I build a linear PSU for my FY6800 with some addons:
I build a linear PSU for my FY6800 with some addons:
- opto isolated USB Interface (4 pol connector with 5V for front board) (CH340G)
- 10 MHz OCXO
- 10 MHz distributor with 2 isolated sine wave outputs (AD8055)
- 50 MHz output for fpga (NB3N502)
- 6 pol connector for external controller board (Blackpill) (with digital poti and reference voltage for OCXO)
Two ldo regulators LM2941/LM2991 with +/- 13V output support the main board. Both can be disabled for power saving (future option).
A DC/DC converter generates 6V for 3 5V LDOs (TLV76750) :
1. Front board and optional controller
2. Main board (can be disabled for power saving)
3. OCXO and 10 MHz distributor (can be disabled for power saving)
The external controller is able to count the 10 MHz pulses with the help of 1PPS pulses and generate a controling voltage for the OCXO.
Option :
In future the external controller should drowngrade the front controller to a display and keyboard unit and take over current control job of the front controller.
This version works but has some mechanical bugs and minor electronical issues.
Therefore I'm working on version 2.0 at the moment:
- Fixing mechanical bugs
- Move the voltage reference and the I²C controled digital eeprom potentiometer from controler board to the PSU board.
(After intial calibration the external controller can be removed )
- use SMA connectors for 10 Mhz and 50 MHz signals.
- add expansion connectors ?
Any comments welcome.
Regards
Rainer
@Labrat101
@Attached are the shematics of version 2.0. (Some resistor values will be modified during first tests)
An eeprom poti for the OCXO voltage and an I²C IO expander are added on the board
I replaced some regulators with THT version to save space on the board and use a heat sink.
I add some sma connctors for HF signals.
Mechanical problems are fixed. (hopefully)
ToDo:
I have to add a connector for controller driven fan.
@ supertrabuco
Yo no hablo español
@Labrat101
@Attached are the shematics of version 2.0. (Some resistor values will be modified during first tests)
An eeprom poti for the OCXO voltage and an I²C IO expander are added on the board
I replaced some regulators with THT version to save space on the board and use a heat sink.
I add some sma connctors for HF signals.
Mechanical problems are fixed. (hopefully)
ToDo:
I have to add a connector for controller driven fan.
@ supertrabuco
Yo no hablo español
Not sure what you want to say. Google translator doesn't really help.
@ battlecoder
Wonderful job. Looks like a killer replacement for the puny supply that comes inside and I would definitely love to upgrade my FY6600 with something like that.
Btw, what @supertrabuco said is "Pretty interesting project. Particularly all the connectors and external control". Then he asks if it would be possible to do the same for the FY6900, and replace the small switching supply for a linear 5V, 1.5A one.
That Just confirms what I Previously have said . Thanks.
Total conformation that the Cyclone Chip was a Fake ..
Maybe Intel pressed charges against them for using there Brand name. .
How well does the Pro 1941 chip work ?
BTW Also my Fy68 had also had v1.9v board .
Sorry No Bad Feeling .
First image is an 11 MHz square wave output, 5VDC p-p. Second is with dots and 1s persistence.