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In lugnet.robotics.handyboard, Wayne Crosbie writes:
> I just added the Sharp IS1U621 to my handyboard. That is apparently a • substitute
> for the ISU160. When I run the simple test program:
>
> while (1) {if (4 & peek(0x1000)) fd(0); else bk(0);}
>
> lights continuously flicker. When I put my logic proble on the output, it is
> continuous pulse. The demodulator does not seem to be working. I also tried a
> second part with the same result.
>
> data sheet for these parts seems to indicate the need for some capacitors on
> the supply and output (47uF and 1000pF respectively)
These are NOT optional components. I saw the same thing with the IS1U60
if I didn't use the 47uf/47ohm low-pass filter on the Vdd input to the part.
Use it, your problem will go away.
have fun,
DLC
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Message has 1 Reply:
 | | Re: Help with IR receive
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| thanks for the help. I just breadboarded the circuit with the RC circuit and the instability has gone away. Now I have to get the extra components on to the HB :) see the datasheet for details: (...) (27 years ago, 17-Dec-99, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Help with IR receive
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| I just added the Sharp IS1U621 to my handyboard. That is apparently a substitute for the ISU160. When I run the simple test program: while (1) {if (4 & peek(0x1000)) fd(0); else bk(0);} my lights continuously flicker. When I put my logic proble on (...) (27 years ago, 17-Dec-99, to lugnet.robotics.handyboard)
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