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Propeller Quick Start Board (rev A) start-up problem — Parallax Forums

Propeller Quick Start Board (rev A) start-up problem

iammegatroniammegatron Posts: 40
edited 2013-08-06 09:19 in Propeller 1
I have this Quick Start Board (rev A) with the simplest program (light up led) in EEPROM. It works fine with USB plugged in for power.

When I switch to powering the board with 9V battery on VIN (J1 pin 40), it sometimes works, sometimes doesn't. I put a 100k pull-up resistor between (J1 pin 40) and (P31,RX of propeller). That doesn't help either.

Is it an inherent board design issue or just I got a bad board. Any similar experiences or solutions?

Comments

  • Duane DegnDuane Degn Posts: 10,588
    edited 2013-08-06 09:19
    9V is kind of a high voltage level for a linear regulator. Maybe the QuickStart's regulator can dump enough heat but I think you'd be better off with a lower voltage battery.

    I use four NiMH cells to power my QS boards regularly.

    I have a bunch of QuickStart links in this thread. Post #29 of the thread shows a battery pack connected to the board.

    I'd be very surprised if your board is bad.
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