Load64

General Category => Other MODs => Topic started by: Remzi on March 12, 2019, 01:21:25 PM

Title: Powering The PI1541 From The Tape Port
Post by: Remzi on March 12, 2019, 01:21:25 PM

I tried to power the PI1541 through the USB port first.It was getting stuck at the "searching for" screen.

I checked the voltages on the USB pads and the GPIO pins and found out there is a 0.7V voltage drop between them.That shows the USB power protection and regulator circuit is using quite a bit of power.
So I connected the power from the tape port direct to the GPIO pins.

(http://www.load64.com/up/rasp.png)

(http://www.load64.com/up/rasp2.jpg)

It is possible to reduce the power consumption of Raspberry PI by disabling the HDMI,WIFI,Bluetooth,Ethernet and USB ports.I added the commands to config.txt file on the SD card.

Code: [Select]

dtoverlay=pi3-disable-wifi
dtoverlay=pi3-disable-bt
tvservice -o
dtparam=act_led_trigger=none
dtparam=act_led_activelow=on
tee /sys/devices/platform/soc/3f980000.usb/buspower >/dev/null

kernel_address=0x1f00000
force_turbo=1
I tried hooking it up to my LCD TV with the HDMI cable and found out it was still working.So these commands didn't do a thing.I will try to contact Steve White and ask him about this.