Conrad DIGI 35 CPU
Revision as of 19:37, 13 January 2014 by Matthias Heidbrink (talk | contribs)
| Status | in progress |
|---|---|
| Channels | 1 |
| Voltage/current (CH1) | 0-35V / 0-2.55A |
| Connectivity | RS232 |
| Features | settable values, interval and timed power-off functionality |
The Conrad DIGI 35 CPU is a one-channel digitally-controlled laboratory power supply with RS-232 connectivity. It came onto the market in 1992.
Hardware
ICs
- Motorola 68HC05C4 (CPU)
- DAC-0802L (2x)
- LM-336 Voltage Reference
- TODO
RS-232 Interface
The RS-232 interface is equipped with a DB-9 plug in DTE configuration. It only receives data, but does not send any and uses no handshake lines.
Communication parameters 8n1, 9600 (power-on default), 4800, 2400 and 300 baud are supported.
To convert it to a more common DCE configuration, unplug and open the device and solder the RxD line from pin 2 of the DB-9 socket to pin 3.
Photos
- TODO
Protocol
ASCII based.
| Vxxx <CR> | Set voltage to xx.x V resp. set special function. |
| Cxxx <CR> | Set current to x.xx A. |
| L <CR> | Lock keyboard. |
| E <CR> | Enable keyboard. |
| U <CR> | Increase voltage by 100 mV |
| U <CR> | Decrease voltage by 100 mV |
Special functions:
| 800 | Set baud rate to 300. |
| 801 | Set baud rate to 2400. |
| 802 | Set baud rate to 4800. |
| 803 | Set baud rate to 9600. |