The Solectria Sunrise
The Sunrise EV2 Project Homepage
Welcome! We are a group of dedicated electric vehicle enthusiasts whose goal is to create an affordable, high performance electric kit car that anyone of modest skill can assemble. The Sunrise EV2 is a four-passenger pure electric sports sedan, designed to meet all the safety, performance, and comfort requirements of a modern state-of-the-art automobile.
The original Sunrise was designed by Solectria Corp. using the Hypercar principles of Amory Lovins. It achieved remarkable efficiency and range, through the use of lightweight construction, innovative design, and superb aerodynamics. Unfortunately, only a handful were produced.
The Sunrise EV2 project began with the purchase of the last unfinished Sunrise from Solectria CEO James Worden. It is being redesigned as a kit car, along the lines followed by manufacturers of light plane kits for the EAA (Experimental Aircraft Association). The steps are:
Our goal is to make the Sunrise EV2 as modular and open source as possible; like a PC clone, where many different parts can be used, from many different vendors. We'll provide the basic "box". Builders can then use any motor, controller, batteries, charger, interior, and instrumentation they like. Depending on your budget and performance requirements, your Sunrise can be AC or DC, lead-acid or lithium batteries, etc.
We look forward to having a community of Sunrise EV2 builders, where members can exchange ideas, buy/sell/trade parts, and assist others in building their cars. Check this website out occasionally to see how we're doing.
Not much progress this year. Interest in homebuilt EVs really collapsed since the automakers began selling their own EVs. And I've had some financial expenses that have kept me from investing much more than my own time in the project.
It's winter now... but hope springs eternal. Perhaps the new leadership in Washington will mean another collapse in the automaker's interest in EVs, and a return to 2000. Maybe there will be a rebirth of interest from people who want to build their own car; one that they can fix themselves without being beholden to Big Auto or the vagries of the government.
There's nobody left to work on the Sunrise EV2 but Igor and I. But, I broke down and bought a gas furnace for the garage. Hopefully we can make some progress over the winter!
Christmas is a-Comin. Here are a couple great little kits to build for the ones you love, or as a first kit to introduce your young engineer to the amazing world of electronics. They're both easy projects for beginners to build.An Electronic "Christmas Card"
Looking for a unique Christmas "card" to highlight your electronics skill? Need a gift for that electronics hobbyist or budding engineer on your list? How about this electronic Christmas tree kit?
It's a 6" high tree, decorated with colorful blinking lights. It's the perfect beginner's kit, with large parts, big pads, and wide traces for easy soldering (no tiny surface mount parts). The circuit board, detailed instructions, and all parts except battery are included. It runs on a standard 9 volt battery, which doubles as a stand. The clever micropower CMOS circuit operates for weeks. It even works with batteries too dead for anything else (so put your old smoke detector batteries back to work). Best of all, experience the joy of saying, "I made it myself!"
This is the original blinkie-LED Christmas Tree! I've been making them for 30 years now as a special gift for family and friends. I published it in an article in Modern Electronics magazine in 1987, and it's been widely copied (but never equalled) ever since.
The photo shows a personalized greeting that I write on my own trees. If you specify a custom greeting, I'll add it at no extra charge. Or, let me know if you prefer it blank, so you can add your own greeting.
Tools needed: Wire cutters, a small screwdriver, solder, and a soldering iron or gun. US orders will be shipped by US First Class Priority Mail. For international orders, ask about shipping costs. Satisfaction guaranteed or your money back!
If you've never built anything with a microcomputer, here's your chance. This project will show you just how simple a microcomputer can get. It may also be the silliest use for a microcomputer yet! The photo shows it with a holiday hat sitting under the Christmas tree.
I designed this back in 1978 to randomly blink a set of LEDs with the classic RCA 1802 microprocessor. I realized I could arrange the LEDs to form a face. The eyes roll left and right, and blink. The eyebrows raise and lower, and the mouth smiles, frowns, opens, and closes.
How does it work? The LEDs are connected to the microprocessor's address, read/write, and state code lines. The program... well, there is no program! The 1802 has no internal memory (no RAM and no ROM). The data bus is left floating, so it fetches random values, and executes them as if they are a "program". One of the data lines is pulled high; this prevents the data bus from ever being 00, which is the HALT instruction.
The 1802 is being clocked at 1 Hz, so the expressions slowly change. Note that this is not MHz or GHz; 1 Hz is one cycle per second! Let's see you find another microcomputer application that runs this slowly.
The Face Card is available as a complete kit, a bare board, or click here to download the manual in PDF format, complete with schematics and parts list. The kit comes with the 36 red, yellow, and green LEDs, the 1802 microprocessor, and everything else that goes on the board. All parts are thru-hole (no surface mount), and all pads and spacings are large and well spaced for easy soldering. Add a 4-6 volt power source (four AAA batteries, for example), and you're finished!
The board measures 3.5" by 2" (9mm x 5.4mm) and fits perfectly in an Altoids candy tin, with room for a 4-cell AAA battery holder for power. Use a pushbutton switch to turn it on when you open the lid, and surprise your friends when they reach for a mint. :-)
In this section, I'll (irregularly) post EV tips and techniques to save you money, find parts, measure performance, and improve your EV. As new ones appear, the old ones will move to the Lee's EVs page. Purchases contribute to the Sunrise EV2 Project. If you like what you see and want me to write more of them, please click the "donate" button below. :-)
If you work with EVs, you need a way to test batteries. I've used all sorts of setups over the years, ranging from jury-rigged parts from my junkbox to sophisticated systems like my Battery Balancer. There are also commercial products, ranging from cheap junk for testing hobby R/C batteries to very expensive professional-grade systems.
I think the most useful ones have been my home-made load testers. They are simple enough to be cheap and easy to build. They are rugged enough to handle high current for long periods of time. Best of all, I know what they are doing, so I know what the test results mean. I've described them before on the EV Discussion List, but here's a more complete description in case you'd like to build your own.
A "load tester" basically consists of the following:
Here's an example: The tester pictured at the right was built in the discarded case from an inexpensive 120vac 1500 watt heater. The case was gutted, and nothing was kept but the fan switch. I installed a 12vdc muffin fan in place of the original 120vac fan. A large aluminum extruded heatsink was mounted in front of the fan. A big 40 amp automotive relay switches the load (the little Fan switch would die trying to switch high current DC). The load was made from a couple dozen surplus 25 watt power resistors in anodized aluminum cases, screwed to the heatsink for cooling. These resistors are wired to the FAN switch so I can select the load current. The FAN switch had 5 positions; Off, Fan, Low, Med, and High. I wired these positions to the resistors to provide the following loads for a 12v battery:
The left picture is the view inside. The heatsink with all the resistors is in the middle. A 4.7" square 12vdc fan is hidden behind it. The CHARGE and DISCHARGE buttons are at the top, and the FAN switch to set the load current is on the top right. The relay is the black box at the right, with a 30 amp circuit breaker just below it in case anything goes wrong.
Voltage is sensed by a modified Manzanita Micro "Rudman Regulator" (barely visible at the bottom of the case). These are normally used to balance or equalize 12v lead-acid batteries. It switches a 7.5 ohm load resistor across the battery if it exceeds a "fully charged" voltage set by a trimpot (i.e. 14.8v). It switches off when the voltage drops about 50 millivolts from this. I modified an old "rev.A" Rudman Regulator to make its turn-off adjustable with a trimpot to a "fully discharged" voltage (i.e. 10.5v). I also added a pair of pushbuttons to manually switch it ON and OFF. The modifications are very simple; only few parts are added.
The relay coil is wired to the regulator's external load terminals. The regulator's 7.5 ohm load resistor was removed (they tend to burn up). The relay contacts switch the battery between the charger and the load resistors. In operation, the regulator switches the battery to the charger until it reaches the "fully charged" voltage; then to the load until it reaches the "fully discharged" voltage; and then repeats.
____/\/\/\____________________________________ | R27 | D4 R25 | | 1K | 1N270 100K | O |__|/|___/\/\/\__ O / S2 | |\| ^ S3 / O DISCHARGE | | CHARGE O ___|___________________|___________|___________ | |J1 | | o ___ J2 | | | |_| | R5 || R2| |_|__| | | | 1meg ||___| | | |POS LP1 |___________o NEG| | (removed) | | EXT LOAD | | J3 J4 | | POS _| |_ Rudman Regulator | |_______________|_|___|_|_______________________| | | D5 |__|/|__| 1N4001 | |\| | | | |_|_|_|_| K1 Potter & Brumfield VF4-45F11 12vdc coil, 40/30a SPDT contacts
Adjustment: The original trimpot on the Rudman Regulator, R2, works as before. It adjusts the voltage at which the regulator turns on (the high, or fully-charged voltage). New trimpot R25 adjusts the voltage at which the regulator turns off (the low, or fully-discharged voltage). The range of adjustment are as follows (based on my unit):
Turn-On Voltage Turn-Off Voltage R2 at --> min center max min center max ------ ------ ------ ------ ------ ------ R25: min 13.38v 14.22v 15.45v 9.85v 9.87v 10.00v center 13.38v 14.22v 15.45v 12.88v 13.45v 14.41v max 13.39v 14.22v 15.46v 13.13v 13.76v 14.82v
Instrumentation: I used a Cruising Equipment / Heart Interface / Xantrex "E-meter" with RS-232 port, and an old XT PC computer for data logging. A digital multimeter with RS-232 port could serve as well. I wrote a QuickBASIC program to display, print, and save the data to disk. I built this setup over 20 years ago, and still use it regularly!
Click here for my QuickBASIC program to print, graph, and log data from the E-meter / Link-10.
Operation: Connect a battery, and a charger. Set up the computer to log the data (or use a clipboard, pencil, clock, and meter). Set the FAN switch for the desired discharge current. Press the CHARGE button. The Rudman regulator thinks the battery has fallen below its lower limit, and turns off. This drops out the relay, which in turn connects the charger to the battery.
The charger charges the battery. When the battery reaches 14.8v (or whatever you set with the original trimpot on the board), the regulator turns on. This pulls in the relay, whose contacts disconnect the charger and connect the load resistors.
The load resistors discharge the battery. When the battery reaches 10.5v (or whatever you set with the new trimpot), the regulator turns off. The relay drops out, which disconnects the load and connects the charger.
The charge-discharge cycle repeats continuously. Or, turn off the FAN switch while charging to end the current cycle with the battery fully charged. Or turn off the charger while discharging to end with the battery fully discharged.
Electric Vehicles in the News
Donations for the Sunrise EV2 Project
Interested? Want to get involved? There are several ways you can help.
Contact us: Questions or comments? Corrections or problems with this web site? Contact Lee A. Hart by phone at (320) 656-9574, by email, or by mail at 814 8th Ave N, Sartell MN 56377-2240.
Design: Producing the best possible EV requires the best possible minds. The Sunrise EV2 development team has over 100 years of combined EV experience, but we are still learning and improving as we go. If you have ideas for improvements, can help with vehicle design, construction, or testing; or have skills you think we can use, please contact us!
Labor: The Sunrise EV2 prototype is being assembled at our shop in Sartell MN. At present, we are building our prototype composite body and the molds to produce it. It's very labor intensive, so if you're in the area and have some time, please contact us about a visit. See and help build the prototype, and in the process learn how to build your own Sunrise EV2.
Components: Most of the parts and materials to build the Sunrise are being donated by our development team or interested individuals. Our motor, controller, and innumerable tools and shop time have been provided, but there is alway more. Do you have any EV related parts that could be of use? Contact us and see!
Donations: Developing a car is an expensive project. The project is entirely funded by our development team and donations from interested individuals and businesses. Donations will be credited toward future purchases of Sunrise EV2 products. Contributors are also given special attention by members of the EV2 team! Send donations to the Sunrise EV2 Project c/o Lee A. Hart at the above address. To contribute using Mastercard Visa or Paypal, use the "Donate" button below. Every penny helps!
The Sunrise EV2 Project, copyright 2007-2016 by Lee A. Hart.
Website created 2/4/2008 by admin. Last update 11/23/2016 by Lee A. Hart
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