Protoype Build
INTRO
The Prototye Build creates the vehicle that brings the idea to life! This is where much fun, joy, satisfaction (and frustration) can be found. You order parts and assemble the circuit while anticipating how your abstract ideas will play out in the real world.
A prototype using a Solderless Breadboard enables
- functional tests of the design
- hands-on tests of the voltmeter
- easy debug and design modifications
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ARDUINO + ANALOG SCHEMATIC
Here's the schematic of our Digital Voltmeter showing the Solderless Breadboard and connections to the Arduino UNO Board.
ARDUINO + PROTOBOARD
There is no easier way to prototype a circuit than with the Solderless
Protoboards. Drop in a component and begin wiring! Although the breadboard
is limited to lower frequency designs, you can easily test, modify and
experiment with your design.
A handy online drawing program
(www.cirkitstudio.com/) allows you to create a parts-based wiring diagram as
shown below.
Please note, the diagram above is only a suggestion. Arrange parts and wire the circuit anyway you prefer!
PARTS LIST
Even with the most basic components, you can build a working digital voltmeter. Several parts were selected in the design strategy or calculated in the design phase. Feel free to select alternate components for preference / availability / cost.
The critical components required to meet the Accuracy Spec are the 0.1% resistors R1=806k and R2=200k. While a 1% tolerance was chosen initially, the Error Budget Analysis revealed that the 0.1% grade was needed to meet spec!
Qty
(Ref)Description Part Number
(Digikey option)1 Arduino Uno Rev3 Microcontroller Board A000066 1 USB Cable Type A/B any available 1 pkg Adafruit Industries LLC JUMPER WIRE M TO M VARIOUS (1528-2185-ND) 1 SparkFun Electronics COM-00097 Push Button (1568-COM-00097-ND) 1 SparkFun Electronics PRT-12002 Solderless Breadboard (1568-PRT-12002-ND) 2 TEST LEADS GATOR TO GATOR, BLK, RED any available 2
(SW1,2)SSR RELAY SPST-NO 500MA 0-60V TLP592A(F)
(TLP592AF-ND)1
(R1)RES 806K OHM 0.1%, ≥1/10W any available 1
(R2)RES 200K OHM 0.1%, ≥1/10W any available 1
(RP1)RES 200K OHM ≤5%, ≥1/10W any available 1
(CP1)CAP CER 0.15UF ≥50V, ≤10% X7R any available 2
(R3,4)RES 1K OHM ≤5%, ≥1/10W any available
NEXT UP
Perform an essential Bring-Up Test, before applying the power and running the code!
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