias.
>
> Gullik
>
>
>
>
> --
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>
>
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