Voltage Input
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I have a remote control board that outputs a 9 volt digital circuit. The
question is how can I connect this to a stamp input? My understanding is
that the max on a stamp input is 5 volts.
Thank you
Tim
question is how can I connect this to a stamp input? My understanding is
that the max on a stamp input is 5 volts.
Thank you
Tim
Comments
On Fri, 4 Aug 2000 Trkeenan@a... wrote:
> I have a remote control board that outputs a 9 volt digital circuit. The
> question is how can I connect this to a stamp input? My understanding is
> that the max on a stamp input is 5 volts.
Yes, the input to the Stamp is TTL, 5 volt max.
Use a voltage divider, like this:
10k 10k
9 volt signal
/\/\/\/\
+
/\/\/\/\----
| |
| |
|
| \ \ \
Stamp Stamp's
Pin Ground
By using a pair of 10k resistors, you will be dividing the 9volt signal
in half. So the Stamp will see 4.5 volts. 4.5 volts will be a TTL logic
'high' or '1'. Anything below ~1.4 volts will register as a logic low.
--- Jay
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When I have a simular problem I use a 3 term. regular.
like a LM7805 or simular. Current should not be a problem
so you wont have to use a heat sink. Check it though to make sure.
Hope thjis helps. ______
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IN GND. OUT
Frank
Original Message
From: <Trkeenan@a...>
To: <basicstamps@egroups.com>
Sent: Friday, August 04, 2000 3:42 AM
Subject: [noparse][[/noparse]basicstamps] Voltage Input
> I have a remote control board that outputs a 9 volt digital circuit. The
> question is how can I connect this to a stamp input? My understanding is
> that the max on a stamp input is 5 volts.
>
> Thank you
> Tim
>
>
>
>