PicoBricks Demo Code from Jeff Geerling's Jun 2025 Microcontroller video

00 README.md

PicoBricks Microcontroller Demos

These .pb (PicoBricks) IDE files are meant to be used with a PicoBricks board. I demonstrate how they all work (and how I built them) in this YouTube video:

https://www.youtube.com/watch?v=Sd42q3OaOrE

How to use these files

These files are meant to be opened in the PicoBricks BricksIDE, available on http://ide.picobricks.com

Save one of these .pb files to your computer. Then in the BricksIDE editor, choose File > Open Project, and then choose the .pb file.

Make sure you're connected to the PicoBricks board, and then click 'Run' to run the program.

01 Hello-World-LED.pb

<xml xmlns="https://developers.google.com/blockly/xml"><block type="Robotistan_Start" id="E+:#PXz(d[xy9Ftw(2;a" x="410" y="70"><next><block type="control_forever" id="pkoglQ)$LhkPwPFOURvB"><statement name="DO"><block type="clearScreen" id="T}GLYUn#)5uH/R|K=K*L"><next><block type="writeTextScreen" id="}mIkm!$)5cGd=;=k=t)`"><value name="XPos"><shadow type="math_positive_number" id=".#xV[it_d/2F{)`Bngu:"><field name="NUM">18</field></shadow></value><value name="YPos"><shadow type="math_positive_number" id="br.}uC$S703JTsF0,nt7"><field name="NUM">30</field></shadow></value><value name="WriteValue"><shadow type="text" id="2[YX5{avsrpKRHsf9wZP"><field name="TEXT">Hello world!</field></shadow></value><next><block type="showScreen" id="}Pkr^rco(N455-t@-4+N"><next><block type="control_repeat" id="=D8@EXvg$]H,mjtT8Tuc"><value name="TIMES"><shadow type="math_number" id="a$*sT^+v83bFp(a~wz!h"><field name="NUM">10</field></shadow></value><statement name="DO"><block type="setLedValue" id="gMhYL|Fp=Nr)x0n~)eYo"><field name="VALUE">1</field><next><block type="control_wait" id="wmNS}$VS55wD;{em}!{/"><value name="DURATION"><shadow type="math_number" id="/xalSB5.v=c@i1-NG~{l"><field name="NUM">1</field></shadow></value><next><block type="setLedValue" id="UjkuH+]KOifoZkK1#/Ak"><field name="VALUE">0</field><next><block type="control_wait" id="K6CVaW(:[email protected]!B"><value name="DURATION"><shadow type="math_number" id="G{5X8]AXH^(h8Dp2F]_M"><field name="NUM">1</field></shadow></value></block></next></block></next></block></next></block></statement></block></next></block></next></block></next></block></statement></block></next></block></xml>

03 Dusk-to-Dawn-Simple.pb

<xml xmlns="https://developers.google.com/blockly/xml"><block type="Robotistan_Start" id="lN%3dIj;?1G:@Y5Z!v5#" x="430" y="50"><next><block type="control_forever" id="9%8wdK$}i)%(DNeB#gxp"><statement name="DO"><block type="print" id="Rwu)(sgj@i-RC^qkf@B:"><value name="WriteValue"><shadow type="text" id="Jb?|6~ODcA43$xV7t$Nz"><field name="TEXT"/></shadow><block type="readLightSersor" id="Pw0Kt6Jx94^j}z0d.Al9"/></value><next><block type="controls_if" id="2(hu+}Z^vjaW|%seR`+="><mutation xmlns="http://www.w3.org/1999/xhtml" else="1"></mutation><value name="IF0"><block type="logic_compare" id="X=_H49?}/Oi0}Bamr4Cf"><field name="OP">GT</field><value name="A"><block type="readLightSersor" id="fy%KiCbSKAM97U{:`qVm"/></value><value name="B"><block type="math_number" id="/cELddCmXne%N!jaqiBc"><field name="NUM">2000</field></block></value></block></value><statement name="DO0"><block type="neoPixelColour" id="|g4C~t15QS;EyA3i8$`O"><value name="ColourValue"><shadow xmlns="http://www.w3.org/1999/xhtml" type="colour_picker"><field name="COLOUR">#ffffff</field></shadow><block type="colour_picker" id="[dDB1`T,KOkaYFyJUPfR"><field name="COLOUR">#ffffff</field></block></value></block></statement><statement name="ELSE"><block type="neoPixelColour" id="EqU.DTyvNGQdqsv@^qZe"><value name="ColourValue"><shadow xmlns="http://www.w3.org/1999/xhtml" type="colour_picker"><field name="COLOUR">#ffffff</field></shadow><block type="colour_picker" id="mN`Oe|j8c`Q?@W~fG?a3"><field name="COLOUR">#000000</field></block></value></block></statement><next><block type="control_wait" id="~[JxjRk{9)0ps[M9iQHX"><value name="DURATION"><shadow type="math_number" id="$=-@ISwzVAna~0%e-+8%"><field name="NUM">0.1</field></shadow></value></block></next></block></next></block></statement></block></next></block></xml>

04 Dusk-to-Dawn-Math.pb

<xml xmlns="https://developers.google.com/blockly/xml"><variables><variable id="w[nv8|(yI4`8t)K/^p4h">light_percentage</variable></variables><block type="procedures_defnoreturn" id="|Sj}mVe4fl$Xw3rmtkeX" x="950" y="50"><field name="NAME">get_light_percentage</field><statement name="STACK"><block type="print" id="re,[|5I2aFM@ZCPMx(5:"><value name="WriteValue"><shadow type="text"><field name="TEXT">PicoBricks</field></shadow><block type="readLightSersor" id="d`k*[*Cg6Y`KP-e$T@2f"/></value><next><block type="variables_set" id="q-mB2~13(sb{AFt6?[nN"><field name="VAR" id="w[nv8|(yI4`8t)K/^p4h">light_percentage</field><value name="VALUE"><block type="math_round" id="~*9iV#=fG.I1)J{}o]Sf"><field name="OP">ROUND</field><value name="NUM"><shadow type="math_number" id=".WxoEyweT^9+SwhP8?GA"><field name="NUM">3.1</field></shadow><block type="math_arithmetic" id="}UhA2$/SBIj1{xgeaC,T"><field name="OP">MULTIPLY</field><value name="A"><shadow type="math_number" id="W?_8uBx6u$jJ+_:Byw^*"><field name="NUM">1</field></shadow><block type="math_arithmetic" id="?u6+Gzk2EqDm+Bb=SeEv"><field name="OP">DIVIDE</field><value name="A"><shadow type="math_number" id="Jm|H`-s~p[H)])PKW}i."><field name="NUM">1</field></shadow><block type="readLightSersor" id="2JuP,V{pkkSCdV!Vq99B"/></value><value name="B"><shadow type="math_number" id="4.BOhd^#%z)xs%Pwc@;@"><field name="NUM">14000</field></shadow></value></block></value><value name="B"><shadow type="math_number" id="sj4+Q.%QA9zJsxD*vWHP"><field name="NUM">100</field></shadow></value></block></value></block></value><next><block type="print" id="j|t3S~%{]7zx%d?n1[zJ"><value name="WriteValue"><shadow type="text" id="daB8MN6,Nkj5/nH}kG]N"><field name="TEXT">PicoBricks</field></shadow><block type="variables_get" id="4ZaCooTyJ14~c*!xiw}#"><field name="VAR" id="w[nv8|(yI4`8t)K/^p4h">light_percentage</field></block></value></block></next></block></next></block></statement></block><block type="Robotistan_Start" id=".UWLZ;6DG_:nYc~g@W!$" x="438" y="87"><next><block type="control_forever" id="(+*jP(3K)uHv|vZkp/CH"><statement name="DO"><block type="clearScreen" id="XD^o_h@`=~87p$=Jo+tn"><next><block type="procedures_callnoreturn" id=")s0y)6fcxlo/6rbpRRvo"><mutation name="get_light_percentage"/><next><block type="writeTextScreen" id="hh?lKI4qZzillB9ylNJC"><value name="XPos"><shadow type="math_positive_number" id="jX4OFd;F,*8()?f8RM5T"><field name="NUM">5</field></shadow></value><value name="YPos"><shadow type="math_positive_number" id="$un!Q~r=Ttis|zU`sF]7"><field name="NUM">5</field></shadow></value><value name="WriteValue"><shadow type="text" id="Qh92m_?nhHw$?w/rO_lC"><field name="TEXT">Light Level</field></shadow></value><next><block type="writeTextScreen" id="$KJnqp9F8GVr_FTFFh?M"><value name="XPos"><shadow type="math_positive_number" id="x2Mm(uJJGvm6uTC9N0C-"><field name="NUM">5</field></shadow></value><value name="YPos"><shadow type="math_positive_number" id="Q@][email protected]]yM(c35Tty,"><field name="NUM">15</field></shadow></value><value name="WriteValue"><shadow type="text" id="Zsric8[T^WQIz-!O3RmZ"><field name="TEXT">PicoBricks</field></shadow><block type="list_combined" id="|yPav*`:rCRl2kiJy[Sw"><value name="STR1"><shadow type="text" id="^ijk~r$ub!3I^X[LH@|)"><field name="TEXT">Pico</field></shadow><block type="variables_get" id="y9}9SG/a#s?X+?:pVTC%"><field name="VAR" id="w[nv8|(yI4`8t)K/^p4h">light_percentage</field></block></value><value name="STR2"><shadow type="text" id="gov*uXBSq4,U9lr5hHpz"><field name="TEXT">% darkness</field></shadow></value></block></value><next><block type="showScreen" id="dF#kn;.V;][E4y,{St$D"><next><block type="controls_if" id="[eIO:PysfjY]%tC-,tSv"><mutation xmlns="http://www.w3.org/1999/xhtml" else="1"></mutation><value name="IF0"><block type="logic_compare" id="?oS/dRk;D$$`4,!}!AIZ"><field name="OP">GT</field><value name="A"><block type="variables_get" id="5ql3;q_f^:Rb[9egs-|e"><field name="VAR" id="w[nv8|(yI4`8t)K/^p4h">light_percentage</field></block></value><value name="B"><block type="math_number" id="-mVK~re_|a8bY|748$yh"><field name="NUM">30</field></block></value></block></value><statement name="DO0"><block type="neoPixelColour" id="@2e!U;T,WR$4X_s*T#AO"><value name="ColourValue"><shadow xmlns="http://www.w3.org/1999/xhtml" type="colour_picker"><field name="COLOUR">#ffffff</field></shadow><block type="colour_picker" id=":jPavO)]#L8@zMqqHuY,"><field name="COLOUR">#cccccc</field></block></value></block></statement><statement name="ELSE"><block type="neoPixelClear" id=":[lsE3v;bR1:{@czw|9V"><next><block type="setLedValue" id="btUd()N8jC`X(/0G.V)|"><field name="VALUE">1</field></block></next></block></statement><next><block type="control_wait" id="T%*{QAxO#sWiqUj^STaO"><value name="DURATION"><shadow type="math_number" id="=rC(3)]*t4l?^ZnEDW/="><field name="NUM">0.1</field></shadow></value></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></next></block></xml>

07 Relay-IR-Remote.pb

<xml xmlns="https://developers.google.com/blockly/xml"><variables><variable id="w[nv8|(yI4`8t)K/^p4h">light_percentage</variable><variable id="[+jMUTz[~VxgMEYU,At.">color_level</variable><variable id="MuC[otIWlVBWMoF$3Cme">armed</variable></variables><block type="Robotistan_Start" id="QZJqx8QQ%pH3k9nJj3H4" x="-230" y="-90"><next><block type="while_loop" id="2KQ?7@t}SPJT[UWnhC@-"><value name="WHILE"><block type="logic_compare" id="gzd,9}uM?CA}`,qao%2I"><field name="OP">EQ</field><value name="A"><block type="readButton" id="OWgg1%6Y:Yuj~sQUA2d-"/></value><value name="B"><block type="math_number" id="%!JQhZAL`6F$ULTW2wsz"><field name="NUM">0</field></block></value></block></value><statement name="DO"><block type="procedures_callnoreturn" id="uZ$2]-l%O64MgO=24^;t"><mutation name="arm_message"/></block></statement><next><block type="control_wait" id="qj$;1C@z=jd4I4uSuv@H"><value name="DURATION"><shadow type="math_number" id="$wg+R|W)^KUL(0;Ul@V#"><field name="NUM">0.1</field></shadow></value><next><block type="control_forever" id="UG?+@azU`yB+8A-)!Ct|"><statement name="DO"><block type="while_loop" id="A2OQnCz[*X$Ck,]`Yi3e"><value name="WHILE"><block type="variables_get" id="w}H^A|4Qe%J$7)yVk5AI"><field name="VAR" id="MuC[otIWlVBWMoF$3Cme">armed</field></block></value><statement name="DO"><block type="clearScreen" id="j-n/TC3S(Z6m2Ud%IHpr"><next><block type="writeTextScreen" id="sFHiI=#sB{1A4%gmgL7."><value name="XPos"><shadow type="math_positive_number" id="mo$?(=[4%(B-.f#vs#~I"><field name="NUM">28</field></shadow></value><value name="YPos"><shadow type="math_positive_number" id="F|ldD{#~;2k._:{i|==F"><field name="NUM">10</field></shadow></value><value name="WriteValue"><shadow type="text" id="?q5f5mXLQ4l*4/QB6en`"><field name="TEXT">Pop a Cap</field></shadow></value><next><block type="writeTextScreen" id="4{JXsUFt;_MZM:NKf[of"><value name="XPos"><shadow type="math_positive_number" id="C1j$pu_?@jMqQkSiZ?(["><field 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type="math_positive_number" id="tAtY$9XXl2ZxA$@TO_mJ"><field name="NUM">45</field></shadow></value><value name="WriteValue"><shadow type="text" id="RIYy~nk!EZ4:`%WOJ]@="><field name="TEXT">to Arm</field></shadow></value><next><block type="showScreen" id="[email protected]?i@^%;=j3~"><next><block type="neoPixelColour" id="I(j];C?Y8nnvKQq^t/#@"><value name="ColourValue"><shadow xmlns="http://www.w3.org/1999/xhtml" type="colour_picker"><field name="COLOUR">#ffffff</field></shadow><block type="colour_picker" id="3-gvrM9b!#p|Gw$~noTo"><field name="COLOUR">#000000</field></block></value><next><block type="setLedValue" id="MTU)sp:I$-,7RwxVU*;k"><field name="VALUE">0</field><next><block type="controls_if" id="x|,d{Y;g(I5RI8]z[~hX"><value name="IF0"><block type="readButton" id="!%R^$Ex)=DYm|JpZ5{(T"/></value><statement name="DO0"><block type="variables_set" id="OpD-z^+kG;!|YCv#oD/R"><field name="VAR" id="MuC[otIWlVBWMoF$3Cme">armed</field><value name="VALUE"><block type="math_number" id="wczAVS}{`d]YSoz@URKr"><field name="NUM">1</field></block></value></block></statement></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block><block type="procedures_defnoreturn" id="H6jX$JQGRzB5O[|jz~!h" x="350" y="490"><field name="NAME">pop_cap</field><statement name="STACK"><block type="print" id="+.UGDI28?cBmKV_drw[i"><value name="WriteValue"><shadow type="text" id="P9FhF$CR!Cx](|Bcr=/["><field name="TEXT">POPPING CAP NOW</field></shadow></value><next><block type="setLedValue" id="QrABqJm5+gcnQ_]}`t(!"><field name="VALUE">0</field><next><block type="neoPixelColour" id="$!w:025LnYbxieGrtJ${"><value name="ColourValue"><shadow xmlns="http://www.w3.org/1999/xhtml" type="colour_picker"><field name="COLOUR">#ffffff</field></shadow><block type="colour_picker" id="kS9QmS.%6_wnZI.G~bmC"><field name="COLOUR">#ff0000</field></block></value><next><block type="clearScreen" id="MTVk1!7%i=VRb)vv3.U@"><next><block type="writeTextScreen" id="_GKt!f4eo{O:psOH;wOZ"><value name="XPos"><shadow type="math_positive_number" id="a3o`46^!9,,t7Vn)iN+["><field name="NUM">28</field></shadow></value><value name="YPos"><shadow type="math_positive_number" id="mN]TkJ]mT:Ef;`vKa1TS"><field name="NUM">10</field></shadow></value><value name="WriteValue"><shadow type="text" id="Tgdv,!oYhDI|5:9gJA9y"><field name="TEXT">Pop a Cap</field></shadow></value><next><block type="writeTextScreen" id="x7.*c*s9Va=9l`$bq!a{"><value name="XPos"><shadow type="math_positive_number" id="1y6u?f~1Bx*Cjn2fpU5C"><field name="NUM">42</field></shadow></value><value name="YPos"><shadow type="math_positive_number" id="QK51h!pX[OvApt=|q*[|"><field name="NUM">40</field></shadow></value><value name="WriteValue"><shadow type="text" id="[YcM06uX[vxHWQ6USU*Y"><field name="TEXT">BOOM!</field></shadow></value><next><block type="showScreen" id="k2J`@]jn!ZG(I3VBTBB*"><next><block type="setRelayValue" id="@9^CD!#G%PyOM?(Fo(wf"><field name="VALUE">1</field><next><block type="control_wait" id="(UfwEif7@k^mzFB2(}kF"><value name="DURATION"><shadow type="math_number" id=".ed.^x.)Xl%UMud2`*)n"><field name="NUM">3</field></shadow></value><next><block type="setRelayValue" id=")e{y]M#zR|wcDhKp0:q@"><field name="VALUE">0</field><next><block type="variables_set" id="%Nb[I03{au1y~VM6t4[n"><field name="VAR" id="MuC[otIWlVBWMoF$3Cme">armed</field><value name="VALUE"><block type="math_number" id="E4~XKNW9n9a`lwctCZTD"><field name="NUM">0</field></block></value></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></next></block></statement></block></xml>

Hi Jeff, the video was excellent. Thank you for the code. I have been making changes as I learn and find using the PicoBricks as an awesome way to learn to use some of the great products and projects.

Glad I could help!