Put the ATmega chip in the center of the board. With the chipmark (the dot) up.
#1 The reset: put the switch over the chip, connect one of the switch leg to ChipPIN 1 and the opposite leg to grund. Connect PIN 1 to power with the 10K resistor
#2 The crystal: put the crystal on PIN 9 and 10. Connect the two crystallegs to ground with the two 22pf capacitor
#3 Ground: PIN 8 and 22 direct to ground.
#4 Power: PIN 7 and 20 direct to power.
#5 Digital and Analog PIN: I put some PINheaders on the board where i found space and followed the PIN map and soldered all the PINs on.
#6 The 5V outputs and GND (that you see on the top picture) are soldered direct to the power and ground wire.
#7 The LED that show if there is power on the board, is connected direct to power and to ground with the 470 OHM resistor.
Digital PIN 13.
Digital PIN (DP) 13 is with a LED. This LED is connected to chipPIN 19 and to ground trough a 100 OHM resistor. The PINheader should be connected parallel to the LED, and with a 100 OHM resistor. So you can use DP 13 direct with a LED after you are done with the board.
NOTE:You might see that I only use DP 0-11 and 13. I did not have enough PINheaders. I hope you can connect DP 12 as well.
#1 The reset: put the switch over the chip, connect one of the switch leg to ChipPIN 1 and the opposite leg to grund. Connect PIN 1 to power with the 10K resistor
#2 The crystal: put the crystal on PIN 9 and 10. Connect the two crystallegs to ground with the two 22pf capacitor
#3 Ground: PIN 8 and 22 direct to ground.
#4 Power: PIN 7 and 20 direct to power.
#5 Digital and Analog PIN: I put some PINheaders on the board where i found space and followed the PIN map and soldered all the PINs on.
#6 The 5V outputs and GND (that you see on the top picture) are soldered direct to the power and ground wire.
#7 The LED that show if there is power on the board, is connected direct to power and to ground with the 470 OHM resistor.
Digital PIN 13.
Digital PIN (DP) 13 is with a LED. This LED is connected to chipPIN 19 and to ground trough a 100 OHM resistor. The PINheader should be connected parallel to the LED, and with a 100 OHM resistor. So you can use DP 13 direct with a LED after you are done with the board.
NOTE:You might see that I only use DP 0-11 and 13. I did not have enough PINheaders. I hope you can connect DP 12 as well.
Check out MegaSquirt. There is a controller in the work to control the 4L60E and 4L80E transmissions. It's all open sourced. You can buy the ECU in a kit form and assemble it yourself. Same controller will work for just about all transmissions. Google MegaShift, your find more info there. DIY Circuit Design: Pulse Width Modulation (PWM) The (ON time + OFF time) of a pulse is called ‘Period’ of the pulse, and the ratio of the ON time or OFF time with the Period is called the ‘Duty Cycle’. Hence the PWM is a kind of modulation which keeps the Period of pulses constant but varying their duty cycle according to the amplitude of the modulating signal.