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04/23/2024 7:01 PM
Paul Kalb Welcome

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In Memory Of Ginny

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My Final Build....
I am not an electrical engineer. I have no basis for expertise in this area. I am only reporting what I have done and what my results have been.

If you decided to try modifying any electrical appliance, you need to understand that you are assuming the liability for anything you do.

The same applies here. I assume no responsibility for your decisions and actions.

This is what I have done. First, a reference to a video and then some supporting documentation

edit to correct link
Edited by ginny on 10/29/2015 2:58 PM
So many beans; so little time....
Parts used in final Presto PopLite build 10/25/2015

Unless otherwise noted, parts obtained from Amazon and prices include shipping (AmazonPrime)

$17.52 Presto 04820 PopLite Hot Air Popper

$8.75 American Weigh Scales Black Blade Digital Pocket Scale, BL-1KG-BLK 1000 by 0.1 G SELL

$12.99 DROK? Digital Current Voltage Multimeter AC 100-300V 100A Voltage Amperage Meter, AC Volt Amp Testing Gauge Power Monitor LCD Dual Display Voltage

$2.87 Interpower 8301213 IEC 60320 C14 Screw Mount Power Inlet with Quick Disconnects, IEC 60320 C14 Socket Type, Black, 10A/15A Rating, 250VAC Rating

$8.95 CES PLASTIC ENCLOSURE BOX : 3.23" x 8.54" x 5.43"
$4.49 80mm Black Steel Mesh Filter Grill, 2.2mm Hole Diameter
$5.99 ARCTIC F8 TC - 80 mm Standard Low Noise Temperature Controlled Case Fan
$3.90 Gardner Bender 73421 Spiral Wrap, 3/8-Inch in Diameter X 3 1/2-Feet Long, Black

$6.25 AC 15A/250V 20A/125V ON-OFF 2 Position SPST Boat Rocker Switch 10pcs

$16.66 SMAKN? AC 0-220V 20A Pulse Width Modulator PWM Electric Motor Speed Controller Max 4000W
$18.69 Honeywell AT150A1007 Transformer, 120/208/240 volt, with universal mount, foot, plate or knockout.
$4.50 Funnel Ace Hardware in Homeware section

$5.00 SPST Dimmer for incandescent lighting ? Home Depot

$5.90 5 pcs OF L7812CV LM7812 L7812 Voltage Regulator IC + 12V / Integrated Circuit

$6.15 50V 4700uF 105C Aluminum Electrolytic Capacitor Black 25x31mm
============= Other Optional and Spare Parts ==============================================

$66.99 Luxor/H.Wilson 2-3/4-Inch Deep Tub Shelf Utility Cart, Black (STC21-B)
$5.06 10Pcs 250V 10A 240C Celsius Circuit Cut Off Temperature Thermal Fuse

$1.84 10 Pcs Molded Plastic Case 1000V 10A Rectifier Diodes 10A10

$2.29 2 Pcs K Type 800C Wire Lead Measuring Thermocouple Sensor 1M 3.3Ft

$8.99 AODE? K-Type Digital Thermometer + TP-01 Thermocouple Probe Cable 110003

$9.97 Wrenwane Digital Kitchen Timer

and I am going to attach a jpg for the wiring diagram... again.... whatever.....
ChicagoJohn attached the following image:

Edited by ChicagoJohn on 10/29/2015 3:25 PM
So many beans; so little time....
Nice, professional-looking, video! But I could never keep up with the
coffee demand at our house 91 grams at a time. Any plans for a bigger unit?
No oil on my beans...


oldgearhead wrote:

Nice, professional-looking, video! But I could never keep up with the
coffee demand at our house 91 grams at a time. Any plans for a bigger unit?

Thanks for your comments. My first and probably only video. No plans for anything bigger. I only drink two cups a day and the wife makes her own CharBucks Espresso. :)

Thanks again
So many beans; so little time....
Thought I'd post an update. I've been doing up to six consecutive 91 gm roasts at a time with no issues for either the passive chaff collector or the case temperature of the 50VA 24VAC transformer that after rectification to DC, powers the blower motor. It reaches an equilibrium, steady-state temperature of 67C, well below the maximum rated case temperature. This applies to the Honeywell model only; other transformers rated a 50FA may perform (differently.) I'm not seeing any meaningful deterioration in bean motion from roast 1 to roast 6, and no further air clogging problems after installing a 1-layer cheesecloth filter over all air inlets in the base to prevent any stray chaff from entering the blower chamber.
So many beans; so little time....
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