- 1 PHCC Daughterboards Overview
- 1.1 Input
- 1.2 Output
- 1.2.1 General Information
- 1.2.2 Analog Output Daughterboards
- 1.2.3 Digital Output Daugterboards
- 1.2.4 Servo Controller Daughterboards
- 1.2.5 Stepper Controller Daughterboards
- 1.2.6 Aircore Controller Daughterboards
- 1.2.7 LED, 7-segment displays, and other segmented displays
- 1.2.8 LCD
- 1.2.9 D'Arsonval Meter Movement
- 1.3 Other
- 1.4 Non-PHCC
PHCC Daughterboards Overview
explain Daughterboards here.
- momentary contact
- permanent contact
- Flip Switches
- Rotary Switches
- just as rotary selectors, eg. Power Sel: APU, external Power, Engines
- as incremental switches, eg. turning left decrements, turning right increments
- ... and similar momentary or permanent on/off devices
- Rotary Encoders
- 2 bit gray code quadrature
- other devices with 0-5V variable output
Each PHCC Motherboard can read up to 1024 digital input channels. These inputs are available through Keymatrix Daughterboards. Each Keymatrix Daughterboard provides 64 inputs, in an 8x8 matrix. Each PHCC Motherboard allows up to 16 Keymatrix Daughterboards to be connected.
The matrix organization means that you only need 16 (instead of 128) wires from PHCC to each set of 64 switches.
- KEY64_251 (Strictly speaking NOT in matrix organization. Has one common wire for each input. So, there are 64+1 wires per board.)
Decodes quadrature encoded signals from mechanical and optical rotary encoders and makes the signals available for input to the Keymatrix Daughterboards.
Analog input (0-5V) or variable-resistance devices (aka. potentiometers, rheostats) can be used as an input to the PHCC system via the 35 analog inputs on the
Available or planned outputs
You want to control
- 7segment displays
- alpha-numeric segmented displays
- bar graph segmented displays
- character lcd displays
- d'arsonval movements (meter movements, those small coiled instruments found eg in analog multimeters)
- air core instruments
- dc motors
- Planned for the future: Syncro driver.
Stepper Controller Daughterboards
Aircore Controller Daughterboards
- DOA_stepper_293 (with different firmware)
Segmented displays (7-segment, 14-segment, starburst, etc), LED bargraphs, as well as individual LEDs can be driven by the following controllers:
- DOA_7seg (both common anode and common cathode)
- DOA_7seg_2803 (older, common-cathode only revision of DOA_7seg)
- DOA_7seg_2981 (older, common-anode only revision of DOA_7seg)
- DOA_630_2803 (old, runs only on slower DOA clocks)
- DOA_877_4067 (old, runs only on slower DOA clocks)
see UPHCC sister project.
There has been a DOA bus based LCD controller prototype (DOA_char_lcd), but it was determined that the DOA bus does not have the bandwidth to properly drive LCDs with frequent updates, esp. not when several displays are connected and need to share bandwidth among themselves and all other types of DOA daughterboards.
The UPHCC-lcd board (see link above) is much more versatile, as it supports 4-12 displays, allows LCDs with different controller types (read communications protocols), and supports both character dot matrix as well as graphical dot matrix displays. UPHCC-lcd even allows you to mix and match displays of the just described variations.
D'Arsonval Meter Movement
D'Arsonval meter movements, aka. galvanometers, can be controlled directly from the DOA_AnOut1 outputs.
The default method to connect PHCC to the computer is via the RS-232 serial port. While PHCC could do more, most PCs are limited to 115200 bit/second. This puts the effective bandwidth at about 11520 bytes/sec.
The problem is that new computers often don't have serial ports anymore. They want you to use the Universal Serial Port (USB) instead.
So, PHCC gives you the option to plug in a small daughterboard (PHCC_iface_USB_FTDI232) directly onto the motherboard Instead of using the RS-232 serial port. You have to remove the MAX232 IC though.
This board is described here:
Note: Instead of the PHCC_iface_USB_FTDI232 board, you can just buy a standard USB-serial adapter. This is easier, cheaper, and does exactly the same thing.
- DOB_term (terminator for the end of the DOB bus)
see Bus Differential Converter.
Bus Differential Converter
- PHCC_LXLAT_DOA-dDOA (level translator DOA->differential DOA)
- PHCC_LXLAT_dDOA-DOA (level translator differential DOA -> DOA)
- THVP, a parallel port PIC microcontroller programmer (aka. PIC burner)