Difference between revisions of "Talk:Tondaj SL-814"

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Circuit mods:
 
Circuit mods:
 +
 
1. Short C3 - causes it to turn on automatically and stay on whenever power is applied.
 
1. Short C3 - causes it to turn on automatically and stay on whenever power is applied.
 +
 
2. jumper USB pin 5 (pin 5 == top most pin closest to top of circuit board where top == LCD display side of PCB) across to 9V power trace (the fat one that runs past the USB connector)
 
2. jumper USB pin 5 (pin 5 == top most pin closest to top of circuit board where top == LCD display side of PCB) across to 9V power trace (the fat one that runs past the USB connector)
 +
 
3. Jumper C12+ to u3 pins 2+3 shorting +9 to +5 (note there are TWO 5V regulators on the board, one for digital +5 and one for Analog +5, a good design practice isolating the two)
 
3. Jumper C12+ to u3 pins 2+3 shorting +9 to +5 (note there are TWO 5V regulators on the board, one for digital +5 and one for Analog +5, a good design practice isolating the two)
 +
 
4. short R8 making "low battery" and associated not helpful auto power off go away
 
4. short R8 making "low battery" and associated not helpful auto power off go away
  
 
Cable mods
 
Cable mods
 +
 
1. My SL-814 from amazon did not come with a cable
 
1. My SL-814 from amazon did not come with a cable
 +
 
2. the "USB" port on the SL-814 is a USB port in physical form only.  What they are doing is using a USB connector to output serial TTL I/O from the Atmel's UART.  it is in no way, shape or form USB and the claims on Amazon etc that it has USB are flat out false.  
 
2. the "USB" port on the SL-814 is a USB port in physical form only.  What they are doing is using a USB connector to output serial TTL I/O from the Atmel's UART.  it is in no way, shape or form USB and the claims on Amazon etc that it has USB are flat out false.  
 +
 
3. Use a PL2303 to TTL cable and a USB type B connector donor cable.
 
3. Use a PL2303 to TTL cable and a USB type B connector donor cable.
 +
 
4. Cut and strip the USB donor cable's B connector side and connect
 
4. Cut and strip the USB donor cable's B connector side and connect
 
   i. black - black (GND)
 
   i. black - black (GND)
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End Result
 
End Result
 +
 
Plug into your PC, assuming you have PL2303 driver should show up as a COM port or /dev/ttyUSBx in the case of OpenWrt/Linux.  From there follow other advice on this wiki regarding commands and responses.
 
Plug into your PC, assuming you have PL2303 driver should show up as a COM port or /dev/ttyUSBx in the case of OpenWrt/Linux.  From there follow other advice on this wiki regarding commands and responses.

Latest revision as of 14:10, 24 May 2013

We have interfaced this SPL meter to a TP-Link MR3020 running OpenWrt OS. The SL-814 had a few jumpers added to enable it to (1) always stay on and (2) be powered from the 5V on the USB connector.

Circuit mods:

1. Short C3 - causes it to turn on automatically and stay on whenever power is applied.

2. jumper USB pin 5 (pin 5 == top most pin closest to top of circuit board where top == LCD display side of PCB) across to 9V power trace (the fat one that runs past the USB connector)

3. Jumper C12+ to u3 pins 2+3 shorting +9 to +5 (note there are TWO 5V regulators on the board, one for digital +5 and one for Analog +5, a good design practice isolating the two)

4. short R8 making "low battery" and associated not helpful auto power off go away

Cable mods

1. My SL-814 from amazon did not come with a cable

2. the "USB" port on the SL-814 is a USB port in physical form only. What they are doing is using a USB connector to output serial TTL I/O from the Atmel's UART. it is in no way, shape or form USB and the claims on Amazon etc that it has USB are flat out false.

3. Use a PL2303 to TTL cable and a USB type B connector donor cable.

4. Cut and strip the USB donor cable's B connector side and connect

  i. black - black (GND)
  ii. red - red (+5)
  iii. green - white (Data)
  iv. white - green (Data)

End Result

Plug into your PC, assuming you have PL2303 driver should show up as a COM port or /dev/ttyUSBx in the case of OpenWrt/Linux. From there follow other advice on this wiki regarding commands and responses.