Circuitrocks

<r>Rebuilding the sumo bot after the loss (other thread). One question I keep going back and forth on: brushed micro motors (cheap, replaceable) vs coreless (more torque per amp, lighter, expensive).<br/>
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Numbers I'm seeing:
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<LI><s>[*]</s>Brushed N20 12V at 300rpm: torque ...

<r>Just back from a regional college sumo competition. Made it to semis pero nag-lose sa nakakahirap na rounds. Sharing what failed kasi maraming useful lessons.<br/>
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<B><s>[b]</s>The bot:<e>[/b]</e></B> 1.5kg, 4-wheel drive, 2x N20 metal-gear motors, IR sensors for opponent detection, IR ...

Late na ako pero hindi pa late: support sa RoboWars sa UP-NCR! Yung circuitrocks parating reliable sponsor for these events. Last year nag-set up din kami ng team, yung sumo arena setup hardcore.

Sino mag-aattend ng coming year edition? Bring na ko ng team.

Attending kami nito! Yung UP Circuit consistently good organizers pa naman. Sino dito sa forum balak attend? Pwede magkita-kita.

Yung last year SQUEEZE, may table na tinatakbo ng circuitrocks din ba? Nag-stop ako sa booth nila for components.

<t>Datasheet ng HC-SR04 sabi 4 meters max range, lab conditions yan I assume. For our outdoor obstacle course (sumo bot territory border detection), kelangan ko ng reliable detection at 2 meters minimum.<br/>
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May nag-test na ba ng HC-SR04 sa real outdoor conditions? Wind, surfaces of different ...

3rd year competing, sumo bots and line followers mostly. Posting late kasi yan yung work hours namin sa robotics lab. Sa veterans dito, daming napupulot. Sa mga junior na kasama ko sa lab, redirect ko sila dito kapag may tanong na hindi ko alam yung sagot.

<r>Confirmed yung decoupling cap fix from competition robotics experience. Niligtas niyan yung line-follower namin last season, yung dalawang MG90s sa front jumitter nonstop, halos sumuko na ako bago ako naglagay ng 220µF + 0.1µF across each servo's power input. Suddenly stable.<br/>
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Isa pang ...

<r>Sa robotics team namin, ESP32 ginagamit for telemetry, 4 hours of continuous bot ops, sends IMU + battery data every 100ms over WiFi. Crash rate near zero, pero kasi maikli yung sessions namin, hindi yan yung deployment scenario na tinatanong mo.<br/>
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For 6-month unattended, things to think ...

<r>Bumubuo ng 1kg sumo bot for inter-college comp soon. Default Arduino <CODE><s>[code]</s>analogWrite()<e>[/code]</e></CODE> runs PWM at around 490Hz on most pins, kaya may audible whine yung motors namin. More importantly, hindi maganda ang ramp-up ng speed.<br/>
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Alam ko kayang i-manipulate ...