Scullcom Hobby Electronics #21 - Design & Build 5 Volt Reference Standard

This project is for the hobbyist to design and build a 5 volt precision voltage reference standard that requires no adjustment but still has an accuracy of ±0.01% or better and a temperature coefficient of ±3 ppm/ºC. Also incorporating an auto switch-off and battery monitor feature. PARTS LIST: 1 x Intersil ISL21009BFB850Z, Precision 5V Voltage Reference ±0.5mV 3ppm/ºC. 1 x SOIC8 to DIL8 IC Adapter PCB SMD Converter Board + Pin Headers (find on eBay). 1 x IRF9630 - 'P' Channel MOSFET. 1 x 2N3904 - General NPN transistor. 2 x 5v6 1.3w Zener Diode. 1 x Kingbright 5mm Red/Green LED Tricolour Clear (Manufacturer Part No: L-59EGC). 5 x 1Kohm Resistors (either 1% or 5%). 1 x 10Mohm Resistor (either 1% or 5%). 1 x 10uF 25V Electrolytic Capacitor. 1 x 10uF (16v or 25V) Tantulum Capacitor 1 x 0.1uF Capacitor. 1 x 0.01uF Capacitor. 1 x miniature 6 x 6mm tactile switche with a square button shoulder. 1 x Yellow round button for use with 6 x 6mm tactile switch 1 x Black 4mm Banana Socket 1 x Red 4mm Banana Socket 1 x Project Case, ABS, Aluminium Lid Material, 53mm Length, 83mm Width, 35mm Height, Matrix Board (from Rapid Electronics - Order Code: 30-0650) Cost £1.31. 1 x PP3 Battery Holder with Flying Leads (from Rapid Electronics - Order Code: 18-0163) cost £0.35. Anyone interested can download the front panel template for this project (in PDF format) from the link below: http://www.scullcom.com/Scullcom_5vol... BELOW ARE PCB ARTWORK AND CONSTRUCTION IMAGES http://www.scullcom.com/Scullcom_5v_R... http://www.scullcom.com/Scullcom_5vol...