Renard64

Revision XA board (first revision)

Schematic

Media:Renard64_sch_001.pdf

Layout

Picdimmer forum thread

BOM

PCB
1  TBA                   Renard 64-Port PCB

Resistors

3  299-27K-RC            27K Resistor, 1/4 W, Axial (RS485 pull)     R5,R8,R14
2  299-1K-RC             1K Resistor, 1/4 W, Axial (RS485 series)    R4,R7
1  660-MF1/4DCT52R1200F  120 Resistor, 1/4 W, Axial                  R6
1  299-330-RC            330 Resistor, 1/4 W, Axial (for LED)        R19
2  71-CCF60-15K-E3       15K Resistor, 3/4 W, MF Resistor            R1,R2
 
Capacitors

8  80-C322C104K5R        0.1 uF Radial-lead Ceramic Capacitor        C3-C10
1  647-UVR1C470MDD       47 uF, 16V Radial-Lead Elect. Cap           C2

Diodes
1  78-1N5229B            4.3v 0.5w Zener                             D4 (left)
1  78-1N5239B            9.1v 0.5w Zener                             D4 (right)
1  604-WP7104GT          T1 Green LED                                D5

Connectors

2  571-5202514           AMP Modular Jacks, Right Angle              J3, J4
16 538-95003-2881        Molex Modular Jacks, Vertical PCB mount     J5-16, J18-21
2  571-6404542           AMP Polarized Header (2-Pin, Straight Post) J1,J17
8  575-199314            14 Pin Low Profile IC Socket                U7-U14

ICs

1  782-H11AA1            Optoisolator                                U6
2  511-ST485BN           RS485 Connectors                            U4,U5
8  579-PIC16F688-I/P     PIC16F688, unprogrammed, DIP14, Industrial Temp    U7-14

Oscillator
1 520-TCH1843-X          Oscillator, 18.432 MHz, 5V, 8-DIP           U3

Optional (if per/port LEDs are desired)
64 859-LTL403G           LEDs, Rectangular, Green       
8  71-CSC08A01-680       Resistor Network, 680 Ohm                   R10-13, R20-23
8  299-680-RC            Resistor, 680 Ohm, 1/4W                     R15-18, R24-27

Optional (if unfiltered power is brought in through J4, see note below)

1  625-1N5819-E3         50v 1A Schottkey Diode                      D1
1  511-L4940V            Regulator, LDO, 5V, 1.5A                    U1
1  140-XRL16V1000-RC     1000 uF, 16V Radial-Lead Elect. Cap         C1

The on-board regulator should only be used if measures are taken to keep the current consumption down (omitting the on-board LEDs, and using the non-PWM firmware). If the LEDs are used and the PWM firmware is installed, the current consumption if the board is about 1A, and so the regulator will dissipate too much power (the small value of C1 precludes decreasing the input voltage).

Revision History

 7/21/2007 BOM copied from picdimmer forum, on-board regulator made optional
 7/21/2007 Value of regulator parts (diode, regulator, cap) changed.
 7/21/2007 Value of LED current limit resistors changed.
 7/22/2007 Changed p/n of TYCO/Amp vert. mount connector to ROHS, added note about physical size problem with them.
 7/24/2007 Deleted TYCO/Amp vert. mount jacks, they don't fit.  Use the Molex Jacks instead.
 7/24/2007 Changed value of C2, to agree with datasheet for regulator even at low temperatures.

Errata for Rev XA PCB -

 1) The trace between J4 and D1 is too small, and needs to be beefed up if the board is configured to draw more than 1/2A through J4.
 2) There are two diodes labelled D4.
 3) The holes for D1 are too small.
 4) The silkscreen reference designator for C3 (above U10) is missing.