DT101 PicStic Equivalent on a SimmStick Platform.
Supports all the items you need to build a PicStic equivalent on a SimmStick Platform, and all on a 1.05" by 3.5" Double Sided Plated Through Solder Masked Silk Screened 1.26mm thick Printed circuit Board. It has provision for a Communications Port using a Max-232, optional Brown-out circuit, Real Time clock using a DS-1202/1302 or Panasonic NJU-6355, an A to D converter which supports most of the popular 8 pin devices including the LTC1298 12 bit A/D to the National ACD0831 8 bit, and a serial 24LCxx type EEPROM. This means it will cater for the FED Interpreter Basic and the microEngineering Labs PicBasic compiler as it supports any 18 pin PIC16Cxx Micro.
I think the only things it doesn't have that the original PIC001 has, is the 93LCxx
type EEPROMs, cheap comms, and larger proto area. This means it can't be used for the
original Basic Stamp 1 Interpreter.
Users who want to access an EEPROM on the DT101 PCB's using the MEL compiler need to edit the PIC.PBL file to reverse the Pin allocation for the I2C function (SDA & SDL). from Wolf Maier SCORPIA DESIGN 4-Sep-98
All of the documentation for the DT101 board is now on this page.
1 by DT101 PCB
1 by 780L5 +5 Voltage regulator in TO-92 case. (Optional) 1 by Capacitor C1 .01uf (or .1uf) Ceramic 1 by Capacitor C2 .01uf (or .1uf) Ceramic 1 by Capacitor C3 15pf to 22pf Ceramic (Install only if Crystal is installed) 1 by Capacitor C4 15pf to 22pf Ceramic (Install only if Crystal is installed) 1 by Resistor R1 10K .25 watt 1 by Resistor R2 10K .25 watt 1 by Resistor R3 10K .25 watt 1 by Resistor R4 10K .25 watt (Install only if EEPROM is installed) 1 by Resistor R5 10K .25 watt (Install only if EEPROM is installed)
And either a Crystal of a suitable value, or a 3 pin Resonator. If a crystal is fitted then C3 and C4 must be installed. If you use a Resonator, then you must not install these two caps.
The most common crystal used for beginners is 4Mhz, as this matches in with the PIC16C84/04/P that most people start with.
Serial Communications: 1 by Capacitor C5 1uf Electrolytic (PCB mount.) or Tant. @16 V. 1 by Capacitor C6 1uf Electrolytic (PCB mount.) or Tant. @16 V. 1 by Capacitor C7 1uf Electrolytic (PCB mount.) or Tant. @16 V. 1 by Capacitor C8 1uf Electrolytic (PCB mount.) or Tant. @16 V. 1 by MAX-232 E2 (or equivalent)
It may also pay to install a 16 pin socket for the Max-232, as you may have to remove it for some configurations.
Real Time Clock:
Analog to Digital:
Sample code for both the NJU-6355 RTC and LTC-1298 A/D can be found at Micromint's PicStic(TM) site at http://www.micromint.com/modules.htm This has Circuits, Overlays, Code, Data Sheets for the 1, 2, and 3 PicStic. Beware, they keep changing this site to different URL's.
By just simply ignoring the brown-out circuit and installing resistors R1 and R2, the
circuit operation should be fine.
If you wish to use the brown-out circuit, it's just added to the board,
and can be either a CMOS or Open Collector type.
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