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Recent content by Giro

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    How to adapt (normally) PCI Express x1 to work in PCIe Mini Slot

    - - - Updated - - - Disregard previous message. To clarify, contrary to that indicated in the opening post, the product in the second image is now back in stock. Delivery took a little longer due to the virus thing. Upon reciept of it, I plugged it in and it didnt work either, I got very angry...
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    How to adapt (normally) PCI Express x1 to work in PCIe Mini Slot

    Hi Thanks for reply I will get back to you with necessary info re: status of red wire upon boot.
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    How to adapt (normally) PCI Express x1 to work in PCIe Mini Slot

    I get your point but I'm confident its related to pinout mismatch. The red wire, connected to 'Link Reactivation' on the x1 daughter board does not have an eqiuvalent on the PCIe-mini board. It is the only orphaned conection. The green and white wires had to be swapped ( REFCLK +/- resp...
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    How to adapt (normally) PCI Express x1 to work in PCIe Mini Slot

    Hi, Interesting problem with an surely easy fix (I hope). So I have breakout / riser that enables 2x PCIe x1 cards off a PCIx1 slot. Its been tested in x16 slot and is functional. The main PCB and daughter PCB (latter is what plugs into motherboard) are connected via USB 3.0. (USB 3.0...
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    How to get time delay of 90 - 120ms using Passive Components Only

    To those who replied, OP means milleseconds, not microseconds. One RC wont achieve 90 millesecond delay.....
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    Negative dc voltage on earth

    :thumbsup: Hi The red lead was to a GND pin on the SMD usb controller & black lead to usb socket 'casing' (see silver/ALU block in picture top right) - This gives a negative value. **broken link removed** The main regulators and on/off light work so its probable the usb controller specifically...
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    Negative dc voltage on earth

    HI, I hacked into a device that contained rectifiers in it to temporarily power a wireless games console controller. (3v tapped from output of regulator legs to the controllers AA battery compartment). I thought this was pretty neat and/because it worked. Polarity was confirmed correct with a...
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    How to get time delay of 90 - 120ms using Passive Components Only

    I guess a bucket-brigade device is the proper name for what you seek, there may be schematics on the web.
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    [SOLVED] Hotrod some old I2S based SAR ADCs

    Hi, Forgive me if I posted in the wrong sub-forum. I have some SAR with I2s output, encapsulated in a device that I would like to hot rod so to use the converters at a higher rate. The SARs are in dual mono config in a classic 1fs system (no oversampling) which makes things easier, the data /...
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    How to disable or extend 8-bit timer?

    Yeah the picture I was being funny, I'll have a glance at the 555/6 datasheet and post here if I get stuck anywhere. Theres a Maplin local, Thanks again! Giro
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    How to disable or extend 8-bit timer?

    So a timer triggers a relay every 9m which shorts pins 1 and 8 (corresponds to REC push) and another timer demagnetizes relay after 0.5s. A relay prevents the 555 contaminating the MCU which otherwise needs 2 timers. Is it not possible to have one timer alone to do the short? I searched for...
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    How to disable or extend 8-bit timer?

    The MCU is reachable. Most of the traces pass via diodes just before they break off to another PCB. I don't have the tool to solder at the IC terminals which is surface mounted but the diodes provide a tap point. Its actually D712 that is lifted for that sample rate modification I mentioned...
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    How to disable or extend 8-bit timer?

    Truly informative post, thanks Brian. Changing the crystal, I'll keep that in mind. In any case, its definitely possible to make this thing go longer than 10m, I know this because there was an aftermarket version of this recorder unit, modified to do just that. It seems 'easy enough' change...
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    How to disable or extend 8-bit timer?

    Hi, Glad you asked. No access to programming facility. This chip is needed intact for the device it is housed in to work. The whole controller forms part of a tape loading mechanism in a DAT Recorder. I wonder if the timer inside the chip can be turned off or at least extended somehow without...
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    How to disable or extend 8-bit timer?

    Hi, I have a 10minute timer in an old piece of audio equipment I would really like to get rid of. Inside the device, theres a micro controller CXP5058 that consists of 8bit timers. In this case an external oscillator is present, which I think is referred to for timing reference, I have no idea...

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