5V to 1.5V Converter for Wall Clock
ฝัง
- เผยแพร่เมื่อ 28 ก.ย. 2024
- This circuit is very simple and can be used to run any wall clock for years.
This circuit has many other applications where 5 volts to 1.5 volts conversion is needed such as in toys etc.
The Schematic includes only three main components
BC547 Transistor & two 10K Resistors
A 18650 Battery is required to run the circuit or any source can be used such as a 5V charger. This circuit has a tendency to tolerate 12V input and convert it into 1.5 volts easily.
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The title should be 3.7V to 1.5V for wall clock not 5V which is using USB power input. Its clearly mislead.
4.2-3.7V
Yyyi
Тоже самое делал, но применяя спец. стабилизатор SMD. И лучше было бы крепить снизу, а не сбоку, т.к. противовес будет не верный.
In your first ad 5 volt in put but you are showing in video 3.7 v battery. Please let me tell about what is correct
😅😂
If we need to recharge battery frequently, there is no difference between AA cell and this mod.
power loss kitna hai..
Cześć! Mogę powiedzieć że realizujesz mój pomysł ☺️ ponieważ ja stosuję go już od wielu lat.
Początkowo też stosowałem dzielnik napięcia, ale później zastosowałem 3 lub4 diody (np. 1N4148) w szereg z zasilaniem zegara - należy dobrać doświadczalnie.
Зачем городить огород если есть специальный стабилизатор 6206а с выходом 1,5 вольт,причем с очень низким потреблением.Входное напряжение от 3-х до 6 вольт,подходит как раз для переделки часов на литиевый аккум.А в данном случае транзистор много потребляет
Thank you very much for the video!
You r welcome
E se a gente coloca uma pilha de 1,5 V e mede com um microamperímetro o consumo e depois coloca uma resistencia que com 5V deixe passar a mesma amperagem se evita toda essa construção.
né, tem tanta forma de fazer sem precisar usar um transistor.
@@Hudsonkem um zener de 3.5v em serie?
@@carlosceschini4104 não daria certo, o zener é um estabilizador de tensão por assim dizer, vc precisar fazer um divisor de tensão só que ao invez de dois resistores você vai usar um resistor em seria com a carga ao mesmo tempo que o zener vai esta em paralelo com a mesma carga. vc pode usar aqueles calculos simples de resistor para LED, vou chutar um valor de 100k Ohms por exemplo. (5v-1.5v)/0.00005A=70000 ohms. se o consumo do relogio for em torno de 50µA ou seja, um resistor de no minimo 70k ohms em serie.
@@Hudsonkem
Os 5V da fonte menos a tensão de zener de 3.5 V teremos os 1.5V que precisamos para alimentar o relógio independente da sua carga que atuará como uma resistência em série fechando o circuito.
O consumo do relógio é ridículo pena que disciparemos uma potência de
3.5V × i (r) = Wz em calor.
Сделал такую схему. Да напряжение соответствует, но почему то ток потребления механизмом часов на Li-ion вырос в двое и часы стали убегать за 8 часов на 30 секунд. Это много. Пришел к выводу что все эти схемы и танцы с бубном - просто убийство времени. Если механизм дерьмо, то его нужно просто выкидывать. Нормальный механизм потребляет в районе 12 mA. Есть Российский производитель таких механизмов их теперь и покупаю.
Output current?
Can anybody explain me why clocks like these start to go forward or backward? I have one that used to go back, then went OK and lately goes forward???? Does temperature or humidity has anything to do with that?
Don’t know about a battery clock but a mains clock can go backwards as they have a start up capacitor that kicks the motor into life. If you turn it on at a certain point in the mains cycle then it can be kicked in the wrong direction mains clocks use an AC motor.
@@DavidCase-ov5uo By "goes backward" I mean it stays back in time.. not that that the hands go counterclock...
If it can take 5v and output 1.5v then better ditch the battery altogether already and use 5v usb charger for infinite power.
Mostra 5Volts mas faz uso de apenas 3,7 V consequentemente ao fazer uso de 5Volts esta tensão de saída será maior que os 1,5V mostrado, caso ainda queira fazer o circuito, utilize um LM317, mais estável e confiável e poderá fazer uso normalmente dos 5 à 9 volts sem alterar a saída em nada. Boa sorte
Пользуюсь более простой схемой: один кондей и один резюк. Недавно выяснил, что разные механизмы могут иметь разные потребности. Поэтому сначала вместо резюка впендюриваю потенц и определяю какого хрена ему надо. И только потом впендюриваю именно нужный по размеру резюковый хрен.
I never buy bc547 for FM transmiter homemade, and i like
is it a wall clock? so wire it to mains!
Perfecto , la salida es 1,48 v ; pero la entrada nunca la mediste .
Какая глупость, купи аккумулятор по типу используемой батарейки в ЧАСАХ и зарядное к нему. И ни каких проблем, а с этой байдой надо ещё баланс подобрать так чтоб часы ровно висели.
Этой байдой занимаются не от хорошей жизни. Пошли такие механизмы где батарейка с напряжением в 1.2 вольта и с не плохой токоотдачей часы уже не тянут. На новой батарейке часы идут меньше месяца. Аккумулятор не спасает Там номинальное напряжение 1.2 вольта. Раньше обычная солевая батарейка служила -1-1.5 года. Сейчас месяц и меньше. Разница есть?
@@ВенерХасанов-э6о так в чём проблема найди китайские часы сними механизм и поставь туда, а часы с проводами и прилюдно не камельфо
5 V to 1.5 V ? better to correct the title to : 3.7 V to 1.5 V !
And serial 3 diodes 1N4007? It works too and it is more simple to built isn't it?
How?
yes with capacitor
@@tijitwar7071 Battery 18650 is 3.7V. Each diode 1N4007 drops voltage by 0.7V. Thus, resulting 3.7V - 3 * 0.7V = 1.6V.
The battery should use 1S BMS battery protection to avoid over discharge.
5-0.7-0.7-0.7=2.9V
2.9=1.5 ?
The issue is to build an efficient circuit, the shown circuit is not, nor using diodes.
The sooner TH-cam bring back the thumbs down count the better so rubbish like this does not get recommended will make TH-cam a useful site again.
Circuit analysis:
SIMPLE ......... nothing more than a emitter follower voltage divider which does not do what the creator claims.
Calculate: Output Voltage = ( R1 / (R1 + R2)) X Vin - Vbe drop of transistor.
3.7 Volt input = approx 1.3 Volt output (dependent on load current draw)
5 Volt input = Approx 2 V output (dependent on load current draw)
12 Volt input = Approx 5.5 V output (dependent on load current draw)
If a creator does not explain their circuit or verify with calculations they have no idea about what they are talking about. Not even a multimeter to proove output voltage !
The Firefox AddOn "Return TH-cam Dislike" brings back thumbs down. They do still exist, the display in your browser is just supressed. Btw, for the price of one average 18650 I get 10-15 standard AA batteries in my local supermarket. This is sufficient to run the clock for around 20 years in theory. Without any botched job. I hope the 18650 also will run for about 20 years until the first recharge is needed... 🙂
@@srh2301 это точно!
@@srh2301 Unfortunately the add on only uses extrapolated data & not real data. It also has no feedback or affect on the TH-cam algorithm which recommends videos.
Ok
👎🏻👎🏻👎🏻👎🏻👎🏻👎🏻
Fake.
What’s the point? A lithium battery will self discharge over a period of time (!). A Alkaline cell runs for at least a year and the shelf life of an alkaline is several years if not yet used.. In addition the voltage regulator will also drain the lithium cell.
Ok
This batery is 3,7 volts, not 5 volts
как я понял, там драйвер 18650.
There is another issue that it is not Electronic :
If you glue the battery on a side position, the clock will unbalance and turn around its centre.
It should be glued at the center top, so to point a bit inclined (tilt) with an angle towards ground . But centered correcto y to preserve balance.
Boa lndeia
I will try this ... but .... These style of videos NEVER add a circuit diagram ( why ? ) .... this would help building and also appraise the circuit ( a multiple diode dropper would be SO MUCH simpler ! ) Electronic engineer = DAVE™🛑
bc547 yerine başka transistör olabilirmi
gewoon één weerstand van 10 k er tussen en spanning meten en anders twee er tussen en aanpassen.
Video is rong
1117-1.5 enjoy
Right ok
If only there was a clock that needs 5 volts input.
👍👍👍
Dropper capacitor with rectifier from mains is much more effective device for this, just calculate and insulate it properly.
And much more dangerous as clock is not isolated from mains.
@@JustMe-dx5xl should wall clock mecanism be daily touched by everyone? Just unplug its cord from AC socket before adjusting time.
@@JustMe-dx5xl also, these cheap mechanisms have no exposed metal parts but contacts in battery holder the whole circuit with end of power cord can easily fit into and be sealed with blue tape.
Constant drain of 0.2mA and risk of over discharge of the cell. Rather use diodes in series or other passive way. Or Mosfet instead simple transistor.
Constant drain of 0.2mA and risk of over discharge of the cell. Rather use diodes in series or other passive way. Or Mosfet instead simple transistor.
No sería más fácil poner una pila recargable de 1,5 voltios?
How to buy this device or where to buy this one?
Sir i want 1.80v output not 1.50v pls make it video thanx
How many years can this watch runs on single charged Li ion cell?
Não seria melhor colocar a pilha certa
If only there was an ic that could do this.
Thank you.
Great idea.
Can you make 9v volt amplifier for fm radio
I will try
Ток покоя?.
Gracias
Surely simpler to use a nimh rechargeable AA cell?
Yes. I have been using the same nimh battery for 15 years.
Next idea: how about using a capacitor or supercapacitor instead of a battery? 🤔
how to charge this
tp4056 board
Bol bhi diya karo yaro
Who you callin boy, boy?
Full charge karneke baad kitna hrs chalneke bad fir se charge karna parega 18650 battery ko?
It can last for a long time, even for years, if the battery is in good health and fully charged.
Ok, I will try.
Ok. I may try
That don’t make no sense.
Your video title is 5V to 1.5V and you are using a 18650 battery (3.7V) Is this good for 5V input also ?
Yes of course it can be used with 5V
@@AuxticsTechnologies Thanks
The circuit as presented will NOT work for 5V input. It will output around 2 Volts rather than 1.5V
@@JustMe-dx5xl Ok thanks, but what to change to get to 1.5V ?
Very nice and very compact circuit...